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<div class="action-panel-control-wrap">
<label for="email-citation-format" class="action-panel-label">
Format:
</label>
<select id="email-citation-format" name="citation-format" class="action-panel-selector email-citation-format">
<option selected="selected" value="summary">Summary</option>
<option value="summary-text">Summary (text)</option>
<option value="abstract">Abstract</option>
<option value="abstract-text">Abstract (text)</option>
</select>
</div>
<div class="include-supplemental-container">
<input type="checkbox" aria-label="Include MeSH and other data" name="include-supplemental" id="email-include-supplemental" class="email-include-supplemental">
<label for="email-include-supplemental" class="email-include-supplemental-label">MeSH and other data</label>
</div>
<div class="form-field recaptcha ">
<div class="g-recaptcha" id="id-recaptcha" data-sitekey="6LfsWHMdAAAAAClKbtOpjQ2pMjgsGxvv7NdZW9uI"></div>
</div>
<div id="captcha-error-message" class="usa-input-error-message captcha-validation-message" role="alert"></div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Sending..."
data-ga-category="save_share"
data-ga-action="email"
data-ga-label="send">
Send email
</button>
<button class="action-panel-cancel"
aria-label="Close 'Email citations' panel"
ref="linksrc=close_email_panel"
aria-controls="email-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="email"
data-ga-label="cancel">
Cancel
</button>
</div>
<input type="hidden" name="email-search-details" value="" />
<input type="hidden" name="email-search-details-hash" value="0e42663a6c3bd85498fcb88798998fed7bfdc45d457db35281e41afe13cc0524" />
</form>
</div>
</div>
<div id="collections-action-panel"
class="collections-action-panel action-panel in-progress-dots-panel"
aria-hidden="true"
data-collections-open-panel-enabled="false"
data-collections-open-panel-url-hash="#open-collections-panel">
<div class="inner-wrap">
<h3 class="action-panel-heading">
Add to Collections
</h3>
<form id="collections-action-panel-form"
class="collections-action-panel-form action-panel-content action-form action-panel-smaller-selectors"
data-existing-collections-url="/list-existing-collections/"
data-add-to-existing-collection-url="/add-to-existing-collection/"
data-create-and-add-to-new-collection-url="/create-and-add-to-new-collection/"
data-get-article-ids-by-search-url="/get-article-ids-by-search/"
data-myncbi-max-collection-name-length="100"
data-add-to-collection-max-amount="1000"
data-collections-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/">
<input type="hidden" name="csrfmiddlewaretoken" value="uvhbpuNrQdv9lGoNspkro8lfmvQaCfKmLi1g2kgNqOiDf7uD5IXtSgRTUzymvQiG">
<div class="choice-group" role="radiogroup">
<ul class="radio-group-items">
<li>
<input type="radio"
id="collections-action-panel-new"
class="collections-new"
name="collections"
value="new"
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="collections_radio_new">
<label for="collections-action-panel-new">Create a new collection</label>
</li>
<li>
<input type="radio"
id="collections-action-panel-existing"
class="collections-existing"
name="collections"
value="existing"
checked="true"
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="collections_radio_existing">
<label for="collections-action-panel-existing">Add to an existing collection</label>
</li>
</ul>
</div>
<div class="controls-wrapper">
<div class="action-panel-control-wrap new-collections-controls">
<label for="collections-action-panel-add-to-new" class="action-panel-label required-field-asterisk">
Name your collection:
</label>
<input
type="text"
name="add-to-new-collection"
id="collections-action-panel-add-to-new"
class="collections-action-add-to-new"
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/"
maxlength="100"
data-ga-category="save_share"
data-ga-action="create_collection"
data-ga-label="non_favorties_collection">
<div class="collections-new-name-too-long usa-input-error-message selection-validation-message">
Name must be less than 100 characters
</div>
</div>
<div class="action-panel-control-wrap existing-collections-controls">
<label for="collections-action-panel-add-to-existing" class="action-panel-label">
Choose a collection:
</label>
<select id="collections-action-panel-add-to-existing"
class="action-panel-selector collections-action-add-to-existing"
data-ga-category="save_share"
data-ga-action="select_collection"
data-ga-label="($('#collections-action-add-to-existing').val() === 'Favorites') ? 'Favorites' : 'non_favorites_collection'">
</select>
<div class="collections-retry-load-on-error usa-input-error-message selection-validation-message">
Unable to load your collection due to an error<br>
<a href="#">Please try again</a>
</div>
</div>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Adding..."
data-pinger-ignore
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="add">
Add
</button>
<button class="action-panel-cancel"
aria-label="Close 'Add to Collections' panel"
ref="linksrc=close_collections_panel"
aria-controls="collections-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="collections"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="bibliography-action-panel"
class="bibliography-action-panel action-panel in-progress-dots-panel"
aria-hidden="true"
data-bibliography-open-panel-enabled="false"
data-bibliography-open-panel-url-hash="#open-bibliography-panel">
<div class="inner-wrap">
<h3 class="action-panel-heading">
Add to My Bibliography
</h3>
<form id="bibliography-action-panel-form"
class="bibliography-action-panel-form action-panel-content action-form action-panel-smaller-selectors"
data-add-to-bibliography-max-amount="100"
data-add-to-bibliography-batch-size="10"
data-bibliography-delegates-url="/list-bibliography-delegates/"
data-add-to-bibliography-url="/add-to-bibliography/"
data-get-article-ids-by-search-url="/get-article-ids-by-search/"
data-mybib-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/mybibliography/">
<input type="hidden" name="csrfmiddlewaretoken" value="uvhbpuNrQdv9lGoNspkro8lfmvQaCfKmLi1g2kgNqOiDf7uD5IXtSgRTUzymvQiG">
<div class="action-panel-control-wrap bibliographies-controls">
<div class="choice-group">
<ul class="bibliographies-action-add radio-group-items">
<li>
<input name="bibliography" id="my-bibliography" class="my-bibliography" type="radio" checked/>
<label for="my-bibliography">My Bibliography</label>
</li>
</ul>
</div>
</div>
<div class="bibliographies-retry-load-on-error usa-input-error-message selection-validation-message">
Unable to load your delegates due to an error<br>
<a href="#">Please try again</a>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Adding..."
data-pinger-ignore>
Add
</button>
<button class="action-panel-cancel"
aria-label="Close 'Add to bibliography' panel"
ref="linksrc=close_bibliography_panel"
aria-controls="bibliography-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="mybib"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="saved-search-action-panel" class="saved-search-action-panel action-panel " aria-hidden="true"
data-saved-search-open-panel-enabled="false"
data-saved-search-open-panel-url-hash="#open-saved-search-panel">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Your saved search
</h2>
<form id="saved-search-action-panel-form"
class="saved-search-action-panel-form action-panel-content action-form"
data-create-saved-search-url="/create-saved-search/"
data-try-search-terms-url="/try-search-term/"
data-saved-search-root-url="https://www.ncbi.nlm.nih.gov/myncbi/searches/">
<input type="hidden" name="csrfmiddlewaretoken" value="uvhbpuNrQdv9lGoNspkro8lfmvQaCfKmLi1g2kgNqOiDf7uD5IXtSgRTUzymvQiG">
<div class="action-panel-control-wrap">
<label for="saved-search-name" class="action-panel-label saved-search-name-label required-field-asterisk">
Name of saved search:
</label>
<input maxlength="200"
type="text"
name="saved-search-name"
id="saved-search-name"
class="saved-search-name"
value=""
required
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/">
</div>
<div class="action-panel-control-wrap">
<label for="saved-search-term" class="action-panel-label required-field-asterisk">
Search terms:
</label>
<textarea name="saved-search-term" id="saved-search-term" class="saved-search-term" required></textarea>
</div>
<div class="test-search-term-wrap">
<a href="#" class="try-search-term">Test search terms</a>
</div>
<div class="choice-group action-panel-extra-margin-top">
<span class="action-panel-label" id="fieldset-label">
Would you like email updates of new search results?
</span>
<fieldset id="saved-search-alert" aria-describedby="fieldset-label">
<legend class="usa-sr-only">Saved Search Alert Radio Buttons</legend>
<ul class="radio-group-items">
<li>
<input type="radio" id="saved-search-alert-yes" class="saved-search-alert-yes" name="saved-search-alert" value="yes" checked>
<label for="saved-search-alert-yes" class="action-panel-label">Yes</label>
</li>
<li>
<input aria-label="No radio input" type="radio" id="saved-search-alert-no" class="saved-search-alert-no" name="saved-search-alert" value="no">
<label for="saved-search-alert-no" class="action-panel-label">No</label>
</li>
</ul>
</fieldset>
</div>
<div class="alert-schedule-wrap">
<div class="action-panel-control-wrap">
<label class="action-panel-label">
Email:
</label>
<span aria-label="Email address" id="saved-search-email" class="action-panel-label"><span class="action-panel-label-bold"></span> (<a class="myncbi-account-settings" href="https://www.ncbi.nlm.nih.gov/account/settings/">change</a>)</span>
</div>
<div class="action-panel-control-wrap action-panel-extra-margin-top">
<label for="saved-search-frequency" class="action-panel-label">
Frequency:
</label>
<select id="saved-search-frequency" class="no-border-panel-selector saved-search-frequency">
<option value="monthly">Monthly</option>
<option value="weekly">Weekly</option>
<option value="daily">Daily</option>
</select>
</div>
<div class="action-panel-control-wrap saved-search-monthly-additional">
<label for="saved-search-monthly-on-day" class="action-panel-label">
Which day?
</label>
<select id="saved-search-monthly-on-day" class="no-border-panel-selector">
<option value="Sunday">The first Sunday</option>
<option value="Monday">The first Monday</option>
<option value="Tuesday">The first Tuesday</option>
<option value="Wednesday">The first Wednesday</option>
<option value="Thursday">The first Thursday</option>
<option value="Friday">The first Friday</option>
<option value="Saturday">The first Saturday</option>
<option value="day">The first day</option>
<option value="weekday">The first weekday</option>
</select>
</div>
<div class="action-panel-control-wrap saved-search-weekly-additional">
<label for="saved-search-weekly-on-day" class="action-panel-label">
Which day?
</label>
<select id="saved-search-weekly-on-day" class="no-border-panel-selector saved-search-weekly-on-day">
<option value="Sunday">Sunday</option>
<option value="Monday">Monday</option>
<option value="Tuesday">Tuesday</option>
<option value="Wednesday">Wednesday</option>
<option value="Thursday">Thursday</option>
<option value="Friday">Friday</option>
<option value="Saturday">Saturday</option>
</select>
</div>
<div class="action-panel-control-wrap">
<label for="saved-search-report" class="action-panel-label">
Report format:
</label>
<select id="saved-search-report" class="no-border-panel-selector saved-search-report">
<option value="DocSum">Summary</option>
<option value="DocSumText">Summary (text)</option>
<option value="Abstract">Abstract</option>
<option value="AbstractText">Abstract (text)</option>
<option value="MEDLINE">PubMed</option>
</select>
</div>
<div class="action-panel-control-wrap">
<label for="saved-search-amount" class="action-panel-label">
Send at most:
</label>
<select id="saved-search-amount" class="no-border-panel-selector saved-search-amount">
<option value="1">1 item</option>
<option value="5" selected>5 items</option>
<option value="10">10 items</option>
<option value="20">20 items</option>
<option value="50">50 items</option>
<option value="100">100 items</option>
<option value="200">200 items</option>
</select>
</div>
<div>
<input type="checkbox" id="saved-search-send-if-no-result" class="saved-search-send-if-no-result" name="saved-search-send-if-no-result">
<label for="saved-search-send-if-no-result" class="action-panel-label smaller-checkbox">
Send even when there aren't any new results
</label>
</div>
<div class="action-panel-control-wrap option-text-in-email-wrap">
<label for="saved-search-email-text" class="action-panel-label">
Optional text in email:
</label>
<textarea name="saved-search-email-text"
id="saved-search-email-text"
class="saved-search-email-text"></textarea>
</div>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Saving..."
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="save">
Save
</button>
<button class="action-panel-cancel"
aria-label="Close 'Your saved search' panel"
ref="linksrc=close_saved_search_panel"
aria-controls="saved-search-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="citation-manager-action-panel" class="citation-manager-action-panel action-panel" aria-hidden="true">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Create a file for external citation management software
</h2>
<form id="citation-manager-action-panel-form"
class="action-panel-content action-form"
action="/results-export-ids/"
data-by-search-action="/results-export-search-data/"
data-by-ids-action="/results-export-ids/"
method="post"
data-by-search-method="post"
data-by-ids-method="post">
<input type="hidden" name="csrfmiddlewaretoken" value="uvhbpuNrQdv9lGoNspkro8lfmvQaCfKmLi1g2kgNqOiDf7uD5IXtSgRTUzymvQiG">
<input name="results-format" type="hidden" value="pubmed"/>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Sending..."
data-ga-category="save_share"
data-ga-action="citation_manager"
data-ga-label="save">
Create file
</button>
<button class="action-panel-cancel"
aria-label="Close 'Send citations to citation manager' panel"
ref="linksrc=close_citation_manager_panel"
aria-controls="citation-manager-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="citation_manager"
data-ga-label="cancel">
Cancel
</button>
</div>
</form>
</div>
</div>
<div id="rss-action-panel" class="rss-action-panel action-panel " aria-hidden="true">
<div class="inner-wrap">
<h2 class="action-panel-heading">
Your RSS Feed
</h2>
<form id="rss-action-panel-form"
class="rss-action-panel-form action-panel-content action-form"
data-create-rss-feed-url="/create-rss-feed-url/"
data-search-form-term-value="">
<input type="hidden" name="csrfmiddlewaretoken" value="uvhbpuNrQdv9lGoNspkro8lfmvQaCfKmLi1g2kgNqOiDf7uD5IXtSgRTUzymvQiG">
<div class="action-panel-control-wrap">
<label for="rss-name" class="action-panel-label required-field-asterisk">
Name of RSS Feed:
</label>
<input maxlength="200"
placeholder="Name"
type="text"
name="rss-name"
id="rss-name"
class="rss-name"
value=''
required
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/">
</div>
<div class="rss-limit-wrap">
<div class="action-panel-control-wrap action-panel-extra-margin-top">
<label for="rss-limit" class="action-panel-label">
Number of items displayed:
</label>
<select id="rss-limit" class="no-border-panel-selector rss-limit">
<option value="5">5</option>
<option value="10">10</option>
<option value="15" selected="selected">15</option>
<option value="20">20</option>
<option value="50">50</option>
<option value="100">100</option>
</select>
</div>
</div>
<div class="action-panel-actions">
<button class="action-panel-submit"
type="submit"
data-loading-label="Creating..."
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="save">
Create RSS
</button>
<button class="action-panel-cancel"
aria-label="Close 'Your RSS' panel"
ref="linksrc=close_rss_panel"
aria-controls="rss-action-panel"
aria-expanded="false"
data-ga-category="save_share"
data-ga-action="alert"
data-ga-label="cancel">
Cancel
</button>
</div>
<div class="action-panel-control-wrap rss-link-copy-wrap">
<label for="rss-link" class="usa-sr-only">RSS Link</label>
<input placeholder="Your RSS Feed Link" type="text" name="rss-link" id="rss-link" class="rss-link" title="RSS Link">
<button
type="button"
disabled
class="rss-link-copy-button disabled"
data-ga-category="save_share"
data-ga-action="rss"
data-ga-label="copy">
Copy
</button>
</div>
</form>
</div>
</div>
</div>
</div>
<div class="article-page" id="article-page" data-article-pmid="22632968">
<aside class="page-sidebar">
<div class="inner-wrap">
<div class="full-text-links">
<div class="full-view">
<h3 class="title">
Full text links
</h3>
<div class="full-text-links-list">
<a class="link-item
dialog-focus"
href="https://linkinghub.elsevier.com/retrieve/pii/S0092-8674(12)00524-7"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=False&amp;PrId=3048&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=22632968&amp;db=pubmed&amp;nlmid=0413066"
title="See full text options at Elsevier Science"
data-ga-category="full_text"
data-ga-action="Elsevier Science"
data-ga-label="22632968"
><img src="https://cdn.ncbi.nlm.nih.gov/corehtml/query/egifs/https:--linkinghub.elsevier.com-ihub-images-celloa.png" alt="Elsevier Science full text link"><span class="text">
Elsevier Science
</span></a><a class="link-item
pmc
"
href="https://pmc.ncbi.nlm.nih.gov/articles/pmid/22632968/"
target="_blank"
rel="noopener"
ref="linksrc=fulltextorjournal_fulltext&amp;is_pmc=True&amp;PrId=3494&amp;itool=Abstract-def&amp;log$=linkouticon&amp;uid=22632968&amp;db=pubmed&amp;nlmid=0413066"
title="Free full text at PubMed Central"
data-ga-category="full_text"
data-ga-action="PMC"
data-ga-label="22632968"
><span class="text">
Free PMC article
</span></a>
</div>
</div>
<div class="short-view">
<a href="#" class="full-text-links-button full-text-links-dialog-trigger">
Full text links
</a>
</div>
</div>
<div class="actions-buttons sidebar"><h3 class="title">Actions</h3><div class="inner-wrap"><button class="citation-button citation-dialog-trigger"
aria-label="Open dialog with citation text in different styles"
data-ga-category="save_share"
data-ga-action="cite"
data-ga-label="open"
data-all-citations-url="/22632968/citations/"
data-citation-style="nlm"
data-pubmed-format-link="/22632968/export/"><span class="button-label">Cite</span></button><link type="text/css" href="ncbi-overlay-block/src/overlay-block.css"><div class="collections-button-container" data-article-id="22632968" data-article-db="pubmed"><button class="collections-button collections-dialog-trigger"
aria-label="Save article in MyNCBI collections."
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="collections_button"
data-collections-open-dialog-enabled="false"
data-collections-open-dialog-url="https://account.ncbi.nlm.nih.gov/?back_url=https%3A%2F%2Fpubmed.ncbi.nlm.nih.gov%2F22632968%2F%23open-collections-dialog"
data-in-collections="false"><span class="button-label">Collections</span></button><div class="overlay" role="dialog"><div id="collections-action-dialog"
class="dialog collections-dialog"
aria-hidden="true"><div class="title">Add to Collections</div><div class="collections-action-panel action-panel"><form id="collections-action-dialog-form"
class="collections-action-panel-form action-panel-content action-form action-panel-smaller-selectors"
data-existing-collections-url="/list-existing-collections/"
data-add-to-existing-collection-url="/add-to-existing-collection/"
data-create-and-add-to-new-collection-url="/create-and-add-to-new-collection/"
data-myncbi-max-collection-name-length="100"
data-collections-root-url="https://www.ncbi.nlm.nih.gov/myncbi/collections/"><input type="hidden" name="csrfmiddlewaretoken" value="uvhbpuNrQdv9lGoNspkro8lfmvQaCfKmLi1g2kgNqOiDf7uD5IXtSgRTUzymvQiG"><div class="choice-group" role="radiogroup"><ul class="radio-group-items"><li><input type="radio"
id="collections-action-dialog-new"
class="collections-new"
name="collections"
value="new"
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="collections_radio_new"><label for="collections-action-dialog-new">Create a new collection</label></li><li><input type="radio"
id="collections-action-dialog-existing"
class="collections-existing"
name="collections"
value="existing"
checked="true"
data-ga-category="collections_button"
data-ga-action="click"
data-ga-label="collections_radio_existing"><label for="collections-action-dialog-existing">Add to an existing collection</label></li></ul></div><div class="controls-wrapper"><div class="action-panel-control-wrap new-collections-controls"><label for="collections-action-dialog-add-to-new" class="action-panel-label required-field-asterisk">
Name your collection:
</label><input
type="text"
name="add-to-new-collection"
id="collections-action-dialog-add-to-new"
class="collections-action-add-to-new"
pattern="[^&quot;&amp;=&lt;&gt;\/]*" title="The following characters are not allowed in the Name field: &quot;&amp;=&lt;&gt;/"
maxlength="100"
data-ga-category="collections_button"
data-ga-action="create_collection"
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Linker of nucleoskeleton and cytoskeleton (LINC) complexes span the nuclear envelope and are composed of KASH and SUN proteins residing in the outer and inner nuclear membrane, respectively. LINC formation relies on direct binding of KASH and SUN in the perinuclear space. Thereby, molecular tethers are formed that can transmit forces for chromosome movements, nuclear migration, and anchorage. We present crystal structures of the human SUN2-KASH1/2 complex, the core of the LINC complex. The SUN2 domain is rigidly attached to a trimeric coiled coil that prepositions it to bind three KASH peptides. The peptides bind in three deep and expansive grooves formed between adjacent SUN domains, effectively acting as molecular glue. In addition, a disulfide between conserved cysteines on SUN and KASH covalently links both proteins. The structure provides the basis of LINC complex formation and suggests a model for how LINC complexes might arrange into higher-order clusters to enhance force-coupling.
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data-label-slug="figure-1">
<a class="figure-link"
href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/533c226d59fa/nihms378425f1.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-0"
role="button"
data-image-width="800"
data-image-height="615"
data-image-alt="Figure 1"
data-pmc-id="PMC3383001"
data-figure-id="F1">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-0"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/176517ee54a4/nihms378425f1.gif"
alt="Figure 1" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="800">
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<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 1. A Minimal Coiled-coil and the… </p>
</strong>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 1. A Minimal Coiled-coil and the SUN Domain are Required for KASH Binding </p>
</strong>
<div class="figure-caption-contents"><p> (A)… </p></div>
</div>
<figcaption id="figure-caption-0" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 1. A Minimal Coiled-coil and the SUN Domain are Required for KASH Binding
</strong>
<div class="figure-caption-contents">(A) Schematic representation of zz-KASH fusion proteins. The luminal peptides of Nesprin-1 and Nesprin-2 (29 aa) were fused to an N-terminal protein A tag (zz-KASH1 and zz-KASH2). zz-KASH2Δ lacks the C-terminal amino acids PPPT. (B) SUN1 and SUN2 from HeLa cells bind to zz-KASH peptides in vitro. HeLa cells were lysed in RIPA buffer and the extract was incubated with immobilized zz-KASH fusion proteins. Bound proteins were eluted and analyzed by immunoblotting using α-SUN1 and α-SUN2 antibodies. Loads in input and pulldown lanes correspond to 2.5% and 20% of the total, respectively. (C) Schematic representation of SUN2 constructs used in pulldown experiments in (D). Coiled-coil regions were predicted using Parcoil2 (McDonnell et al., 2006). (D) KASH binding of recombinant SUN2 fragments. His-tagged SUN2 fragments were expressed in <i>E. coli</i>, purified and added at 0.25 μg/μl to <i>E. coli</i> lysate supplemented with RIPA detergents. Mixtures were incubated with immobilized zz-KASH fusion proteins. Bound proteins were eluted and analyzed by SDS-PAGE and Coomassie staining. Loads in the input and pulldown lanes correspond to 1.25% and 10% of the total, respectively. See also Figure S1.</div>
</figcaption>
</figure>
<figure class="figure-item "
itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
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data-label-slug="figure-2">
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href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/97432b8f165a/nihms378425f2.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-1"
role="button"
data-image-width="800"
data-image-height="1013"
data-image-alt="Figure 2"
data-pmc-id="PMC3383001"
data-figure-id="F2">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-1"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/061c152200c9/nihms378425f2.gif"
alt="Figure 2" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="800">
<meta itemprop="height" itemtype="http://schema.org/ImageObject" content="1013">
<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 2. Structural Analysis of the SUN-KASH… </p>
</strong>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 2. Structural Analysis of the SUN-KASH Interaction </p>
</strong>
<div class="figure-caption-contents"><p> (A) Overview of a SUN2 <sub> 522717 </sub> protomer… </p></div>
</div>
<figcaption id="figure-caption-1" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 2. Structural Analysis of the SUN-KASH Interaction
</strong>
<div class="figure-caption-contents">(A) Overview of a SUN2<sub>522717</sub> protomer isolated from its binding partners in the trimeric SUN-KASH complex. The protein is organized around a compact β-sandwich core, decorated with features important for function (labeled). Bound cation in green. (B) Top view of the SUN2<sub>522717</sub> protomer (facing the outer nuclear membrane), rotated by 90° around the horizontal axis relative to the view in (A). The apo-protomer of SUN2<sub>522717</sub> is superimposed in red. Only the region with significant change is shown, coinciding largely with the KASH-lid. (C) Top view of the trimeric SUN2<sub>522717</sub>-KASH2 complex. The trimerizing SUN2 domains in cartoon representation and colored in shades of blue, the KASH2 peptide in orange. The peptide is covalently bound via a disulfide bridge between KASH2-C6862 and SUN2-C563. (D) Same view as (C), but SUN2<sub>522717</sub> in surface representation, illustrating how each bound KASH2 peptide is clamped between two SUN2 protomers. (E) Side view of the SUN2-KASH2 complex, illustrating the deep binding pocket on SUN2 into which the terminal four residues of the KASH peptide bind. (F) Sedimentation equilibrium ultracentrifugation analysis of apo-SUN2<sub>335717</sub>. The experiment was performed at two protein concentrations and two centrifugation speeds. Data was fitted for a single species. Fitted curves overlaid over primary data (dots) in red and black for the two speeds. Residuals in the upper panel. The mass was determined to be 131.3 ± 6.1 kDa, the calculated mass is 138 kDa for the trimer. See also Figures S2, S4, S5.</div>
</figcaption>
</figure>
<figure class="figure-item "
itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
data-slide-index="2"
data-label-slug="figure-3">
<a class="figure-link"
href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/e0989e2738a6/nihms378425f3.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-2"
role="button"
data-image-width="625"
data-image-height="1039"
data-image-alt="Figure 3"
data-pmc-id="PMC3383001"
data-figure-id="F3">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-2"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/45e1a4a9b93e/nihms378425f3.gif"
alt="Figure 3" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="625">
<meta itemprop="height" itemtype="http://schema.org/ImageObject" content="1039">
<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 3. Details of the SUN-KASH Interaction </p>
</strong>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 3. Details of the SUN-KASH Interaction </p>
</strong>
<div class="figure-caption-contents"><p> (A) Close-up view of the SUN2-KASH2 interaction. Two… </p></div>
</div>
<figcaption id="figure-caption-2" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 3. Details of the SUN-KASH Interaction
</strong>
<div class="figure-caption-contents">(A) Close-up view of the SUN2-KASH2 interaction. Two neighboring SUN protomers are shown in two shades of blue, with the KASH2 peptides in between in orange. Surface of the SUN2 binding area is half-transparent. KASH residues crucial for interaction are numbered. 0 denotes the C-terminal residue of the peptide. Pocket residues that abolish KASH-binding if mutated are labeled. (B) Same view of the SUN2-KASH1 interaction. Residues that differ between KASH1 and KASH2 are colored in green. (C) Multiple sequence alignment of the four identified human KASH proteins, followed by a list of KASH peptides from highly diverged eukaryotes. The numbers match residues important for SUN binding. See also Figure S3.</div>
</figcaption>
</figure>
<figure class="figure-item "
itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
data-slide-index="3"
data-label-slug="figure-4">
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href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/aad974407d05/nihms378425f4.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-3"
role="button"
data-image-width="762"
data-image-height="787"
data-image-alt="Figure 4"
data-pmc-id="PMC3383001"
data-figure-id="F4">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-3"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/da5389fe543f/nihms378425f4.gif"
alt="Figure 4" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="762">
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<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 4. Surface Analysis of the SUN… </p>
</strong>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 4. Surface Analysis of the SUN protomer </p>
</strong>
<div class="figure-caption-contents"><p> The SUN protomer in three different orientations,… </p></div>
</div>
<figcaption id="figure-caption-3" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 4. Surface Analysis of the SUN protomer
</strong>
<div class="figure-caption-contents">The SUN protomer in three different orientations, related to one another by 120° rotations around the vertical axis. (A) Cartoon representation, coloring as in Figure 2A. (B) Surface representation, gradient-colored to illustrate the conservation. (C) Surface representation, colored to show the different binding interfaces to the two neighboring SUN protomers (shades of blue), and the two KASH peptides (shades of orange). See also Figure S2.</div>
</figcaption>
</figure>
<figure class="figure-item "
itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
data-slide-index="4"
data-label-slug="figure-5">
<a class="figure-link"
href="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/5124b433e751/nihms378425f5.jpg"
itemprop="contentUrl"
aria-describedby="figure-caption-4"
role="button"
data-image-width="714"
data-image-height="800"
data-image-alt="Figure 5"
data-pmc-id="PMC3383001"
data-figure-id="F5">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-4"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/1eb0b78cf7c2/nihms378425f5.gif"
alt="Figure 5" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="714">
<meta itemprop="height" itemtype="http://schema.org/ImageObject" content="800">
<div class="figure-caption figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="caption" aria-hidden="true">
<div class="caption-wrap">
<strong class="figure-label">
<p> Figure 5. KASH Interaction Depends on Both… </p>
</strong>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 5. KASH Interaction Depends on Both the Terminal Binding Pocket and the β-Hairpin of… </p>
</strong>
</div>
<figcaption id="figure-caption-4" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 5. KASH Interaction Depends on Both the Terminal Binding Pocket and the β-Hairpin of the SUN Domain
</strong>
<div class="figure-caption-contents">(A) The C-terminal 14 aa of KASH2 are sufficient for interaction with the SUN domain. The depicted zz-KASH2 derivatives were bound to beads and incubated with <i>E. coli</i> lysate of cells expressing His-SUN2<sub>335717</sub>. Bound proteins were eluted and analyzed by SDS-PAGE and Coomassie staining. Loads in the input and pulldown lanes correspond to 1.25% and 10% of the total, respectively. (B) Contribution of conserved residues within the C-terminal 14 aa of KASH2 to SUN binding. Binding of His-SUN2<sub>335717</sub> to the depicted zz-KASH2 derivatives was analyzed as in (A). Note that the extension of the KASH peptide by one residue abolishes SUN interaction. (C) KASH binding of SUN domain mutants. Wildtype His-SUN2<sub>335717</sub> or mutant derivatives were added to <i>E. coli</i> lysate (1.6 μM of trimer) and incubated with immobilized zz-KASH2 as in Figure 1D. Bound proteins were eluted and analyzed as in (A). (D) SUN domain mutants deficient in KASH interaction fail to mediate NE targeting of a SUN domain-dependent reporter construct in vivo. The localization of SPAG4<sub>1189</sub>-SUN2<sub>507717</sub>-GFP wildtype or indicated SUN domain mutants was analyzed after transfection of HeLa cells. Cells were analyzed by confocal fluorescence microscopy.</div>
</figcaption>
</figure>
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itemscope itemtype="http://schema.org/ImageObject"
itemprop="associatedMedia"
data-slide-index="5"
data-label-slug="figure-6">
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itemprop="contentUrl"
aria-describedby="figure-caption-5"
role="button"
data-image-width="800"
data-image-height="931"
data-image-alt="Figure 6"
data-pmc-id="PMC3383001"
data-figure-id="F6">
<img class="figure-thumb" itemprop="thumbnail"
id="article-image-5"
src="https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0f45/3383001/3a16eb6677c0/nihms378425f6.gif"
alt="Figure 6" />
</a>
<meta itemprop="width" itemtype="http://schema.org/ImageObject" content="800">
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<strong class="figure-label">
<p> Figure 6. Model for the LINC-Complex Bridging… </p>
</strong>
</div>
</div>
<div class="figure-caption-medium figure-caption-text" aria-hidden="true">
<strong class="figure-label">
<p> Figure 6. Model for the LINC-Complex Bridging the Nuclear Envelope </p>
</strong>
<div class="figure-caption-contents"><p> The LINC complex is displayed… </p></div>
</div>
<figcaption id="figure-caption-5" class="figure-caption-full figure-caption-text" itemtype="http://schema.org/ImageObject" itemprop="description">
<strong class="figure-label">
Figure 6. Model for the LINC-Complex Bridging the Nuclear Envelope
</strong>
<div class="figure-caption-contents">The LINC complex is displayed to scale within the perinuclear space between ONM and INM. The trimeric SUN2 is modeled based on our experimental structure, with a theoretically calculated trimeric coiled-coil extending N-terminally to the INM (<ext-link xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="uri" xlink:href="http://arteni.cs.dartmouth.edu/cccp/">http://arteni.cs.dartmouth.edu/cccp/</ext-link>). The N-terminal, nucleoplasmic domain is indicated as an oval sphere of approximate size assuming a globular shape. Atomic coordinates for the lipid bilayers and the transmembrane segments are from public sources.</div>
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It takes KASH to hitch to the SUN.
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<span class="docsum-authors full-authors">Burke B.</span>
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<span class="docsum-journal-citation full-journal-citation">Cell. 2012 May 25;149(5):961-3. doi: 10.1016/j.cell.2012.05.004.</span>
<span class="docsum-journal-citation short-journal-citation">Cell. 2012.</span>
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