A systematic analysis of human CHMP protein interactions: additional MIT domain-containing proteins bind to multiple components of the human ESCRT III complex
- PMID: 16730941
- DOI: 10.1016/j.ygeno.2006.04.003
A systematic analysis of human CHMP protein interactions: additional MIT domain-containing proteins bind to multiple components of the human ESCRT III complex
Abstract
In Saccharomyces cerevisiae 6 closely related proteins (Did2p, Vps2p, Vps24p, Vps32p, Vps60p, Vps20p) form part of the extended ESCRT III complex. This complex is required for the formation of multivesicular bodies and the degradation of internalized transmembrane receptor proteins. In contrast the human genome encodes 10 homologous proteins (CHMP1A (approved gene symbol PCOLN3), 1B, 2A, 2B, 3 (approved gene symbol VPS24), 4A, 4B, 4C, 5, and 6). In this study we have performed a series of protein interaction experiments to generate a more comprehensive picture of the human CHMP protein-interaction network. Our results describe novel interactions between known components of the human ESCRT III complex and identify a range of putative binding partners, which may indicate new ways in which the function of human CHMP proteins may be regulated. In particular, we show that two further MIT domain-containing proteins (AMSH/STAMBP and LOC129531) interact with multiple components of the human ESCRT III complex.
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