#619380
Table of Contents
A number sign (#) is used with this entry because of evidence that spermatogenic failure-55 (SPGF55) is caused by homozygous mutation in the SPAG17 gene (616554) on chromosome 1p12. One such family has been reported.
Spermatogenic failure-55 (SPGF55) is characterized by male infertility due to asthenozoospermia, with severely reduced sperm motility (Xu et al., 2018).
For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150).
Xu et al. (2018) reported a consanguineous Chinese family in which twin brothers were infertile. Semen analysis in the brothers showed normal volume and normal sperm density and morphology, but the percentages of motile sperm were very low in both brothers. Both couples underwent successful in vitro fertilization.
The transmission pattern of SPGF55 in the family reported by Xu et al. (2018) was consistent with autosomal recessive inheritance.
In infertile twin brothers with severely reduced sperm motility, Xu et al. (2018) identified homozygosity for a missense mutation in the SPAG17 gene (R1448Q; 616554.0001). Their consanguineous Chinese parents and a fertile brother were heterozygous for the mutation, which was present at low minor allele frequency (0.0016) in the East Asian population of the ExAC database.
Xu, X., Sha, Y.-W., Mei, L.-B., Ji, Z.-Y., Qiu, P., Ji, H., Li, P., Wang, T., Li, L. A familial study of twins with severe asthenozoospermia identified a homozygous SPAG17 mutation by whole-exome sequencing. Clin. Genet. 93: 345-349, 2018. [PubMed: 28548327, related citations] [Full Text]
ORPHA: 399805; DO: 0112337;
Location | Phenotype |
Phenotype MIM number |
Inheritance |
Phenotype mapping key |
Gene/Locus |
Gene/Locus MIM number |
---|---|---|---|---|---|---|
1p12 | ?Spermatogenic failure 55 | 619380 | Autosomal recessive | 3 | SPAG17 | 616554 |
A number sign (#) is used with this entry because of evidence that spermatogenic failure-55 (SPGF55) is caused by homozygous mutation in the SPAG17 gene (616554) on chromosome 1p12. One such family has been reported.
Spermatogenic failure-55 (SPGF55) is characterized by male infertility due to asthenozoospermia, with severely reduced sperm motility (Xu et al., 2018).
For a general phenotypic description and discussion of genetic heterogeneity of spermatogenic failure, see SPGF1 (258150).
Xu et al. (2018) reported a consanguineous Chinese family in which twin brothers were infertile. Semen analysis in the brothers showed normal volume and normal sperm density and morphology, but the percentages of motile sperm were very low in both brothers. Both couples underwent successful in vitro fertilization.
The transmission pattern of SPGF55 in the family reported by Xu et al. (2018) was consistent with autosomal recessive inheritance.
In infertile twin brothers with severely reduced sperm motility, Xu et al. (2018) identified homozygosity for a missense mutation in the SPAG17 gene (R1448Q; 616554.0001). Their consanguineous Chinese parents and a fertile brother were heterozygous for the mutation, which was present at low minor allele frequency (0.0016) in the East Asian population of the ExAC database.
Xu, X., Sha, Y.-W., Mei, L.-B., Ji, Z.-Y., Qiu, P., Ji, H., Li, P., Wang, T., Li, L. A familial study of twins with severe asthenozoospermia identified a homozygous SPAG17 mutation by whole-exome sequencing. Clin. Genet. 93: 345-349, 2018. [PubMed: 28548327] [Full Text: https://doi.org/10.1111/cge.13059]
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