Multivesicular Body Subunit 12B
C9orf28
FAM125B
Family With Sequence Similarity 125, Member B
ESCRT-I Complex Subunit MVB12B
FLJ00001
Chromosome 9 Open Reading Frame 28
Protein FAM125B
The protein encoded by this gene is a component of the ESCRT-I complex, a heterotetramer, which mediates the sorting of ubiquitinated cargo protein from the plasma membrane to the endosomal vesicle. ESCRT-I complex plays an essential role in HIV budding and endosomal protein sorting. Depletion and overexpression of this and related protein (MVB12A) inhibit HIV-1 infectivity and induce unusual viral assembly defects, indicating a role for MVB12 subunits in regulating ESCRT-mediated virus budding. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2011]
Forensic Context
A study in the forensically important fly *Sarcophaga peregrina* demonstrated that the MVB12B was consistently up-regulated during postembryonic development from larval to pupal stages, a pattern validated by qRT-PCR [Ren et al. DOI:10.3390/insects13050453]. In a blind study using larval specimens, expression models based on such up-regulated genes, including the MVB12B, showed a significant correlation with developmental time and were able to predict larval age, indicating its utility as a molecular marker for age estimation.