coagulation factor VIII associated 1
The information on this page was automatically extracted from online scientific databases.
From NCBI Gene:
This gene is contained entirely within intron 22 of the factor VIII gene; spans less than 2 kb, and is transcribed in the direction opposite of factor VIII. A portion of intron 22 (int22h), containing F8A, is repeated twice extragenically closer to the Xq telomere. Although its function is unknown, the observation that this gene is conserved in the mouse implies it has some function. Unlike factor VIII, this gene is transcribed abundantly in a wide variety of cell types. [provided by RefSeq, Jul 2008]
RAB5A effector molecule that is involved in vesicular trafficking of early endosomes (PubMed:16476778). Mediates the recruitment of HTT by RAB5A onto early endosomes. The HTT-F8A1/F8A2/F8A3-RAB5A complex stimulates early endosomal interaction with actin filaments and inhibits interaction with microtubules, leading to the reduction of endosome motility (PubMed:16476778).
Up-regulated in brain tissue from patients affected by Huntington's disease (at protein level) (PubMed:16476778). In a Huntington's disease mouse model overexpression of F8A1/F8A2/F8A3 impairs proteasome activity leading to the accumulation of mutant HTT and causes defective mitochondrial functions (PubMed:27815841, PubMed:29209146).