Isoform 3 of Vesicle transport protein SEC20

BNIP1 (also known as SEC20) is a vesicle transport protein that functions in intracellular trafficking pathways (UniProt: Q12981-1). The protein is 271 amino acids in length and is expressed in human tissues. Its specific molecular interactions and regulatory mechanisms remain to be fully characterized in the UniProt record.

BNIP1 participates in vesicle-mediated protein transport, a fundamental process in cellular homeostasis and organellar communication. The protein localizes to multiple subcellular compartments involved in secretory and endocytic pathways. No additional disease associations are documented in the UniProt database for this isoform.

In Alzheimer's Disease brain tissue, BNIP1 isoform 3 is downregulated compared to age-matched controls, with a mean log2 fold-change of −0.52 (Chaparral AD proteomics). This reduction was detected across post-mortem human AD brain analyzed by quantitative proteomics in four subcellular fractions. The functional consequence of decreased BNIP1 levels in AD pathology warrants further investigation, as impaired vesicular trafficking may contribute to neurodegeneration.