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VPS26A

This gene belongs to a group of vacuolar protein sorting (VPS) genes. The encoded protein is a component of a large multimeric complex, termed the retromer complex, involved in retrograde transport of proteins from endosomes to the trans-Golgi network. The close structural similarity between the yeast and human proteins that make up this complex suggests a similarity in function. Expression studies in yeast and mammalian cells indicate that this protein interacts directly with VPS35, which serves as the core of the retromer complex. Alternative splicing results in multiple transcript variants encoding different isoforms.
Protein class

Plasma proteins, Transporters

Predicted location

Intracellular

Single cell type specificity

Cell type enhanced (Syncytiotrophoblasts)

Immune cell specificity

Low immune cell specificity

Cell line specificity

Low cell line specificity

Interaction

Component of the heterotrimeric retromer cargo-selective complex (CSC), also described as vacuolar protein sorting subcomplex (VPS), formed by VPS26 (VPS26A or VPS26B), VPS29 and VPS35 (PubMed:11102511, PubMed:28892079). The CSC has a highly elongated structure with VPS26 and VPS29 binding independently at opposite distal ends of VPS35 as central platform (By similarity). The CSC is believed to associate with variable sorting nexins to form functionally distinct retromer complex variants. The originally described retromer complex (also called SNX-BAR retromer) is a pentamer containing the CSC and a heterodimeric membrane-deforming subcomplex formed between SNX1 or SNX2 and SNX5 or SNX6 (also called SNX-BAR subcomplex); the respective CSC and SNX-BAR subcomplexes associate with low affinity. The CSC associates with SNX3 to form a SNX3-retromer complex. The CSC associates with SNX27, the WASH complex and the SNX-BAR subcomplex to form the SNX27-retromer complex (Probable). Interacts with VPS29, VPS35, SNX1, SNX2, SNX5, SNX6, SNX3, SNX27, RAB7A, ECPAS, EHD1, WASHC5, SORL1 (PubMed:11102511, PubMed:16190980, PubMed:19619496, PubMed:17868075, PubMed:19531583, PubMed:20682791, PubMed:20923837, PubMed:21725319, PubMed:22279231, PubMed:24344282, PubMed:16732284, PubMed:28892079, PubMed:30213940).

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