AP4S1

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Identifiers
Aliases
External IDs	GeneCards: [1]
Orthologs
Species	Human	Mouse
Entrez	n/a	n/a
Ensembl	n/a	n/a
UniProt	n/a	n/a
RefSeq (mRNA)	n/a	n/a
RefSeq (protein)	n/a	n/a
Location (UCSC)	n/a	n/a
PubMed search	n/a	n/a
Wikidata
View/Edit Human

AP-4 complex subunit sigma-1 is a protein that in humans is encoded by the AP4S1 gene.

Function

The heterotetrameric adaptor protein (AP) complexes sort integral membrane proteins at various stages of the endocytic and secretory pathways. AP4 is composed of 2 large chains, beta-4 (AP4B1) and epsilon-4 (AP4E1), a medium chain, mu-4 (AP4M1), and a small chain, sigma-4 (AP4S1, this gene).

Clinical relevance

It is currently hypothesized that AP4-complex-mediated trafficking plays a crucial role in brain development and functioning.

See also

• AP2 adaptor complex

External links

• Human AP4S1 genome location and AP4S1 gene details page in the UCSC Genome Browser.

Further reading

• Dell'Angelica EC, Mullins C, Bonifacino JS (1999). "AP-4, a novel protein complex related to clathrin adaptors". J. Biol. Chem. 274 (11): 7278–85. doi:10.1074/jbc.274.11.7278. PMID 10066790.
• Hirst J, Bright NA, Rous B, Robinson MS (1999). "Characterization of a fourth adaptor-related protein complex". Mol. Biol. Cell. 10 (8): 2787–802. doi:10.1091/mbc.10.8.2787. PMC 25515. PMID 10436028.