UniProt Accession

 AP2S1_MOUSE; P62743; P70626; P97626; Q00380 

Genbank Protein ID

 AA277150 

Genbank Nucleotide ID

  

Protein Name

 AP-2 complex subunit sigma 

Protein Synonyms/Alias

 Adapter-related protein complex 2 sigma subunit; Adaptor protein complex AP-2 subunit sigma; Clathrin assembly protein 2 small chain; Clathrin coat assembly protein AP17; Clathrin coat-associated protein AP17; Plasma membrane adaptor AP-2 17 kDa protein; Sigma-adaptin 3b; Sigma2-adaptin 

Gene Name

 Ap2s1 

Gene Synonyms/Alias

 Ap17; Claps2 

Created Date

 July 27, 2013 

Organism

 Mus musculus (Mouse) 

NCBI Taxa ID

 10090 

Lysine Modification

Position	Peptide	Type	References
56	FVEFRNFKIIYRRYA	acetylation	[1]
133	TSQTKVLKQLLMLQS	acetylation	[1]

Reference

 [1] Quantitative acetylome analysis reveals the roles of SIRT1 in regulating diverse substrates and cellular pathways.
 Chen Y, Zhao W, Yang JS, Cheng Z, Luo H, Lu Z, Tan M, Gu W, Zhao Y.
 Mol Cell Proteomics. 2012 Oct;11(10):1048-62. [PMID: 22826441] 

Functional Description

 Component of the adaptor protein complex 2 (AP-2). Adaptor protein complexes function in protein transport via Transport vesicles in different membrane traffic pathways. Adaptor protein complexes are vesicle coat components and appear to be involved in cargo selection and vesicle formation. AP-2 is involved in clathrin-dependent endocytosis in which cargo proteins are incorporated into vesicles surrounded by clathrin (clathrin- coated vesicles, CCVs) which are destined for fusion with the early endosome. The clathrin lattice serves as a mechanical scaffold but is itself unable to bind directly to membrane components. Clathrin-associated adaptor protein (AP) complexes which can bind directly to both the clathrin lattice and to the lipid and protein components of membranes are considered to be the major clathrin adaptors contributing the CCV formation. AP-2 also serves as a cargo receptor to selectively sort the membrane proteins involved in receptor-mediated endocytosis. AP-2 seems to play a role in the recycling of synaptic vesicle membranes from the presynaptic surface. AP-2 recognizes Y-X-X-[FILMV] (Y-X-X-Phi) and [ED]-X-X-X-L-[LI] endocytosis signal motifs within the cytosolic tails of transmembrane cargo molecules. AP-2 may also play a role in maintaining normal post-endocytic trafficking through the ARF6-regulated, non-clathrin pathway. The AP-2 alpha and AP-2 sigma subunits are thought to contribute to the recognition of the [ED]-X-X-X-L-[LI] motif. May also play a role in extracellular calcium homeostasis (By similarity). 

Sequence Annotation

 MOD_RES 140 140 Phosphoserine (By similarity).  

Keyword

 3D-structure; Cell membrane; Coated pit; Complete proteome; Membrane; Phosphoprotein; Protein transport; Reference proteome; Transport. 

Sequence Source

 UniProt (SWISSPROT/TrEMBL); GenBank; EMBL 

Protein Length

 142 AA 

Protein Sequence

Gene Ontology

 GO:0030122; C:AP-2 adaptor complex; IEA:Compara.
 GO:0008565; F:protein transporter activity; IEA:InterPro.
 GO:0006886; P:intracellular protein transport; IEA:InterPro.
 GO:0016192; P:vesicle-mediated transport; IEA:InterPro. 

Interpro

 IPR016635; AP_complex_ssu.
 IPR022775; AP_mu_sigma_su.
 IPR027156; APS2.
 IPR000804; Clathrin_sm-chain_CS.
 IPR011012; Longin-like_dom. 

Pfam

 PF01217; Clat_adaptor_s 

SMART

  

PROSITE

 PS00989; CLAT_ADAPTOR_S 

PRINTS