Adapter related protein complex 1 sigma 1B subunit
Adapter-related protein complex 1 sigma-1B subunit
Adaptor protein complex AP 1 sigma 1B subunit
Adaptor protein complex AP-1 sigma-1B subunit
Adaptor related protein complex 1 sigma 2 subunit
AP 1 complex subunit sigma 2
AP-1 complex subunit sigma-2
Clathrin adaptor complex AP1 sigma 1B subunit
Clathrin assembly protein complex 1 sigma 1B small chain
Clathrin assembly protein complex 1 sigma-1B small chain
Clathrin associated assembly adaptor protein small 1 like
Golgi adaptor HA1 AP1 adaptin sigma 1B subunit
Golgi adaptor HA1/AP1 adaptin sigma-1B subunit
mental retardation X linked 59
Sigma 1B subunit of AP 1 clathrin
Sigma 1B subunit of AP-1 clathrin
Sigma adaptin 1B
FunctionSubunit of clathrin-associated adaptor protein complex 1 that plays a role in protein sorting in the late-Golgi/trans-Golgi network (TGN) and/or endosomes. The AP complexes mediate both the recruitment of clathrin to membranes and the recognition of sorting signals within the cytosolic tails of transmembrane cargo molecules.
Tissue specificityWidely expressed.
Involvement in diseaseDefects in AP1S2 are the cause of mental retardation X-linked type 59 (MRX59) [MIM:300630]. It is characterized by significantly sub-average general intellectual functioning associated with impairments in adaptative behavior and manifested during the developmental period. In contrast to syndromic or specific X-linked mental retardation which also present with associated physical, neurological and/or psychiatric manifestations, intellectual deficiency is the only primary symptom of non-syndromic X-linked mental retardation. MRX59 consists of a mild-to-profound mental retardation. Other features includes hypotonia early in life and delay in walking.
Sequence similaritiesBelongs to the adaptor complexes small subunit family.
Cellular localizationGolgi apparatus. Cytoplasmic vesicle membrane. Membrane > clathrin-coated pit. Component of the coat surrounding the cytoplasmic face of coated vesicles located at the Golgi complex.