COG4 Antibody – Mouse Monoclonal

The protein encoded by this gene is a component of an oligomeric protein complex involved in the structure and function of the Golgi apparatus. Defects in this gene may be a cause of congenital disorder of glycosylation type IIj. Two transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Aug 2010]

Function: Required for normal Golgi function. Plays a role in SNARE-pin assembly and Golgi-to-ER retrograde transport via its interaction with SCFD1. Ref.9

Subunit structure: Monomer. Component of the conserved oligomeric Golgi (COG) complex which is composed of eight different subunits and is required for normal Golgi morphology and localization. Mediates interaction of SCFD1 with the COG complex. Interacts with STX5. Ref.9 Ref.11

Subcellular location: Golgi apparatus membrane; Peripheral membrane protein; Cytoplasmic side

Probable Ref.6.

Involvement in disease: Congenital disorder of glycosylation 2J (CDG2J) [MIM:613489]: A multisystem disorder caused by a defect in glycoprotein biosynthesis and characterized by under-glycosylated serum glycoproteins. Congenital disorders of glycosylation result in a wide variety of clinical features, such as defects in the nervous system development, psychomotor retardation, dysmorphic features, hypotonia, coagulation disorders, and immunodeficiency. The broad spectrum of features reflects the critical role of N-glycoproteins during embryonic development, differentiation, and maintenance of cell functions.Note: The disease is caused by mutations affecting the gene represented in this entry. Ref.11 Ref.12

Sequence similarities: Belongs to the COG4 family.

Sequence caution: The sequence BAB15483.1 differs from that shown. Reason: Erroneous initiation. Translation N-terminally extended.