KLHL12 Antibody – Rabbit Polyclonal

This gene encodes a member of the KLHL (Kelch-like) family of proteins. This protein has been identified as an autoantigen in the autoimmune disease Sjogren's syndrome and as a potential biomarker in primary biliary cirrhosis. This protein may act as a substrate adaptor of the Cullin-3 ubiquitin ligase complex to promote substrate-specific ubiquitylation. Ubiquitylation by this complex has been shown to regulate the Wnt signaling pathway as well as COPII vesicle coat size. A pseudogene has been identified on chromosome 22. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2014]

KLHL12: Substrate-specific adapter of a BCR (BTB-CUL3-RBX1) E3 ubiquitin ligase complex that acts as a negative regulator of Wnt signaling pathway and ER-Golgi transport. The BCR(KLHL12) complex is involved in ER-Golgi transport by regulating the size of COPII coats, thereby playing a key role in collagen export, which is required for embryonic stem (ES) cells division: BCR(KLHL12) acts by mediating monoubiquitination of SEC31 (SEC31A or SEC31B). As part of the BCR(KLHL12) complex, also acts as a negative regulator of the Wnt signaling pathway by mediating ubiquitination and subsequent proteolysis of DVL3. The BCR(KLHL12) complex also mediates polyubiquitination of DRD4, without leading to degradation of DRD4. Component of the BCR(KLHL12) E3 ubiquitin ligase complex, at least composed of CUL3 and KLHL12 and RBX1. This complex interacts with DVL3 upon activation of the Wnt signaling pathway by WNT3A. Interacts with DRD4, KLHL12 and SEC31A. Ubiquitously expressed. Highly expressed in testis and at lower levels in the submandibular salivary gland. 2 isoforms of the human protein are produced by alternative splicing.

Protein type: Ubiquitin conjugating system

Chromosomal Location of Human Ortholog: 1q32.1

Cellular Component: cytosol; ER to Golgi transport vesicle; Golgi membrane; intracellular membrane-bound organelle; microtubule organizing center

Molecular Function: protein binding; ubiquitin-protein ligase activity

Biological Process: COPII coating of Golgi vesicle; ER to Golgi vesicle-mediated transport; protein monoubiquitination; Wnt receptor signaling pathway