Kelch-like protein 12 (KLHL12)

KLHL12 encodes a cytoplasmic substrate adaptor protein that is a member of the Kelch-like (KLHL) family, characterized by a BTB/POZ domain, BACK domain, and kelch β-propeller domain. KLHL12 functions as an adaptor for Cullin-3-based E3 ubiquitin ligase complexes, conferring substrate specificity to promote ubiquitination of target proteins such as Dishevelled (DVL), SEC31 (involved in COPII vesicle export), and dopamine D4 receptor. By guiding these ubiquitination events, KLHL12 regulates key pathways including Wnt/β-catenin signaling, critical for cell proliferation, differentiation, and tumorigenesis, and ER-to-Golgi trafficking of collagen, which impacts extracellular matrix synthesis and embryonic development. Mutations or dysregulation have been linked to rare congenital disorders and cancer, while its autoantigenic properties are implicated in autoimmune disease. No clinically approved drugs specifically target KLHL12; however, the protein remains of interest for biomarker discovery and mechanistic studies in oncology and immunology.

Other names

Kelch-like protein 12KLHL12C3IP1DKIRCUL3-interacting protein 1DKIR homologkelch-like protein C3IP1

Drugs (hypothetical or experimental) would likely act by inhibiting or modulating its adaptor-mediated substrate ubiquitination, potentially altering Wnt signaling or collagen export