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Armadillo repeat-containing protein 5 (ARMC5) is a member of the armadillo (ARM) repeat containing family.1 It is composed of an N-terminal ARM repeat domain and C-terminal BTB/POZ domain that each act as scaffolds for protein-protein interactions. ARMC5 is ubiquitously expressed, localizes to the cytoplasm, and undergoes alternative splicing.1,2 It interacts with cullin 3 via the BTB domain to form an E3 ligase complex that ubiquitinates proteins such as sterol regulatory element binding protein (SREBP) and several RNA polymerase II subunits, including DNA-directed RNA polymerase II subunit (RPB1).3,4,5 ARMC5 is involved in T cell proliferation and differentiation, lung morphogenesis, adrenal cortex and neural tube development, and tumor suppression.1,4 Mutations in ARMC5 are associated with primary bilateral macronodular adrenal hyperplasia (PBMAH).6 Cayman’s ARMC5 (human, recombinant) protein can be used for enzyme activity assays and has a calculated molecular weight of 97.7 kDa.
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1. Advancements in the research of the structure, function, and disease-
2. Analysis of ARMC5 expression in human tissues. Mol. Cell. Endocrinol. 441, 140-145 (2017).
3. The role of oxidative stress, glucocorticoid receptor and ARMC5 in lipid metabolism. Endocr. J. 71(12), 1097-1101 (2024).
4. ARMC5 controls the degradation of most Pol II subunits, and ARMC5 mutation increases neural tube defect risks in mice and humans. Genome Biol. 25(1), 19 (2024).
5. ARMC5 is part of an RPB1-
6. ARMC5 mutations in familial and sporadic primary bilateral macronodular adrenal hyperplasia. PLoS One 13(1), e0191602 (2018).