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The BRICHOS domain is found in a variety of proteins implicated in dementia, respiratory distress and cancer. Its exact function is unknown; roles that have been proposed for the domain, which is about 100 amino acids long, include (a) targeting of the protein to the secretory pathway, (b) intramolecular chaperone-like function, and (c) assisting the specialised intracellular protease processing system. This C-terminal domain is embedded in the endoplasmic reticulum lumen, and binds to the N-terminal, transmembrane, SP_C, pfam08999 provided that it is in non-helical conformation. Thus the Brichos domain of proSP-C is a chaperone that induces alpha-helix formation of an aggregation-prone TM region. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",