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Publication Abstract from PubMed

Direct control of the protein quaternary structure (QS) is challenging owing to the complexity of the protein structure. As a protein with a characteristic QS, peroxiredoxin from Aeropyrum pernix K1 (ApPrx) forms a decamer, wherein five dimers associate to form a ring. Here, we disrupted and reconstituted ApPrx QS via amino acid mutations and chemical modifications targeting hot spots for protein assembly. The decameric QS of an ApPrx* mutant, wherein all cysteine residues in wild-type ApPrx were mutated to serine, was destructed to dimers via an F80C mutation. The dimeric ApPrx*F80C mutant was then modified with a small molecule and successfully assembled as a decamer. Structural analysis confirmed that an artificially installed chemical moiety potentially facilitates suitable protein-protein interactions to rebuild a native structure. Rebuilding of dodecamer was also achieved through an additional amino acid mutation. This study describes a facile method to regulate the protein assembly state.

Rebuilding Ring-Type Assembly of Peroxiredoxin by Chemical Modification.,Himiyama T, Tsuchiya Y, Yonezawa Y, Nakamura T Bioconjug Chem. 2020 Dec 17. doi: 10.1021/acs.bioconjchem.0c00587. PMID:33334100^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.