Understanding molecular enzymology of porphyrin-binding α + β barrel proteins - One fold, multiple functions.

ABSTRACT: There is a high functional diversity within the structural superfamily of porphyrin-binding dimeric α + β barrel proteins. In this review we aim to analyze structural constraints of chlorite dismutases, dye-decolorizing peroxidases and coproheme decarboxylases in detail. We identify regions of structural variations within the highly conserved fold, which are most likely crucial for functional specificities. The loop linking the two ferredoxin-like domains within one subunit can be of different sequence lengths and can adopt various structural conformations, consequently defining the shape of the substrate channels and the respective active site architectures. The redox cofactor, heme b or coproheme, is oriented differently in either of the analyzed enzymes. By thoroughly dissecting availab

SUBMITTER: Hofbauer S 

PROVIDER: S-EPMC7611857 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature