IND1, IND2, BlaB-1 and related metallo-beta-lactamases, subclass B1; MBL-fold metallo-hydrolase domain
Includes the chromosome-encoded metallo-beta-lactamases Chryseobacterium indologenes IND-1, IND-2, and IND-7, Elizabethkingia meningoseptica (Chryseobacterium meningosepticum) BlaB, Chryseobacterium gleum CGB-1, and Empedobacter brevis EBR-1. MBLs (class B of the Ambler beta-lactamase classification) are a diverse group of metallo-enzymes that are capable of catalyzing the hydrolysis of a wide range of beta-lactam antibiotics. MBLs have been divided into three subclasses B1, B2 and B3, based on sequence/structural relationships and substrates, with the B1 and B2 MBLs being most closely related to each other. This subgroup of MBLs belongs to the B1 subclass. B1 enzymes are most active with two zinc ions bound in the active site, and have a broad-spectrum substrate profile.
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