5wqw

Publication Abstract from PubMed

Bacterial autolysins can partially hydrolyze cell wall peptidoglycans into small sections to regulate cell separation/division and the growth phase. Clostridium perfringens autolysin (Acp) has an N-terminal cell wall-binding domain and a C-terminal catalytic domain with glucosaminidase activity that belongs to the glycoside hydrolase 73 family. Here, we determined the X-ray structure of the Acp catalytic domain (AcpCD) at 1.76 A resolution. AcpCD has a unique crescent-shaped structure, forming a deep groove for substrate-binding at the center of the protein. The modeling study of the enzyme/substrate complex demonstrated that the length of the substrate-binding groove is closely related to the glucosaminidase activity. Mutagenesis analysis showed that AcpCD likely adopts a neighboring-group mechanism for the catalytic reaction.

Structural and biochemical characterization of the Clostridium perfringens autolysin catalytic domain.,Tamai E, Sekiya H, Goda E, Makihata N, Maki J, Yoshida H, Kamitori S FEBS Lett. 2017 Jan;591(1):231-239. doi: 10.1002/1873-3468.12515. Epub 2016 Dec, 19. PMID:27926788^[1]

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