2zyc

Publication Abstract from PubMed

Glycoside hydrolase (GH) categorized into family 73 plays an important role in degrading bacterial cell wall peptidoglycan. The flagellar protein FlgJ contains N- and C-terminal domains responsible for flagellar rod assembly and peptidoglycan hydrolysis, respectively. A member of family GH-73, the C-terminal domain (SPH1045-C) of FlgJ from Sphingomonas sp. strain A1 was expressed in Escherichia coli, purified, and characterized. SPH1045-C exhibited bacterial cell lytic activity most efficiently at pH 6.0 and 37 degrees C. The X-ray crystallographic structure of SPH1045-C was determined at 1.74 A resolution by single-wavelength anomalous diffraction. The enzyme consists of two lobes, alpha and beta. A deep cleft located between the two lobes can accommodate polymer molecules, suggesting that the active site is located in the cleft. Although SPH1045-C shows a structural homology with family GH-22 and GH-23 lysozymes, the arrangement of the nucleophile/base residue in the active site is specific to each peptidoglycan hydrolase.

Crystal structure of the glycosidase family 73 peptidoglycan hydrolase FlgJ.,Hashimoto W, Ochiai A, Momma K, Itoh T, Mikami B, Maruyama Y, Murata K Biochem Biophys Res Commun. 2009 Mar 27;381(1):16-21. Epub 2009 Feb 7. PMID:19351587^[1]

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