Structural highlights
Function[MLTB_ECOLI] Murein-degrading enzyme. Catalyzes the cleavage of the glycosidic bonds between N-acetylmuramic acid and N-acetylglucosamine residues in peptidoglycan. May play a role in recycling of muropeptides during cell elongation and/or cell division. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedLytic transglycosylases catalyze the cleavage of the beta-1, 4-glycosidic bond between N-acetylmuramic acid (MurNAc) and N-acetylglucosamine (GlcNAc) in peptidoglycan with concomitant formation of a 1,6-anhydro bond in the MurNAc residue. To understand the reaction mechanism of Escherichia coli lytic transglycosylase Slt35, three crystal structures have been determined of Slt35 in complex with two different peptidoglycan fragments and with the lytic transglycosylase inhibitor bulgecin A. The complexes define four sugar-binding subsites (-2, -1, +1, and +2) and two peptide-binding sites in a large cleft close to Glu162. The Glu162 side chain is between the -1 and +1 sugar-binding sites, in agreement with a function as catalytic acid/base. The complexes suggest additional contributions to catalysis from Ser216 and Asn339, residues which are conserved among the MltB/Slt35 lytic transglycosylases. Crystallographic studies of the interactions of Escherichia coli lytic transglycosylase Slt35 with peptidoglycan.,van Asselt EJ, Kalk KH, Dijkstra BW Biochemistry. 2000 Feb 29;39(8):1924-34. PMID:10684641[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References | ||||||||||||||||||||
This page was last modified 02:51, 11 September 2015.