3qbu

Crystal structure of putative peptidoglycan deactelyase (HP0310) from Helicobacter pylori

spinqualitylabelsall models 3qbu, resolution 2.57Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3qbu is a 4 chain structure with sequence from Helpg. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: ZN Related: 3cl8, 1z7a, 2c1g Gene: hp0310, HPG27_289 (HELPG) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Peptidoglycan deacetlyase (HP0310, HpPgdA) from the gram-negative pathogen Helicobacter pylori, has been indicated as the enzyme responsible for a peptidoglycan modification that counteracts the host immune response. HpPgdA has been cloned, purified and expressed in good yield in E. coli. It has been crystallized, its structure determined and activity tests in vitro performed. The enzyme, which belongs to the polysaccharide deacetylases protein family, is a homo-tetramer. The four polypeptide chains, each folded into a single domain characterized by a non-canonical TIM-barrel fold, are arranged around a four-fold symmetry axis. The active site, one per monomer, contains a heavy ion coordinated in a way similar to other deacetylases. However, the enzyme showed no in vitro activity on the typical polysaccharide substrates of peptidoglycan deacetylases. In striking contrast with the known peptidoglycan deacetylases, HpPgdA does not exhibit a solvent-accessible polysaccharide binding groove, suggesting that the enzyme binds a small molecule at the active site. The Structure of Helicobacter pylori HP0310 Reveals an Atypical Peptidoglycan Deacetylase.,Shaik MM, Cendron L, Percudani R, Zanotti G PLoS One. 2011 Apr 29;6(4):e19207. PMID:21559431 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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