7tzi

Structure of a pseudomurein peptide ligase type E from Methanothermobacter thermautotrophicus

spinqualitylabelsall models 7tzi, resolution 2.91Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7tzi is a 2 chain structure with sequence from Methanothermobacter thermautotrophicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.911Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A7J4MVA9_METTF Publication Abstract from PubMed Archaea have diverse cell wall types, yet none are identical to bacterial peptidoglycan (murein). Methanogens Methanobacteria and Methanopyrus possess cell walls of pseudomurein, a structural analogue of murein. Pseudomurein differs from murein in containing the unique archaeal sugar N-acetyltalosaminuronic acid instead of N-acetylmuramic acid, beta-1,3 glycosidic bonds in place of beta-1,4 bonds and only l-amino acids in the peptide cross-links. We have determined crystal structures of methanogen pseudomurein peptide ligases (termed pMurE) from Methanothermus fervidus (Mfer762) and Methanothermobacter thermautotrophicus (Mth734) that are structurally most closely related to bacterial MurE peptide ligases. The homology of the archaeal pMurE and bacterial MurE enzymes is clear both in the overall structure and at the level of each of the three domains. In addition, we identified two UDP-binding sites in Mfer762 pMurE, one at the exterior surface of the interface of the N-terminal and middle domains, and a second site at an inner surface continuous with the highly conserved interface of the three domains. Residues involved in ATP binding in MurE are conserved in pMurE, suggesting that a similar ATP-binding pocket is present at the interface of the middle and the C-terminal domains of pMurE. The presence of pMurE ligases in members of the Methanobacteriales and Methanopyrales, that are structurally related to bacterial MurE ligases, supports the idea that the biosynthetic origins of archaeal pseudomurein and bacterial peptidoglycan cell walls are evolutionarily related. Structural characterisation of methanogen pseudomurein cell wall peptide ligases homologous to bacterial MurE/F murein peptide ligases.,Subedi BP, Schofield LR, Carbone V, Wolf M, Martin WF, Ronimus RS, Sutherland-Smith AJ Microbiology (Reading). 2022 Sep;168(9). doi: 10.1099/mic.0.001235. PMID:36178458 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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