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| | ==Structure of the reduced, metal-free form of Mycobacterium tuberculosis peptidoglycan amidase Rv3717== | | ==Structure of the reduced, metal-free form of Mycobacterium tuberculosis peptidoglycan amidase Rv3717== |
| - | <StructureSection load='4m6h' size='340' side='right' caption='[[4m6h]], [[Resolution|resolution]] 2.19Å' scene=''> | + | <StructureSection load='4m6h' size='340' side='right'caption='[[4m6h]], [[Resolution|resolution]] 2.19Å' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[4m6h]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Myctu Myctu]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4M6H OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4M6H FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[4m6h]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_H37Rv Mycobacterium tuberculosis H37Rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4M6H OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4M6H FirstGlance]. <br> |
| - | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4m6g|4m6g]], [[4m6i|4m6i]]</td></tr> | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.194Å</td></tr> |
| - | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MT3820, Rv3717 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83332 MYCTU])</td></tr>
| + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4m6h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m6h OCA], [https://pdbe.org/4m6h PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4m6h RCSB], [https://www.ebi.ac.uk/pdbsum/4m6h PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4m6h ProSAT]</span></td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4m6h FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4m6h OCA], [http://pdbe.org/4m6h PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4m6h RCSB], [http://www.ebi.ac.uk/pdbsum/4m6h PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4m6h ProSAT]</span></td></tr> | + | |
| | </table> | | </table> |
| | + | == Function == |
| | + | [https://www.uniprot.org/uniprot/O69684_MYCTO O69684_MYCTO] |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
| | == Publication Abstract from PubMed == | | == Publication Abstract from PubMed == |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Myctu]] | + | [[Category: Large Structures]] |
| - | [[Category: Alber, T]] | + | [[Category: Mycobacterium tuberculosis H37Rv]] |
| - | [[Category: Huizar, J P]] | + | [[Category: Alber T]] |
| - | [[Category: Mavrici, D]] | + | [[Category: Huizar JP]] |
| - | [[Category: Prigozhin, D M]] | + | [[Category: Mavrici D]] |
| - | [[Category: Structural genomic]] | + | [[Category: Prigozhin DM]] |
| - | [[Category: Vansell, H J]] | + | [[Category: Vansell HJ]] |
| - | [[Category: Hydrolase]]
| + | |
| - | [[Category: National institute of allergy and infectious disease]]
| + | |
| - | [[Category: Niaid]]
| + | |
| - | [[Category: Tbsgc]]
| + | |
| Structural highlights
Function
O69684_MYCTO
Publication Abstract from PubMed
Peptidoglycan hydrolases are key enzymes in bacterial cell wall homeostasis. Understanding the substrate specificity and biochemical activity of peptidoglycan hydrolases in Mycobacterium tuberculosis is of special interest as it can aid in the development of new cell wall targeting therapeutics. In this study, we report biochemical and structural characterization of the mycobacterial N-acetylmuramyl L-alanine amidase Rv3717. The crystal structure of Rv3717 in complex with a dipeptide product shows that, compared to previously characterized peptidoglycan amidases, the enzyme contains an extra disulfide-bonded beta-hairpin adjacent to the active site. The structure of two intermediates in assembly reveal that Zn2+ binding rearranges active site residues, and disulfide formation promotes folding of the beta-hairpin. Although Zn2+ is required for hydrolysis of muramyl dipeptide, disulfide oxidation is not required for activity on this substrate. The orientation of the product in the active site suggests a role for a conserved glutamate (E200) in catalysis; mutation of this residue abolishes activity. The product binds at the head of a closed tunnel, and the enzyme showed no activity on polymerized peptidoglycan. These results point to a potential role for Rv3717 in peptidoglycan fragment recycling.
Structural and biochemical analyses of Mycobacterium tuberculosis N-acetylmuramyl L-alanine amidase Rv3717 point to a role in peptidoglycan fragment recycling.,Prigozhin DM, Mavrici D, Huizar JP, Vansell HJ, Alber T J Biol Chem. 2013 Sep 9. PMID:24019530[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Prigozhin DM, Mavrici D, Huizar JP, Vansell HJ, Alber T. Structural and biochemical analyses of Mycobacterium tuberculosis N-acetylmuramyl L-alanine amidase Rv3717 point to a role in peptidoglycan fragment recycling. J Biol Chem. 2013 Sep 9. PMID:24019530 doi:10.1074/jbc.M113.510792
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