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| | ==GLUTAMATE MUTASE (B12-BINDING SUBUNIT), NMR, MINIMIZED AVERAGE STRUCTURE== | | ==GLUTAMATE MUTASE (B12-BINDING SUBUNIT), NMR, MINIMIZED AVERAGE STRUCTURE== |
| | <StructureSection load='1b1a' size='340' side='right' caption='[[1b1a]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''> | | <StructureSection load='1b1a' size='340' side='right' caption='[[1b1a]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''> |
| | == Structural highlights == | | == Structural highlights == |
| - | <table><tr><td colspan='2'>[[1b1a]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_cochlearius"_douglas_et_al._in_bulloch_et_al._1919 "bacillus cochlearius" douglas et al. in bulloch et al. 1919]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B1A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1B1A FirstGlance]. <br> | + | <table><tr><td colspan='2'>[[1b1a]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1B1A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1B1A FirstGlance]. <br> |
| - | </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GLMS ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1494 "Bacillus cochlearius" Douglas et al. in Bulloch et al. 1919])</td></tr> | + | </td></tr><tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Methylaspartate_mutase Methylaspartate mutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.99.1 5.4.99.1] </span></td></tr> |
| - | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Methylaspartate_mutase Methylaspartate mutase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=5.4.99.1 5.4.99.1] </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=1b1a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b1a OCA], [http://pdbe.org/1b1a PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1b1a RCSB], [http://www.ebi.ac.uk/pdbsum/1b1a PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1b1a 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=1b1a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b1a OCA], [http://pdbe.org/1b1a PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1b1a RCSB], [http://www.ebi.ac.uk/pdbsum/1b1a PDBsum]</span></td></tr> | + | |
| | </table> | | </table> |
| | == Function == | | == Function == |
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| | <text>to colour the structure by Evolutionary Conservation</text> | | <text>to colour the structure by Evolutionary Conservation</text> |
| | </jmolCheckbox> | | </jmolCheckbox> |
| - | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf]. | + | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1b1a ConSurf]. |
| | <div style="clear:both"></div> | | <div style="clear:both"></div> |
| | <div style="background-color:#fffaf0;"> | | <div style="background-color:#fffaf0;"> |
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| | __TOC__ | | __TOC__ |
| | </StructureSection> | | </StructureSection> |
| - | [[Category: Bacillus cochlearius douglas et al. in bulloch et al. 1919]] | |
| | [[Category: Methylaspartate mutase]] | | [[Category: Methylaspartate mutase]] |
| | [[Category: Bothe, H]] | | [[Category: Bothe, H]] |
| Structural highlights
Function
[GMSS_CLOCO] Catalyzes the carbon skeleton rearrangement of L-glutamate to L-threo-3-methylaspartate ((2S,3S)-3-methylaspartate).[HAMAP-Rule:MF_00526][1] [2] [3]
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 PubMed
Glutamate mutase (Glm) is an adenosylcobamide-dependent enzyme that catalyzes the reversible rearrangement of (2S)-glutamate to (2S, 3S)-3-methylaspartate. The active enzyme from Clostridium cochlearium consists of two subunits (of 53.6 and 14.8 kDa) as an alpha2beta2 tetramer, whose assembly is mediated by coenzyme B12. The smaller of the protein components, GlmS, has been suggested to be the B12-binding subunit. Here we report the solution structure of GlmS, determined from a heteronuclear NMR-study, and the analysis of important dynamical aspects of this apoenzyme subunit. The global fold and dynamic behavior of GlmS in solution are similar to those of the corresponding subunit MutS from C. tetanomorphum, which has previously been investigated using NMR-spectroscopy. Both solution structures of the two Glm B12-binding subunits share striking similarities with that determined by crystallography for the B12-binding domain of methylmalonyl CoA mutase (Mcm) from Propionibacterium shermanii, which is B12 bound. In the crystal structure a conserved histidine residue was found to be coordinated to cobalt, displacing the endogenous axial ligand of the cobamide. However, in GlmS and MutS the sequence motif, Asp-x-His-x-x-Gly, which includes the cobalt-coordinating histidine residue, and a predicted alpha-helical region following the motif, are present as an unstructured and highly mobile loop. In the absence of coenzyme, the B12-binding site apparently is only partially formed. By comparing the crystal structure of Mcm with the solution structures of B12-free GlmS and MutS, a consistent picture on the mechanism of B12 binding has been obtained. Important elements of the binding site only become structured upon binding B12; these include the cobalt-coordinating histidine residue, and an alpha helix that forms one side of the cleft accommodating the nucleotide 'tail' of the coenzyme.
Structure and dynamics of the B12-binding subunit of glutamate mutase from Clostridium cochlearium.,Hoffmann B, Konrat R, Bothe H, Buckel W, Krautler B Eur J Biochem. 1999 Jul;263(1):178-88. PMID:10429202[4]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Leutbecher U, Bocher R, Linder D, Buckel W. Glutamate mutase from Clostridium cochlearium. Purification, cobamide content and stereospecific inhibitors. Eur J Biochem. 1992 Apr 15;205(2):759-65. PMID:1315276
- ↑ Zelder O, Beatrix B, Leutbecher U, Buckel W. Characterization of the coenzyme-B12-dependent glutamate mutase from Clostridium cochlearium produced in Escherichia coli. Eur J Biochem. 1994 Dec 1;226(2):577-85. PMID:7880251
- ↑ Zelder O, Beatrix B, Buckel W. Cloning, sequencing and expression in Escherichia coli of the gene encoding component S of the coenzyme B12-dependent glutamate mutase from Clostridium cochlearium. FEMS Microbiol Lett. 1994 May 1;118(1-2):15-21. PMID:8013871
- ↑ Hoffmann B, Konrat R, Bothe H, Buckel W, Krautler B. Structure and dynamics of the B12-binding subunit of glutamate mutase from Clostridium cochlearium. Eur J Biochem. 1999 Jul;263(1):178-88. PMID:10429202
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