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1mb9

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[[Image:1mb9.gif|left|200px]]<br /><applet load="1mb9" size="350" color="white" frame="true" align="right" spinBox="true"
 
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caption="1mb9, resolution 2.11&Aring;" />
 
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'''BETA-LACTAM SYNTHETASE COMPLEXED WITH ATP'''<br />
 
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==Overview==
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==BETA-LACTAM SYNTHETASE COMPLEXED WITH ATP==
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The catalytic cycle of the ATP/Mg(2+)-dependent enzyme beta-lactam synthetase (beta-LS) from Streptomyces clavuligerus has been observed through a series of x-ray crystallographic snapshots. Chemistry is initiated by the ordered binding of ATP/Mg(2+) and N(2)-(carboxyethyl)-l-arginine (CEA) to the apoenzyme. The apo and ATP/Mg(2+) structures described here, along with the previously described CEA.alpha,beta-methyleneadenosine 5'-triphosphate (CEA.AMP-CPP)/Mg(2+) structure, illuminate changes in active site geometry that favor adenylation. In addition, an acyladenylate intermediate has been trapped. The substrate analog N(2)-(carboxymethyl)-l-arginine (CMA) was adenylated by ATP in the crystal and represents a close structural analog of the previously proposed CEA-adenylate intermediate. Finally, the structure of the ternary product complex deoxyguanidinoproclavaminic acid (DGPC).AMP/PP(i)/Mg(2+) has been determined. The CMA-AMP/PP(i)/Mg(2+) and DGPC.AMP/PP(i)/Mg(2+) structures reveal interactions in the active site that facilitate beta-lactam formation. All of the ATP-bound structures differ from the previously described CEA.AMP-CPP/Mg(2+) structure in that two Mg(2+) ions are found in the active sites. These Mg(2+) ions play critical roles in both the adenylation and beta-lactamization reactions.
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<StructureSection load='1mb9' size='340' side='right'caption='[[1mb9]], [[Resolution|resolution]] 2.11&Aring;' scene=''>
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== Structural highlights ==
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==About this Structure==
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<table><tr><td colspan='2'>[[1mb9]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Streptomyces_clavuligerus Streptomyces clavuligerus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MB9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1MB9 FirstGlance]. <br>
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1MB9 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Streptomyces_clavuligerus Streptomyces clavuligerus] with <scene name='pdbligand=MG:'>MG</scene>, <scene name='pdbligand=ATP:'>ATP</scene>, <scene name='pdbligand=POP:'>POP</scene> and <scene name='pdbligand=AMP:'>AMP</scene> as [http://en.wikipedia.org/wiki/ligands ligands]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MB9 OCA].
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.11&#8491;</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AMP:ADENOSINE+MONOPHOSPHATE'>AMP</scene>, <scene name='pdbligand=ATP:ADENOSINE-5-TRIPHOSPHATE'>ATP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=POP:PYROPHOSPHATE+2-'>POP</scene></td></tr>
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==Reference==
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1mb9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mb9 OCA], [https://pdbe.org/1mb9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1mb9 RCSB], [https://www.ebi.ac.uk/pdbsum/1mb9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1mb9 ProSAT]</span></td></tr>
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The catalytic cycle of beta -lactam synthetase observed by x-ray crystallographic snapshots., Miller MT, Bachmann BO, Townsend CA, Rosenzweig AC, Proc Natl Acad Sci U S A. 2002 Nov 12;99(23):14752-7. Epub 2002 Oct 30. PMID:[http://ispc.weizmann.ac.il//pmbin/getpm?pmid=12409610 12409610]
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</table>
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[[Category: Single protein]]
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== Function ==
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[https://www.uniprot.org/uniprot/BLS_STRCL BLS_STRCL]
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/mb/1mb9_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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=1mb9 ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
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[[Category: Large Structures]]
[[Category: Streptomyces clavuligerus]]
[[Category: Streptomyces clavuligerus]]
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[[Category: Bachmann, B O.]]
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[[Category: Bachmann BO]]
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[[Category: Miller, M T.]]
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[[Category: Miller MT]]
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[[Category: Rosenzweig, A C.]]
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[[Category: Rosenzweig AC]]
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[[Category: Townsend, C A.]]
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[[Category: Townsend CA]]
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[[Category: AMP]]
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[[Category: ATP]]
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[[Category: MG]]
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[[Category: POP]]
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[[Category: asparagine synthetase]]
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[[Category: beta-lactam synthetase]]
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[[Category: carboxyethyl arginine]]
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[[Category: clavulanic acid]]
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[[Category: deoxyguanidinoproclavaminic acid]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 13:53:28 2008''
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Current revision

BETA-LACTAM SYNTHETASE COMPLEXED WITH ATP

PDB ID 1mb9

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