1k93

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[[Image:1k93.gif|left|200px]]
 
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{{Structure
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==Crystal structure of the adenylyl cyclase domain of anthrax edema factor (EF) in complex with calmodulin==
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|PDB= 1k93 |SIZE=350|CAPTION= <scene name='initialview01'>1k93</scene>, resolution 2.95&Aring;
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<StructureSection load='1k93' size='340' side='right'caption='[[1k93]], [[Resolution|resolution]] 2.95&Aring;' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND= <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> and <scene name='pdbligand=CA:CALCIUM ION'>CA</scene>
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<table><tr><td colspan='2'>[[1k93]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_anthracis Bacillus anthracis] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The August 2003 RCSB PDB [https://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Calmodulin'' by Shuchismita Dutta and David S. Goodsell is [https://dx.doi.org/10.2210/rcsb_pdb/mom_2003_8 10.2210/rcsb_pdb/mom_2003_8]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K93 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1K93 FirstGlance]. <br>
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|ACTIVITY= [http://en.wikipedia.org/wiki/Adenylate_cyclase Adenylate cyclase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.6.1.1 4.6.1.1]
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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]] 2.95&#8491;</td></tr>
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|GENE=
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>
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}}
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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=1k93 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1k93 OCA], [https://pdbe.org/1k93 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1k93 RCSB], [https://www.ebi.ac.uk/pdbsum/1k93 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1k93 ProSAT]</span></td></tr>
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/CYAA_BACAN CYAA_BACAN] One of the three proteins composing the anthrax toxin, the agent which infects many mammalian species and that may cause death. EF is a calmodulin-dependent adenylyl cyclase that, when associated with PA, causes edema. EF is not toxic by itself and it is required for the survival of germinated spores within macrophages at the early stages of infection. Provokes dramatic elevation of intracellular cAMP levels in the host.
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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/k9/1k93_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=1k93 ConSurf].
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<div style="clear:both"></div>
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'''Crystal structure of the adenylyl cyclase domain of anthrax edema factor (EF) in complex with calmodulin'''
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==See Also==
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*[[Anthrax edema factor 3D structures|Anthrax edema factor 3D structures]]
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*[[Calmodulin 3D structures|Calmodulin 3D structures]]
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==Overview==
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__TOC__
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Oedema factor, a calmodulin-activated adenylyl cyclase, is important in the pathogenesis of anthrax. Here we report the X-ray structures of oedema factor with and without bound calmodulin. Oedema factor shares no significant structural homology with mammalian adenylyl cyclases or other proteins. In the active site, 3'-deoxy-ATP and a single metal ion are well positioned for catalysis with histidine 351 as the catalytic base. This mechanism differs from the mechanism of two-metal-ion catalysis proposed for mammalian adenylyl cyclases. Four discrete regions of oedema factor form a surface that recognizes an extended conformation of calmodulin, which is very different from the collapsed conformation observed in other structures of calmodulin bound to effector peptides. On calmodulin binding, an oedema factor helical domain of relative molecular mass 15,000 undergoes a 15 A translation and a 30 degrees rotation away from the oedema factor catalytic core, which stabilizes a disordered loop and leads to enzyme activation. These allosteric changes provide the first molecular details of how calmodulin modulates one of its targets.
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</StructureSection>
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==Disease==
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Known diseases associated with this structure: Cavernous malformations of CNS and retina OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=604214 604214]], Cerebral cavernous malformations-1 OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=604214 604214]], Hyperkeratotic cutaneous capillary-venous malformations associated with cerebral capillary malformations OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=604214 604214]], Leukemia, acute T-cell lymphoblastic OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=603025 603025]], Leukemia, acute myeloid OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=603025 603025]]
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==About this Structure==
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1K93 is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bacillus_anthracis Bacillus anthracis] and [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. The following page contains interesting information on the relation of 1K93 with [[http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/pdb44_1.html Calmodulin]]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1K93 OCA].
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==Reference==
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Structural basis for the activation of anthrax adenylyl cyclase exotoxin by calmodulin., Drum CL, Yan SZ, Bard J, Shen YQ, Lu D, Soelaiman S, Grabarek Z, Bohm A, Tang WJ, Nature. 2002 Jan 24;415(6870):396-402. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/11807546 11807546]
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[[Category: Adenylate cyclase]]
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[[Category: Bacillus anthracis]]
[[Category: Bacillus anthracis]]
[[Category: Calmodulin]]
[[Category: Calmodulin]]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
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[[Category: Protein complex]]
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[[Category: Large Structures]]
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[[Category: Bard, J.]]
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[[Category: RCSB PDB Molecule of the Month]]
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[[Category: Bohm, A.]]
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[[Category: Bard J]]
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[[Category: Drum, C L.]]
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[[Category: Bohm A]]
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[[Category: Grabarek, Z.]]
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[[Category: Drum CL]]
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[[Category: Lu, D.]]
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[[Category: Grabarek Z]]
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[[Category: Shen, Y Q.]]
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[[Category: Lu D]]
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[[Category: Soelaiman, S.]]
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[[Category: Shen Y-Q]]
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[[Category: Tang, W J.]]
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[[Category: Soelaiman S]]
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[[Category: Yan, S Z.]]
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[[Category: Tang W-J]]
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[[Category: CA]]
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[[Category: Yan S-Z]]
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[[Category: SO4]]
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[[Category: adenylyl cyclase]]
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[[Category: anthrax]]
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[[Category: calmodulin]]
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[[Category: edema factor]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 12:14:13 2008''
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Current revision

Crystal structure of the adenylyl cyclase domain of anthrax edema factor (EF) in complex with calmodulin

PDB ID 1k93

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