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1z0b

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[[Image:1z0b.gif|left|200px]]
 
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==Crystal Structure of A. fulgidus Lon proteolytic domain E506A mutant==
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The line below this paragraph, containing "STRUCTURE_1z0b", creates the "Structure Box" on the page.
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<StructureSection load='1z0b' size='340' side='right'caption='[[1z0b]], [[Resolution|resolution]] 1.55&Aring;' scene=''>
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You may change the PDB parameter (which sets the PDB file loaded into the applet)
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== Structural highlights ==
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or the SCENE parameter (which sets the initial scene displayed when the page is loaded),
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<table><tr><td colspan='2'>[[1z0b]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Archaeoglobus_fulgidus Archaeoglobus fulgidus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z0B OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1Z0B FirstGlance]. <br>
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or leave the SCENE parameter empty for the default display.
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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]] 1.55&#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=CA:CALCIUM+ION'>CA</scene></td></tr>
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{{STRUCTURE_1z0b| PDB=1z0b | SCENE= }}
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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=1z0b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1z0b OCA], [https://pdbe.org/1z0b PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1z0b RCSB], [https://www.ebi.ac.uk/pdbsum/1z0b PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1z0b ProSAT]</span></td></tr>
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</table>
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'''Crystal Structure of A. fulgidus Lon proteolytic domain E506A mutant'''
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== Function ==
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[https://www.uniprot.org/uniprot/LONB_ARCFU LONB_ARCFU] ATP-dependent serine protease that mediates the selective degradation of mutant and abnormal proteins as well as certain short-lived regulatory proteins. Degrades polypeptides processively (By similarity).
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== Evolutionary Conservation ==
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==Overview==
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[[Image:Consurf_key_small.gif|200px|right]]
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The atomic-resolution crystal structure of the proteolytic domain (P-domain, residues 415-621) of Archaeoglobus fulgidus B-type Lon protease (wtAfLonB) and the structures of several mutants have revealed significant differences in the conformation of the active-site residues when compared to other known Lon P-domains, despite the conservation of the overall fold. The catalytic Ser509 is facing the solvent and is distant from Lys552, the other member of the catalytic dyad. Instead, the adjacent Asp508 forms an ion pair with the catalytic lysine residue. Glu506, an analog of the putative third catalytic residue from a related Methanococcus jannaschii LonB, also faces the solvent and does not interact with the catalytic dyad. We have established that full-length wtAfLonB is proteolytically active in an ATP-dependent manner. The loss of enzymatic activity of the S509A mutant confirms the functional significance of this residue, while retention of considerable level of activity by the D508A and E506A mutants rules out their critical involvement in catalysis. In contrast to the full-length enzymes, all individually purified P-domains (wild-type and mutants) were inactive, and the mutations had no influence on the active-site structure. These findings raise the possibility that, although isolated proteolytic domains of both AfLonB and E.coli LonA are able to assemble into expected functional hexamers, the presence of the other domains, as well as substrate binding, may be needed to stabilize the productive conformation of their active sites. Thus, the observed conformational variability may reflect the differences in the stability of active-site structures for the proteolytic counterparts of single-chain Lon versus independently folded proteolytic subunits of two-chain AAA+ proteases.
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Check<jmol>
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<jmolCheckbox>
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==About this Structure==
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/z0/1z0b_consurf.spt"</scriptWhenChecked>
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1Z0B is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Archaeoglobus_fulgidus Archaeoglobus fulgidus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Z0B OCA].
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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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==Reference==
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</jmolCheckbox>
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Atomic-resolution crystal structure of the proteolytic domain of Archaeoglobus fulgidus lon reveals the conformational variability in the active sites of lon proteases., Botos I, Melnikov EE, Cherry S, Kozlov S, Makhovskaya OV, Tropea JE, Gustchina A, Rotanova TV, Wlodawer A, J Mol Biol. 2005 Aug 5;351(1):144-57. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16002085 16002085]
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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=1z0b ConSurf].
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<div style="clear:both"></div>
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__TOC__
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</StructureSection>
[[Category: Archaeoglobus fulgidus]]
[[Category: Archaeoglobus fulgidus]]
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[[Category: Endopeptidase La]]
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[[Category: Large Structures]]
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[[Category: Single protein]]
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[[Category: Botos I]]
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[[Category: Botos, I.]]
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[[Category: Cherry S]]
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[[Category: Cherry, S.]]
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[[Category: Gustchina A]]
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[[Category: Gustchina, A.]]
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[[Category: Kozlov S]]
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[[Category: Kozlov, S.]]
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[[Category: Makhovskaya OV]]
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[[Category: Makhovskaya, O V.]]
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[[Category: Melnikov EE]]
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[[Category: Melnikov, E E.]]
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[[Category: Rotanova TV]]
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[[Category: Rotanova, T V.]]
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[[Category: Tropea JE]]
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[[Category: Tropea, J E]]
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[[Category: Wlodawer A]]
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[[Category: Wlodawer, A.]]
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[[Category: Atp-dependent protease]]
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[[Category: B-type lon]]
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[[Category: Catalytic ser-lys dyad]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 17:01:49 2008''
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Current revision

Crystal Structure of A. fulgidus Lon proteolytic domain E506A mutant

PDB ID 1z0b

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