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2b5a

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[[Image:2b5a.gif|left|200px]]
 
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==C.BclI, Control Element of the BclI Restriction-Modification System==
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The line below this paragraph, containing "STRUCTURE_2b5a", creates the "Structure Box" on the page.
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<StructureSection load='2b5a' size='340' side='right'caption='[[2b5a]], [[Resolution|resolution]] 1.54&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'>[[2b5a]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_caldolyticus Bacillus caldolyticus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2B5A OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2B5A 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]] 1.543&#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=ACY:ACETIC+ACID'>ACY</scene></td></tr>
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{{STRUCTURE_2b5a| PDB=2b5a | 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=2b5a FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2b5a OCA], [https://pdbe.org/2b5a PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2b5a RCSB], [https://www.ebi.ac.uk/pdbsum/2b5a PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2b5a ProSAT]</span></td></tr>
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</table>
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'''C.BclI, Control Element of the BclI Restriction-Modification System'''
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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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==Overview==
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<jmolCheckbox>
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Protection from DNA invasion is afforded by restriction-modification systems in many bacteria. The efficiency of protection depends crucially on the relative expression levels of restriction versus methytransferase genes. This regulation is provided by a controller protein, named C protein. Studies of the Bcll system in E. coli suggest that C.Bcll functions as a negative regulator for M.Bcll expression, implying that it plays a role in defense against foreign DNA during virus infection. C.Bcll binds (Kd = 14.3 nM) to a 2-fold symmetric C box DNA sequence that overlaps with the putative -35 promoter region upstream of the bcllM and bcllC genes. The C.Bcll fold comprises five alpha helices: two helices form a helix-turn-helix motif, and the remaining three helices form the extensive dimer interface. The C.Bcll-DNA model proposed suggests that DNA bending might play an important role in gene regulation, and that Glu27 and Asp31 in C.Bcll might function critically in the regulation.
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<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/b5/2b5a_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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==About this Structure==
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<text>to colour the structure by Evolutionary Conservation</text>
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Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2B5A OCA].
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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=2b5a ConSurf].
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==Reference==
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<div style="clear:both"></div>
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Crystal structure of the restriction-modification system control element C.Bcll and mapping of its binding site., Sawaya MR, Zhu Z, Mersha F, Chan SH, Dabur R, Xu SY, Balendiran GK, Structure. 2005 Dec;13(12):1837-47. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16338412 16338412]
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__TOC__
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[[Category: Balendiran, G K.]]
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</StructureSection>
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[[Category: Chan, S H.]]
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[[Category: Large Structures]]
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[[Category: Dabur, R.]]
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[[Category: Balendiran GK]]
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[[Category: Mersha, F.]]
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[[Category: Chan SH]]
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[[Category: Sawaya, M R.]]
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[[Category: Dabur R]]
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[[Category: Xu, S Y.]]
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[[Category: Mersha F]]
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[[Category: Zhu, Z.]]
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[[Category: Sawaya MR]]
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[[Category: Helix-turn-helix motif]]
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[[Category: Xu SY]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:52:28 2008''
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[[Category: Zhu Z]]

Current revision

C.BclI, Control Element of the BclI Restriction-Modification System

PDB ID 2b5a

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