1aa3

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[[Image:1aa3.gif|left|200px]]
 
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{{Structure
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==C-TERMINAL DOMAIN OF THE E. COLI RECA, NMR, MINIMIZED AVERAGE STRUCTURE==
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|PDB= 1aa3 |SIZE=350|CAPTION= <scene name='initialview01'>1aa3</scene>
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<StructureSection load='1aa3' size='340' side='right'caption='[[1aa3]]' scene=''>
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|SITE=
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== Structural highlights ==
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|LIGAND=
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<table><tr><td colspan='2'>[[1aa3]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli_K-12 Escherichia coli K-12]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AA3 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1AA3 FirstGlance]. <br>
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|ACTIVITY=
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Solution NMR</td></tr>
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|GENE=
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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=1aa3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1aa3 OCA], [https://pdbe.org/1aa3 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1aa3 RCSB], [https://www.ebi.ac.uk/pdbsum/1aa3 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1aa3 ProSAT], [https://www.topsan.org/Proteins/RSGI/1aa3 TOPSAN]</span></td></tr>
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}}
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</table>
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== Function ==
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[https://www.uniprot.org/uniprot/RECA_ECOLI RECA_ECOLI] Can catalyze the hydrolysis of ATP in the presence of single-stranded DNA, the ATP-dependent uptake of single-stranded DNA by duplex DNA, and the ATP-dependent hybridization of homologous single-stranded DNAs. It interacts with LexA causing its activation and leading to its autocatalytic cleavage.[HAMAP-Rule:MF_00268]
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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/aa/1aa3_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=1aa3 ConSurf].
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<div style="clear:both"></div>
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'''C-TERMINAL DOMAIN OF THE E. COLI RECA, NMR, MINIMIZED AVERAGE STRUCTURE'''
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==See Also==
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*[[3D structures of recombinase A|3D structures of recombinase A]]
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__TOC__
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==Overview==
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</StructureSection>
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RecA protein and its homologs catalyze homologous pairing of dsDNA and ssDNA, a critical reaction in homologous genetic recombination in various organisms from a virus, microbes to higher eukaryotes. In this reaction, RecA protein forms a nucleoprotein filament on ssDNA, which in turn binds to naked dsDNA for homology search. We suggested that the C-terminal domain of RecA protein plays a role in capturing the dsDNA. Here, we isolated the C-terminal domain as a soluble form and determined the solution structure by NMR spectroscopy. The overall folding of the NMR structure agrees with that of the corresponding part of the reported crystal structure, but a remarkable difference was found in a solvent-exposed region due to intermolecular contacts in the crystal. Then, we studied the interaction between the C-terminal domain and DNA, and found that significant chemical shift changes were induced in a specific region by titration with dsDNA. SsDNA induced a much smaller chemical shift perturbation. The difference of DNA concentrations to give the half-saturation of the chemical shift change showed a higher affinity of the C-terminal region toward dsDNA. Combined with our previous results, these provide direct evidence that the defined region in the C-terminal domain furnishes a binding surface for DNA.
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[[Category: Escherichia coli K-12]]
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[[Category: Large Structures]]
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==About this Structure==
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[[Category: Aihara H]]
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1AA3 is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AA3 OCA].
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[[Category: Ito Y]]
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[[Category: Kurumizaka H]]
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==Reference==
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[[Category: Shibata T]]
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An interaction between a specified surface of the C-terminal domain of RecA protein and double-stranded DNA for homologous pairing., Aihara H, Ito Y, Kurumizaka H, Terada T, Yokoyama S, Shibata T, J Mol Biol. 1997 Nov 28;274(2):213-21. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9398528 9398528]
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[[Category: Terada T]]
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[[Category: Escherichia coli]]
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[[Category: Yokoyama S]]
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[[Category: Single protein]]
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[[Category: Aihara, H.]]
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[[Category: Ito, Y.]]
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[[Category: Kurumizaka, H.]]
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[[Category: RSGI, RIKEN Structural Genomics/Proteomics Initiative.]]
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[[Category: Shibata, T.]]
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[[Category: Terada, T.]]
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[[Category: Yokoyama, S.]]
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[[Category: double-stranded dna binding domain]]
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[[Category: riken structural genomics/proteomics initiative]]
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[[Category: rsgi]]
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[[Category: structural genomic]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 09:55:05 2008''
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Current revision

C-TERMINAL DOMAIN OF THE E. COLI RECA, NMR, MINIMIZED AVERAGE STRUCTURE

PDB ID 1aa3

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