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1se8

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Revision as of 06:37, 8 March 2018

Structure of single-stranded DNA-binding protein (SSB) from D. radiodurans

Structural highlights

1se8 is a 1 chain structure with sequence from "micrococcus_radiodurans"_raj_et_al._1960 "micrococcus radiodurans" raj et al. 1960. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
NonStd Res:
Gene:	SSB, DR0099 ("Micrococcus radiodurans" Raj et al. 1960)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[SSB_DEIRA] This protein is essential for replication of the chromosome. It is also involved in DNA recombination and repair (By similarity).

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Single-stranded DNA (ssDNA)-binding (SSB) proteins are uniformly required to bind and protect single-stranded intermediates in DNA metabolic pathways. All bacterial and eukaryotic SSB proteins studied to date oligomerize to assemble four copies of a conserved domain, called an oligonucleotide/oligosaccharide-binding (OB) fold, that cooperate in nonspecific ssDNA binding. The vast majority of bacterial SSB family members function as homotetramers, with each monomer contributing a single OB fold. However, SSB proteins from the Deinococcus-Thermus genera are exceptions to this rule, because they contain two OB folds per monomer. To investigate the structural consequences of this unusual arrangement, we have determined a 1.8-A-resolution x-ray structure of Deinococcus radiodurans SSB. The structure shows that D. radiodurans SSB comprises two OB domains linked by a beta-hairpin motif. The protein assembles a four-OB-fold arrangement by means of symmetric dimerization. In contrast to homotetrameric SSB proteins, asymmetry exists between the two OB folds of D. radiodurans SSB because of sequence differences between the domains. These differences appear to reflect specialized roles that have evolved for each domain. Extensive crystallographic contacts link D. radiodurans SSB dimers in an arrangement that has important implications for higher-order structures of the protein bound to ssDNA. This assembly utilizes the N-terminal OB domain and the beta-hairpin structure that is unique to Deinococcus and Thermus species SSB proteins. We hypothesize that differences between D. radiodurans SSB and homotetrameric bacterial SSB proteins may confer a selective advantage to D. radiodurans cells that aids viability in environments that challenge genomic stability.

Crystal structure of the Deinococcus radiodurans single-stranded DNA-binding protein suggests a mechanism for coping with DNA damage.,Bernstein DA, Eggington JM, Killoran MP, Misic AM, Cox MM, Keck JL Proc Natl Acad Sci U S A. 2004 Jun 8;101(23):8575-80. Epub 2004 May 24. PMID:15159541^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Bernstein DA, Eggington JM, Killoran MP, Misic AM, Cox MM, Keck JL. Crystal structure of the Deinococcus radiodurans single-stranded DNA-binding protein suggests a mechanism for coping with DNA damage. Proc Natl Acad Sci U S A. 2004 Jun 8;101(23):8575-80. Epub 2004 May 24. PMID:15159541 doi:10.1073/pnas.0401331101

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1se8"

@@ Line 1: / Line 1: @@
 ==Structure of single-stranded DNA-binding protein (SSB) from D. radiodurans==
 <StructureSection load='1se8' size='340' side='right' caption='[[1se8]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='NonStdRes'><td class="sblockLbl"><b>[[Non-Standard_Residue|NonStd Res:]]</b></td><td class="sblockDat"><scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">SSB, DR0099 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1299 "Micrococcus radiodurans" Raj et al. 1960])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1se8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1se8 OCA], [http://pdbe.org/1se8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1se8 RCSB], [http://www.ebi.ac.uk/pdbsum/1se8 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1se8 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1se8 OCA], [http://pdbe.org/1se8 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1se8 RCSB], [http://www.ebi.ac.uk/pdbsum/1se8 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1se8 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/se/1se8_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/se/1se8_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

1se8

From Proteopedia

Revision as of 06:37, 8 March 2018

Structure of single-stranded DNA-binding protein (SSB) from D. radiodurans

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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