3b39: Difference between revisions
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==Structure of the DnaG primase catalytic domain bound to ssDNA== | ==Structure of the DnaG primase catalytic domain bound to ssDNA== | ||
<StructureSection load='3b39' size='340' side='right' caption='[[3b39]], [[Resolution|resolution]] 2.35Å' scene=''> | <StructureSection load='3b39' size='340' side='right' caption='[[3b39]], [[Resolution|resolution]] 2.35Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3b39]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3b39]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Ecoli Ecoli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3B39 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3B39 FirstGlance]. <br> | ||
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1dde|1dde]], [[1dd9|1dd9]], [[1eqn|1eqn]]</td></tr> | </td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1dde|1dde]], [[1dd9|1dd9]], [[1eqn|1eqn]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dnaG, dnaP, parB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dnaG, dnaP, parB ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83333 ECOLI])</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=3b39 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b39 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3b39 RCSB], [http://www.ebi.ac.uk/pdbsum/3b39 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=3b39 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3b39 OCA], [http://pdbe.org/3b39 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3b39 RCSB], [http://www.ebi.ac.uk/pdbsum/3b39 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3b39 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </jmolCheckbox> | ||
</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/ | </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=3b39 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3b39" style="background-color:#fffaf0;"></div> | |||
==See Also== | ==See Also== | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: | [[Category: Ecoli]] | ||
[[Category: Berger, J M]] | [[Category: Berger, J M]] | ||
[[Category: Corn, J E]] | [[Category: Corn, J E]] | ||
Revision as of 12:26, 5 August 2016
Structure of the DnaG primase catalytic domain bound to ssDNAStructure of the DnaG primase catalytic domain bound to ssDNA
Structural highlights
Function[PRIM_ECOLI] DNA primase is the polymerase that synthesizes small RNA primers for the Okazaki fragments on both template strands at replication forks during chromosomal DNA synthesis. 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 PubMedPrimases are essential RNA polymerases required for the initiation of DNA replication, lagging strand synthesis and replication restart. Many aspects of primase function remain unclear, including how the enzyme associates with a moving nucleic acid strand emanating from a helicase and orients primers for handoff to replisomal components. Using a new screening method to trap transient macromolecular interactions, we determined the structure of the Escherichia coli DnaG primase catalytic domain bound to single-stranded DNA. The structure reveals an unanticipated binding site that engages nucleic acid in two distinct configurations, indicating that it serves as a nonspecific capture and tracking locus for template DNA. Bioinformatic and biochemical analyses show that this evolutionarily constrained region enforces template polarity near the active site and is required for primase function. Together, our findings reverse previous proposals for primer-template orientation and reconcile disparate studies to re-evaluate replication fork organization. Identification of a DNA primase template tracking site redefines the geometry of primer synthesis.,Corn JE, Pelton JG, Berger JM Nat Struct Mol Biol. 2008 Feb;15(2):163-9. Epub 2008 Jan 13. PMID:18193061[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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