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< | ==Crystal Structure of the DnaC== | ||
<StructureSection load='2vyf' size='340' side='right'caption='[[2vyf]], [[Resolution|resolution]] 3.60Å' scene=''> | |||
You may | == Structural highlights == | ||
<table><tr><td colspan='2'>[[2vyf]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Geobacillus_kaustophilus_HTA426 Geobacillus kaustophilus HTA426]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2VYF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2VYF FirstGlance]. <br> | |||
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 3.6Å</td></tr> | |||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=AU:GOLD+ION'>AU</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2vyf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2vyf OCA], [https://pdbe.org/2vyf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2vyf RCSB], [https://www.ebi.ac.uk/pdbsum/2vyf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2vyf ProSAT]</span></td></tr> | |||
</table> | |||
== Function == | |||
[https://www.uniprot.org/uniprot/Q5KU75_GEOKA Q5KU75_GEOKA] | |||
== Evolutionary Conservation == | |||
[[Image:Consurf_key_small.gif|200px|right]] | |||
Check<jmol> | |||
<jmolCheckbox> | |||
<scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/vy/2vyf_consurf.spt"</scriptWhenChecked> | |||
<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | |||
<text>to colour the structure by Evolutionary Conservation</text> | |||
</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/main_output.php?pdb_ID=2vyf ConSurf]. | |||
<div style="clear:both"></div> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
DNA helicases are motor proteins that play essential roles in DNA replication, repair and recombination. In the replicative hexameric helicase, the fundamental reaction is the unwinding of duplex DNA; however, our understanding of this function remains vague due to insufficient structural information. Here, we report two crystal structures of the DnaB-family replicative helicase from Geobacillus kaustophilus HTA426 (GkDnaC) in the apo-form and bound to single-stranded DNA (ssDNA). The GkDnaC-ssDNA complex structure reveals that three symmetrical basic grooves on the interior surface of the hexamer individually encircle ssDNA. The ssDNA-binding pockets in this structure are directed toward the N-terminal domain collar of the hexameric ring, thus orienting the ssDNA toward the DnaG primase to facilitate the synthesis of short RNA primers. These findings provide insight into the mechanism of ssDNA binding and provide a working model to establish a novel mechanism for DNA translocation at the replication fork. | |||
The crystal structure of a replicative hexameric helicase DnaC and its complex with single-stranded DNA.,Lo YH, Tsai KL, Sun YJ, Chen WT, Huang CY, Hsiao CD Nucleic Acids Res. 2008 Dec 15. PMID:19074952<ref>PMID:19074952</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 2vyf" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[DnaC helicase loader|DnaC helicase loader]] | |||
*[[Helicase 3D structures|Helicase 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | |||
== | </StructureSection> | ||
[[Category: Geobacillus kaustophilus HTA426]] | |||
[[Category: Large Structures]] | |||
== | [[Category: Hsiao CD]] | ||
[[Category: Lo YH]] | |||
[[Category: Geobacillus kaustophilus | [[Category: Sun YJ]] | ||
[[Category: | [[Category: Tsai KL]] | ||
[[Category: | |||
[[Category: | |||
[[Category: | |||
[[Category: | |||
Latest revision as of 13:05, 9 May 2024
Crystal Structure of the DnaCCrystal Structure of the DnaC
Structural highlights
FunctionEvolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedDNA helicases are motor proteins that play essential roles in DNA replication, repair and recombination. In the replicative hexameric helicase, the fundamental reaction is the unwinding of duplex DNA; however, our understanding of this function remains vague due to insufficient structural information. Here, we report two crystal structures of the DnaB-family replicative helicase from Geobacillus kaustophilus HTA426 (GkDnaC) in the apo-form and bound to single-stranded DNA (ssDNA). The GkDnaC-ssDNA complex structure reveals that three symmetrical basic grooves on the interior surface of the hexamer individually encircle ssDNA. The ssDNA-binding pockets in this structure are directed toward the N-terminal domain collar of the hexameric ring, thus orienting the ssDNA toward the DnaG primase to facilitate the synthesis of short RNA primers. These findings provide insight into the mechanism of ssDNA binding and provide a working model to establish a novel mechanism for DNA translocation at the replication fork. The crystal structure of a replicative hexameric helicase DnaC and its complex with single-stranded DNA.,Lo YH, Tsai KL, Sun YJ, Chen WT, Huang CY, Hsiao CD Nucleic Acids Res. 2008 Dec 15. PMID:19074952[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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