4rr2: Difference between revisions
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==Crystal structure of human primase== | ==Crystal structure of human primase== | ||
<StructureSection load='4rr2' size='340' side='right' caption='[[4rr2]], [[Resolution|resolution]] 2.65Å' scene=''> | <StructureSection load='4rr2' size='340' side='right' caption='[[4rr2]], [[Resolution|resolution]] 2.65Å' scene=''> | ||
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<table><tr><td colspan='2'>[[4rr2]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RR2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4RR2 FirstGlance]. <br> | <table><tr><td colspan='2'>[[4rr2]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4RR2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4RR2 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SF4:IRON/SULFUR+CLUSTER'>SF4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></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=4rr2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rr2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4rr2 RCSB], [http://www.ebi.ac.uk/pdbsum/4rr2 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=4rr2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4rr2 OCA], [http://pdbe.org/4rr2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4rr2 RCSB], [http://www.ebi.ac.uk/pdbsum/4rr2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4rr2 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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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 4rr2" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 20:31, 18 January 2017
Crystal structure of human primaseCrystal structure of human primase
Structural highlights
Function[PRI1_HUMAN] DNA primase is the polymerase that synthesizes small RNA primers for the Okazaki fragments made during discontinuous DNA replication. [PRI2_HUMAN] DNA primase is the polymerase that synthesizes small RNA primers for the Okazaki fragments made during discontinuous DNA replication. Publication Abstract from PubMedDNA replication in bacteria and eukaryotes requires the activity of DNA primase, a DNA-dependent RNA polymerase that lays short RNA primers for DNA polymerases. Eukaryotic and archaeal primases are heterodimers consisting of small catalytic and large accessory subunits, both of which are necessary for RNA primer synthesis. Understanding of RNA synthesis priming in eukaryotes is currently limited due to the lack of crystal structures of the full-length primase and its complexes with substrates in initiation and elongation states. Here we report the crystal structure of the full-length human primase, revealing the precise overall organization of the enzyme, the relative positions of its functional domains, and the mode of its interaction with modeled DNA and RNA. The structure indicates that the dramatic conformational changes in primase are necessary to accomplish the initiation and then elongation of RNA synthesis. The presence of a long linker between the N- and C-terminal domains of p58 provides the structural basis for the bulk of enzyme's conformational flexibility. Deletion of most of this linker affected the initiation and elongation steps of the primer synthesis. Crystal Structure of the Human Primase.,Baranovskiy AG, Zhang Y, Suwa Y, Babayeva ND, Gu J, Pavlov YI, Tahirov TH J Biol Chem. 2014 Dec 30. pii: jbc.M114.624742. PMID:25550159[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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