2q2k: Difference between revisions
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|PDB= 2q2k |SIZE=350|CAPTION= <scene name='initialview01'>2q2k</scene>, resolution 3.00Å | |PDB= 2q2k |SIZE=350|CAPTION= <scene name='initialview01'>2q2k</scene>, resolution 3.00Å | ||
|SITE= | |SITE= | ||
|LIGAND= <scene name='pdbligand=EPE:4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID'>EPE</scene> | |LIGAND= <scene name='pdbligand=5IU:5-IODO-2'-DEOXYURIDINE-5'-MONOPHOSPHATE'>5IU</scene>, <scene name='pdbligand=DA:2'-DEOXYADENOSINE-5'-MONOPHOSPHATE'>DA</scene>, <scene name='pdbligand=DC:2'-DEOXYCYTIDINE-5'-MONOPHOSPHATE'>DC</scene>, <scene name='pdbligand=DG:2'-DEOXYGUANOSINE-5'-MONOPHOSPHATE'>DG</scene>, <scene name='pdbligand=DT:THYMIDINE-5'-MONOPHOSPHATE'>DT</scene>, <scene name='pdbligand=EPE:4-(2-HYDROXYETHYL)-1-PIPERAZINE+ETHANESULFONIC+ACID'>EPE</scene> | ||
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
|DOMAIN= | |||
|RELATEDENTRY= | |||
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2q2k FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2q2k OCA], [http://www.ebi.ac.uk/pdbsum/2q2k PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2q2k RCSB]</span> | |||
}} | }} | ||
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[[Category: Glover, T.]] | [[Category: Glover, T.]] | ||
[[Category: Schumacher, M A.]] | [[Category: Schumacher, M A.]] | ||
[[Category: dna binding protein/dna complex]] | [[Category: dna binding protein/dna complex]] | ||
[[Category: parb]] | [[Category: parb]] | ||
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[[Category: segregation]] | [[Category: segregation]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 04:43:42 2008'' | ||
Revision as of 04:43, 31 March 2008
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| , resolution 3.00Å | |||||||
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| Ligands: | , , , , , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of nucleic-acid binding protein
OverviewOverview
The stable inheritance of genetic material depends on accurate DNA partition. Plasmids serve as tractable model systems to study DNA segregation because they require only a DNA centromere, a centromere-binding protein and a force-generating ATPase. The centromeres of partition (par) systems typically consist of a tandem arrangement of direct repeats. The best-characterized par system contains a centromere-binding protein called ParR and an ATPase called ParM. In the first step of segregation, multiple ParR proteins interact with the centromere repeats to form a large nucleoprotein complex of unknown structure called the segrosome, which binds ParM filaments. pSK41 ParR binds a centromere consisting of multiple 20-base-pair (bp) tandem repeats to mediate both transcription autoregulation and segregation. Here we report the structure of the pSK41 segrosome revealed in the crystal structure of a ParR-DNA complex. In the crystals, the 20-mer tandem repeats stack pseudo-continuously to generate the full-length centromere with the ribbon-helix-helix (RHH) fold of ParR binding successive DNA repeats as dimer-of-dimers. Remarkably, the dimer-of-dimers assemble in a continuous protein super-helical array, wrapping the DNA about its positive convex surface to form a large segrosome with an open, solenoid-shaped structure, suggesting a mechanism for ParM capture and subsequent plasmid segregation.
About this StructureAbout this Structure
2Q2K is a Single protein structure of sequence from Staphylococcus aureus. Full crystallographic information is available from OCA.
ReferenceReference
Segrosome structure revealed by a complex of ParR with centromere DNA., Schumacher MA, Glover TC, Brzoska AJ, Jensen SO, Dunham TD, Skurray RA, Firth N, Nature. 2007 Dec 20;450(7173):1268-71. PMID:18097417
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