This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
2q2k
From Proteopedia
| Line 1: | Line 1: | ||
| - | [[Image:2q2k.jpg|left|200px]] | + | [[Image:2q2k.jpg|left|200px]] |
| - | + | ||
| - | '''Structure of nucleic-acid binding protein''' | + | {{Structure |
| + | |PDB= 2q2k |SIZE=350|CAPTION= <scene name='initialview01'>2q2k</scene>, resolution 3.00Å | ||
| + | |SITE= | ||
| + | |LIGAND= <scene name='pdbligand=EPE:4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID'>EPE</scene> | ||
| + | |ACTIVITY= | ||
| + | |GENE= | ||
| + | }} | ||
| + | |||
| + | '''Structure of nucleic-acid binding protein''' | ||
| + | |||
==Overview== | ==Overview== | ||
| Line 7: | Line 16: | ||
==About this Structure== | ==About this Structure== | ||
| - | 2Q2K is a [ | + | 2Q2K is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2Q2K OCA]. |
==Reference== | ==Reference== | ||
| - | 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:[http:// | + | 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:[http://www.ncbi.nlm.nih.gov/pubmed/18097417 18097417] |
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Staphylococcus aureus]] | [[Category: Staphylococcus aureus]] | ||
| Line 23: | Line 32: | ||
[[Category: segregation]] | [[Category: segregation]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 18:20:48 2008'' |
Revision as of 16:20, 20 March 2008
| |||||||
| , resolution 3.00Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of nucleic-acid binding protein
Overview
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 Structure
2Q2K is a Single protein structure of sequence from Staphylococcus aureus. Full crystallographic information is available from OCA.
Reference
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
Page seeded by OCA on Thu Mar 20 18:20:48 2008
