1XP8
Deinococcus radiodurans RecA in complex with ATP-gamma-S
Summary for 1XP8
| Entry DOI | 10.2210/pdb1xp8/pdb |
| Descriptor | RecA protein, PHOSPHOTHIOPHOSPHORIC ACID-ADENYLATE ESTER (3 entities in total) |
| Functional Keywords | recombination, radioresistance, dna-repair, atpase, dna-binding protein, dna binding protein |
| Biological source | Deinococcus radiodurans |
| Total number of polymer chains | 1 |
| Total formula weight | 38994.20 |
| Authors | Bell, C.E.,Rajan, R. (deposition date: 2004-10-08, release date: 2004-12-21, Last modification date: 2023-08-23) |
| Primary citation | Rajan, R.,Bell, C.E. Crystal structure of RecA from Deinococcus radiodurans: insights into the structural basis of extreme radioresistance. J.Mol.Biol., 344:951-963, 2004 Cited by PubMed Abstract: The resistance of Deinococcus radiodurans (Dr) to extreme doses of ionizing radiation depends on its highly efficient capacity to repair dsDNA breaks. Dr RecA, the key protein in the repair of dsDNA breaks by homologous recombination, promotes DNA strand-exchange by an unprecedented inverse pathway, in which the presynaptic filament is formed on dsDNA instead of ssDNA. In order to gain insight into the remarkable repair capacity of Dr and the novel mechanistic features of its RecA protein, we have determined its X-ray crystal structure in complex with ATPgammaS at 2.5A resolution. Like RecA from Escherichia coli, Dr RecA crystallizes as a helical filament that is closely related to its biologically relevant form, but with a more compressed pitch of 67 A. Although the overall fold of Dr RecA is similar to E.coli RecA, there is a large reorientation of the C-terminal domain, which in E.coli RecA has a site for binding dsDNA. Compared to E.coli RecA, the inner surface along the central axis of the Dr RecA filament has an increased positive electrostatic potential. Unique amino acid residues in Dr RecA cluster around a flexible beta-hairpin that has also been implicated in DNA binding. PubMed: 15544805DOI: 10.1016/j.jmb.2004.09.087 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.5 Å) |
Structure validation
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