Archaeal DNA helicase Hjm apo state in form 1Archaeal DNA helicase Hjm apo state in form 1
Structural highlights
2zj2 is a 1 chain structure with sequence from Pyrococcus furiosus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
HELS_PYRFU DNA-dependent ATPase and 3'-5' DNA helicase that may be involved in repair of stalled replication forks. Unwinds the lagging strand from forked DNA structures in a 3'-5' direction. PCNA, the DNA polymerase sliding clamp subunit, stimulates the helicase activity, and may alter substrate specificity. Unwinds branched DNA (Holliday junctions) in an ATP-dependent fashion; ss- and dsDNA stimulate ATPase to the greatest extent, although it preferentially binds DNA with a single-stranded region. Processes a RecA-mediated recombination intermediate between gapped circular and homologus linear dsDNA.[1][2]
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
References
↑Fujikane R, Komori K, Shinagawa H, Ishino Y. Identification of a novel helicase activity unwinding branched DNAs from the hyperthermophilic archaeon, Pyrococcus furiosus. J Biol Chem. 2005 Apr 1;280(13):12351-8. Epub 2005 Jan 27. PMID:15677450 doi:http://dx.doi.org/10.1074/jbc.M413417200
↑Fujikane R, Shinagawa H, Ishino Y. The archaeal Hjm helicase has recQ-like functions, and may be involved in repair of stalled replication fork. Genes Cells. 2006 Feb;11(2):99-110. PMID:16436047 doi:http://dx.doi.org/10.1111/j.1365-2443.2006.00925.x
