2p6u
From Proteopedia
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|PDB= 2p6u |SIZE=350|CAPTION= <scene name='initialview01'>2p6u</scene>, resolution 3.14Å | |PDB= 2p6u |SIZE=350|CAPTION= <scene name='initialview01'>2p6u</scene>, resolution 3.14Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=PO4:PHOSPHATE ION'>PO4</scene> | + | |LIGAND= <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2p6u FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2p6u OCA], [http://www.ebi.ac.uk/pdbsum/2p6u PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2p6u RCSB]</span> | ||
}} | }} | ||
| Line 25: | Line 28: | ||
[[Category: Hopfner, K P.]] | [[Category: Hopfner, K P.]] | ||
[[Category: Nehring, S.]] | [[Category: Nehring, S.]] | ||
| - | [[Category: PO4]] | ||
[[Category: archaeal helicase]] | [[Category: archaeal helicase]] | ||
[[Category: dna repair]] | [[Category: dna repair]] | ||
[[Category: sf2 helicase]] | [[Category: sf2 helicase]] | ||
| - | ''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 04:30:59 2008'' |
Revision as of 01:31, 31 March 2008
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| , resolution 3.14Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Apo structure of the Hel308 superfamily 2 helicase
Overview
To reveal the mechanism of processive strand separation by superfamily-2 (SF2) 3'-->5' helicases, we determined apo and DNA-bound crystal structures of archaeal Hel308, a helicase that unwinds lagging strands and is related to human DNA polymerase theta. Our structure captures the duplex-unwinding reaction, shows that initial strand separation does not require ATP and identifies a prominent beta-hairpin loop as the unwinding element. Similar loops in hepatitis C virus NS3 helicase and RNA-decay factors support the idea that this duplex-unwinding mechanism is applicable to a broad subset of SF2 helicases. Comparison with ATP-bound SF2 enzymes suggests that ATP promotes processive unwinding of 1 base pair by ratchet-like transport of the 3' product strand. Our results provide a first structural framework for strand separation by processive SF2 3'-->5' helicases and reveal important mechanistic differences from SF1 helicases.
About this Structure
2P6U is a Protein complex structure of sequences from Archaeoglobus fulgidus. Full crystallographic information is available from OCA.
Reference
Structural basis for DNA duplex separation by a superfamily-2 helicase., Buttner K, Nehring S, Hopfner KP, Nat Struct Mol Biol. 2007 Jul;14(7):647-52. Epub 2007 Jun 10. PMID:17558417
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