2F4F image
Deposition Date 2005-11-23
Release Date 2005-12-13
Last Version Date 2024-03-13
Entry Detail
PDB ID:
2F4F
Keywords:
Title:
Crystal structure of IS200 transposase
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Resolution:
1.80 Å
R-Value Free:
0.23
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
C 1 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:Transposase, putative
Gene (Uniprot):SSO1474
Chain IDs:A, B
Chain Length:133
Number of Molecules:2
Biological Source:Sulfolobus solfataricus
Ligand Molecules
Primary Citation
Crystal Structure of a Metal Ion-bound IS200 Transposase
J.Biol.Chem. 281 4261 4266 (2006)
PMID: 16340015 DOI: 10.1074/jbc.M511567200

Abstact

IS200 transposases, present in many bacteria and Archaea, appear to be distinct from other groups of transposases. To provide a structural basis for understanding the action of IS200 transposases, we have determined the crystal structure of the SSO1474 protein from Sulfolobus solfataricus, a member of the IS200 family, in both Mn(2+)-bound and Mn(2+)-free forms. Its monomer fold is distinct from other classes of structurally characterized transposases. Two monomers form a tight dimer by exchanging the C-terminal alpha-helix and by merging the two central beta-sheets into a large beta-sheet. Glu(55), His(62), and four water molecules provide the direct coordination sphere of the catalytically essential metal ion in the Mn(2+)-bound structure. His(16), Asp(59), and His(60) also play important roles in maintaining the metal binding site. The catalytic site is formed at the interface between monomers. The candidate nucleophile in the transposition mechanism, strictly conserved Tyr(121) coming from the other monomer, is turned away from the active site, suggesting that a conformational change is likely to occur during the catalytic cycle.

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Primary Citation of related structures