4D1Q image
Deposition Date 2014-05-04
Release Date 2014-07-30
Last Version Date 2024-05-08
Entry Detail
PDB ID:
4D1Q
Title:
Hermes transposase bound to its terminal inverted repeat
Biological Source:
Source Organism:
MUSCA DOMESTICA (Taxon ID: 7370)
Host Organism:
Method Details:
Experimental Method:
Resolution:
3.40 Å
R-Value Free:
0.25
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
P 32 2 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:TRANSPOSASE
Mutations:YES
Chain IDs:A, B, G, H
Chain Length:536
Number of Molecules:4
Biological Source:MUSCA DOMESTICA
Polymer Type:polydeoxyribonucleotide
Molecule:TERMINAL INVERTED REPEAT
Chain IDs:C, E, I, K
Chain Length:15
Number of Molecules:4
Biological Source:MUSCA DOMESTICA
Polymer Type:polydeoxyribonucleotide
Molecule:TERMINAL INVERTED REPEAT
Chain IDs:D, F, J, L
Chain Length:16
Number of Molecules:4
Biological Source:MUSCA DOMESTICA
Ligand Molecules
Primary Citation
Structural Basis of Hat Transposon End Recognition by Hermes, an Octameric DNA Transposase from Musca Domestica.
Cell(Cambridge,Mass.) 158 353 ? (2014)
PMID: 25036632 DOI: 10.1016/J.CELL.2014.05.037

Abstact

Hermes is a member of the hAT transposon superfamily that has active representatives, including McClintock's archetypal Ac mobile genetic element, in many eukaryotic species. The crystal structure of the Hermes transposase-DNA complex reveals that Hermes forms an octameric ring organized as a tetramer of dimers. Although isolated dimers are active in vitro for all the chemical steps of transposition, only octamers are active in vivo. The octamer can provide not only multiple specific DNA-binding domains to recognize repeated subterminal sequences within the transposon ends, which are important for activity, but also multiple nonspecific DNA binding surfaces for target capture. The unusual assembly explains the basis of bipartite DNA recognition at hAT transposon ends, provides a rationale for transposon end asymmetry, and suggests how the avidity provided by multiple sites of interaction could allow a transposase to locate its transposon ends amidst a sea of chromosomal DNA.

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Primary Citation of related structures