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. 1996 Oct;5(10):2119–2124. doi: 10.1002/pro.5560051019

Participation of water in Hin recombinase--DNA recognition.

C R Robinson 1, S G Sligar 1
PMCID: PMC2143269  PMID: 8897613

Abstract

The participation of water molecules in the interaction between the Hin recombinase and its operator DNA has been detected by analysis of the dissociation constant in the presence of varying concentrations of neutral solutes and cosolvents. The dissociation constant as measured by gel mobility shift assays increased as the concentration of dimethyl sulfoxide, glycerol, sucrose, or polyethylene glycol was increased. Osmotic pressure is the only property that correlates with the change in the dissociation constant for all compounds. This data indicates that binding of a small population of water molecules accompanies formation of the Hin-DNA complex, and points to a novel role for solvent molecules in assisting site specific interaction between DNA-binding proteins and their cognate DNA sequence.

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Selected References

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