The interaction of T4 endonuclease V E23Q mutant with thymine dimer- and tetrahydrofuran-containing DNA

K. A. Latham, R. C. Manuel, Robert (Stephen) Lloyd

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The interaction between endonuclease V, the cyclobutane pyrimidine dimer- specific N-glycosylase/abasic lyase from bacteriophage T4, and DNA was investigated by DNase I footprinting methods. The catalytically inactive mutant E23Q was found to interact with a smaller region of DNA at the abasic site analog, tetrahydrofuran, than at a thymine dimer site. Like the wild- type enzyme, the mutant contacted the DNA substrates primarily on the strand opposite the damage. The various complexes examined by footprinting techniques represent distinct points along the catalytic pathway of endonuclease V: before catalysis at a dimer, after N-glycosylase action but before abasic lyase action, and before catalysis at an abasic site. The differences between the footprints of the mutant and wild-type enzymes on both DNA substrates likely represent subtly different conformations within these complexes.

Original languageEnglish (US)
Pages (from-to)5166-5168
Number of pages3
JournalJournal of Bacteriology
Volume177
Issue number17
StatePublished - 1995
Externally publishedYes

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Pyrimidine Dimers
Deoxyribonuclease (Pyrimidine Dimer)
Lyases
DNA
Catalysis
Bacteriophage T4
Deoxyribonuclease I
Enzymes
phage T4 endonuclease V
tetrahydrofuran

ASJC Scopus subject areas

  • Applied Microbiology and Biotechnology
  • Immunology

Cite this

The interaction of T4 endonuclease V E23Q mutant with thymine dimer- and tetrahydrofuran-containing DNA. / Latham, K. A.; Manuel, R. C.; Lloyd, Robert (Stephen).

In: Journal of Bacteriology, Vol. 177, No. 17, 1995, p. 5166-5168.

Research output: Contribution to journalArticle

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