@article{3b8e8aed4eba4d94946fd0f4de946eb4,
title = "Protein-protein interaction between monomers of coliphage HK022 excisionase",
abstract = "Excisionase (Xis) is an accessory protein that is required for the site-specific excision reaction of the coliphages HK022 and λ. Xis binds in a strong cooperative manner to two tandem binding sites (X1 and X2) located on the P arm of the attachment (att) sites on the phage genome. As a result of crosslinking experiments in vivo and in vitro of Xis-overexpressing cells, by gel filtration of purified Xis and by FRET analyses we show that Xis monomers of HK022 interact and form dimers that are not dependent on the single Cys residue of the protein and on the presence of DNA. The formation of the dimers may explain the strong binding cooperativity of Xis to its sites on DNA.",
keywords = "DSG, disuccinimidyl glutarate, DSS, disuccinimidyl suberate, FITC, fluorescein-5-isothiocyanate, FRET, fluorescence resonance energy transfer, TRITC, tetramethylrhodamine-5- (and 6) isothiocyanate, bp, base pairs, β-ME, β-mercaptoethanol",
author = "Pnina Gottfried and Mikhail Kolot and Nava Silberstein and Ezra Yagil",
note = "Funding Information: Oded Suad and Arthur Komlosh helped us with the gel filtration, My Sam sent us the crystal coordinates and Angela Cohen improved the manuscript. The Israel Science Foundation founded by the Academy of Sciences and Humanities supported this work (Grants No. 637/02).",
year = "2004",
month = nov,
day = "5",
doi = "10.1016/j.febslet.2004.09.045",
language = "אנגלית",
volume = "577",
pages = "17--20",
journal = "FEBS Letters",
issn = "0014-5793",
publisher = "John Wiley and Sons Inc.",
number = "1-2",
}