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The effect of kirromycin on the metal ion coordination in complexes of elongation factor Tu from Bacillus stearothermophilus as inferred from the ¹⁷O-⁵⁵Mn superhyperfine interaction

Kalbitzer, Hans Robert ; Wittinghofer, A.



Abstract

The binding of the antibiotic kirromycin to elongation factor Tu (EF-Tu) leads to a severe line broadening of the Q-band manganese EPR lines of EF-Tu.Mn, EF-Tu.Mn.GDP, as well as EF-Tu.Mn.GDP.Pi indicating that the coordination sphere of the metal ion is changed by this interaction. The number of coordinated water molecules was determined from the 17O-55Mn superhyperfine coupling observable in ...

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