Metal Ion Transfer in Phosphoglucomutase-Chelate Systems
نویسندگان
چکیده
منابع مشابه
Structural changes at the metal ion binding site during the phosphoglucomutase reaction.
An electron density map of the reactive, Cd2+ form of crystalline phosphoglucomutase from X-ray diffraction studies shows that the enzymic phosphate donates a nonbridging oxygen to the ligand sphere of the bound metal ion, which appears to be tetracoordinate. 31P and 113Cd NMR spectroscopy are used to assess changes in the properties of bound Cd2+ produced by substrate/product and by substrate/...
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The metal ion requirement of the phosphoglucomutase reaction is satisfied by Mg+, Ni +, Co +, Mn2+, Cd2+, or Zn+. The relative activities elicited by these metals are 100, 60, 15, 5, 0.8, and 0.3, respectively, at pH 7.4 and saturating substrate; the relative activity of enzyme extensively dialyzed against EDTA type chelating agents is less than 0.001 under the same conditions but the expected ...
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This paper is essentially a progress report on the developments in the field of metal chelate catalysis since the first review of this subject fifteen years ago'. For the purpose of defining the scope of this field, metal chelate catalysis is considered to include any reaction that is altered or modified by metal ions through chelate ring formation, as well as reactions of metal chelates themse...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1967
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)95871-0