Open AccessEngineering of protein bound iron‐sulfur clusters
Author(s) -
BEINERT Helmut,
KENNEDY Mary Claire
Publication year - 1989
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1989.tb15170.x
Subject(s) - aconitase , electron paramagnetic resonance , chemistry , iron–sulfur cluster , cluster (spacecraft) , sulfur , electron transfer , crystallography , enzyme , mössbauer spectroscopy , substrate (aquarium) , nuclear magnetic resonance , biochemistry , physics , biology , organic chemistry , ecology , computer science , programming language
An increasing number of iron‐sulfur (Fe‐S) proteins are found in which the Fe‐S cluster is not involved in net electron transfer, as it is in the majority of Fe‐S proteins. Most of the former are (de)hydratases, of which the most extensively studied is aconitase. Approaches are described and discussed by which the Fe‐S cluster of this enzyme could be brought into states of different structure, ligation, oxidation and isotope composition. The species, so obtained, provided the basis for spectroscopic and chemical investigations. Results from studies by protein chemistry, EPR, Mössbauer, 1 H, 2 H and 57 Fe electron‐nuclear double resonance spectroscopy are described. Conclusions, which bear on the electronic structure of the Fe‐S cluster, enzyme‐substrate interaction and the enzymatic mechanism, were derived from a synopsis of the recent work described here and of previous contributions from several laboratories. These conclusions are discussed and summarized in a final section.