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Great metalloclusters in enzymology.

Douglas C Rees¹

¹Division of Chemistry and Chemical Engineering 147-75CH, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, California 91125, USA. dcrees@caltech.edu

Annual Review of Biochemistry

|June 5, 2002

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Metallocluster enzymes perform essential redox reactions using small molecules like N2 and H2. Understanding their complex structures and mechanisms is key to biochemistry and understanding early life.

Area of Science:

Biochemistry
Bioinorganic Chemistry
Enzymology

Background:

Metallocluster-containing enzymes are crucial for biosphere redox transformations.
They utilize small molecules (N2, CO, H2) for metabolic energy and building blocks.
Recent structural data exists for key iron-sulfur and copper-sulfide clusters.

Purpose of the Study:

To review the structural and mechanistic aspects of metallocluster-containing enzymes.
To highlight the novel features of these metalloenzymes.
To underscore the challenges and opportunities in studying these systems.

Main Methods:

Structural biology (X-ray crystallography, etc.)
Biochemical assays
Biophysical characterization

Related Experiment Videos

Synthetic chemistry approaches

Main Results:

Established structures for molybdenum nitrogenase, iron-only hydrogenase, nickel-carbon monoxide dehydrogenase, and nitrous oxide reductase metalloclusters.
Identified novel structural features within these clusters.
Highlighted the ongoing challenges in defining enzyme mechanisms.

Conclusions:

Metalloclusters possess unique structures relevant to catalysis.
Further research is needed to elucidate the mechanisms of these enzymes.
These enzymes offer insights into the origins of biochemical catalysis and the bioinorganic interface.