Acetylene degradation by new isolates of aerobic bacteria and comparison of acetylene hydratase enzymes.

Acetylene degradation by new isolates of aerobic bacteria and comparison of acetylene hydratase enzymes

Living on acetylene. A primordial energy source.

The tungsten iron-sulfur enzyme acetylene hydratase catalyzes the conversion of acetylene to acetaldehyde by addition of one water molecule to the C-C triple bond. For a member of the dimethylsulfoxide (DMSO) reductase family this is a rather unique reaction, since it does not involve a net electron transfer. The acetylene hydratase from the strictly anaerobic bacterium Pelobacter acetylenicus ...

Structure of the non-redox-active tungsten/[4Fe:4S] enzyme acetylene hydratase.

The tungsten-iron-sulfur enzyme acetylene hydratase stands out from its class because it catalyzes a nonredox reaction, the hydration of acetylene to acetaldehyde. Sequence comparisons group the protein into the dimethyl sulfoxide reductase family, and it contains a bis-molybdopterin guanine dinucleotide-ligated tungsten atom and a cubane-type [4Fe:4S] cluster. The crystal structure of acetylen...

A structural comparison of molybdenum cofactor-containing enzymes.

This work gives an overview of the recent achievements which have contributed to the understanding of the structure and function of molybdenum and tungsten enzymes. Known structures of molybdo-pterin cofactor-containing enzymes will be described briefly and the structural differences between representatives of the same and different families will be analyzed. This comparison will show that the ...

Comparison of Stability Cu(C7H3NO4)2 and Valance / Charge Ratio of Oxygen and Carbon atoms in the Complex by Changing the Vinyl, Acetylene, isopropil

In the complex (bispyridine -2 and 6-dicarboxylate copper II)) at position H number 26 with modifications of ligands such as vinyl, acetylene and isopropyl, changes in the valance / charge ratio for oxygen and carbon atoms in these complexes have been investigated by methods Initial calculations (ab initio) have been performed at two levels of HF, DFT. Finally, their stability is compared with ...