A structural model of mixed metal sulfide cluster of molybdenum and copper present in the orange protein of Desulfovibrio gigas

A Post-Genomic View of the Ecophysiology, Catabolism and Biotechnological Relevance of Sulphate-Reducing Prokaryotes

“…The protein was reported to contain a non-covalently bound mixed-metal sulphide cluster, (S 2 MoS 2 CuS 2 MoS 2 ) 3 , that provided the characteristic colour and was suggested to be involved in electron transfer (George et al, 2000). Work with model metal clusters mimicking that found in D. gigas showed irreversible instability of the metal-sulphide cluster when oxidized, casting doubt on a redox-active role for the ORP (Maiti, Pal, & Sarkar, 2004). The D. vulgaris COG1433-containing proteins are part of a six-gene bidirectional operon with three genes on either side of a gene encoding an enhancer-binding activator protein for σ 54 -dependent transcription (Fiévet et al, 2011).…”

Flexible CuI–Thiolate Clusters with Relevance to Metallothioneins

“…Each sulfur atom of the phenylthiolate ligand within the cluster adopts an approximate tetrahedral geometry that coordinates three trigonally coordinated copper atoms (triply bridging thiolate ligand). The Cu-S bond lengths [mean 2.2465(17) Å for 1 and mean 2.2502(18) Å for 2] [35] are dependent on the coordination number of the copper atom and distinct ranges can be distinguished: 2.14-2.17 Å for two coordinate [29,36] copper atoms, 2.22-2.23 Å for three coordinate [18,[23][24][25][26]37] copper atoms and 2.33-2.48 Å for four coordinate [38][39][40] copper atoms, and the Cu···Cu separations range from 2.8622(12) to 4.0699(13) Å for 1 and from 2.8242(13) to 4.0557(13) Å for 2. Bond lengths and angles are listed in Table 1.…”

One Electron Reduced Square Planar Bis(benzene-1,2-dithiolato) Copper Dianionic Complex and Redox Switch by O2/HO–

“…The compound [Ph 4 P] 2 [S 2 MoS 2 CuCl] was prepared by the literature procedure. 7 Elemental analyses for carbon, hydrogen, nitrogen, and sulfur were recorded with a PerkinElmer 2400 microanalyser. Absorption spectroscopic measurements were performed on a UV-1800 Shimadzu spectrometer.…”