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Volumn 132, Issue 14, 2010, Pages 5215-5226

Anatomy of a red copper center: Spectroscopic identification and reactivity of the copper centers of bacillus subtilis Sco and its Cys-to-ala variants

Author keywords

[No Author keywords available]

Indexed keywords

AUTOREDUCTION; BACILLUS SUBTILIS; BOND STRENGTH; COPPER BONDS; COPPER CENTERS; COPPER PROTEINS; COPPER-CYSTEINE; COVALENCIES; CU COMPLEXES; CUPREDOXINS; CYS RESIDUES; CYTOCHROME C OXIDASE; EDGE DATA; ELECTRON PARAMAGNETIC RESONANCE; ELECTRON-TRANSFER; EXTENDED X-RAY ABSORPTION FINE STRUCTURES; NITROSOCYANIN; OXYGEN LIGANDS; RESONANCE RAMAN SPECTROSCOPY; SIDE CHAINS; SPECTROSCOPIC IDENTIFICATION; TETRAGONAL ARRAYS; THIOLATES; WILD TYPES;

EID: 77950794316     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja910759v     Document Type: Article
Times cited : (37)

References (62)
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    • (1990)
    • George, G.N.1
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    • 77950805723 scopus 로고    scopus 로고
    • 9.2 ed.; Daresbury Laboratory: Warrington, England
    • Binsted, N., Gurman, S. J., and Campbell, J. W.; 9.2 ed.; Daresbury Laboratory: Warrington, England, 1998.
    • (1998)
    • Binsted, N.1    Gurman, S.J.2    Campbell, J.W.3
  • 52
    • 0017666980 scopus 로고
    • An additional factor which must be taken into consideration when comparing the S-K edge data with results from other spectroscopy is a possible difference induced by measuring the data at different temperatures. Due to experimental considerations the S-K edge data were measured at 4 °C rather than the low temperature (10-110 K) used for EXAFS, EPR and resonance Raman data. Phosphate buffers are known to shift downwards in pH by up to 2 pH units upon freezing to 77 K, due to the insolubility of the dibasic salt at low temperature (see:). Therefore we measured the pH dependence of the UV/vis spectrum of the WT BSco from pH 2 to pH 10. Only very minor differences in extinction were observed between pH 7 and pH 2, indicating that the structure of the Cu(II) site remains essentially unchanged over this pH range. A plot of the UV/vis spectrum of BSco vs pH is shown as Supporting Information Figure S8.
    • An additional factor which must be taken into consideration when comparing the S-K edge data with results from other spectroscopy is a possible difference induced by measuring the data at different temperatures. Due to experimental considerations the S-K edge data were measured at 4 °C rather than the low temperature (10-110 K) used for EXAFS, EPR and resonance Raman data. Phosphate buffers are known to shift downwards in pH by up to 2 pH units upon freezing to 77 K, due to the insolubility of the dibasic salt at low temperature (see: Williams-Smith, D. L., Bray, R. C., Barber, M. J., Tsopanakis, A. D., and Vincent, S. P. Biochem. J. 1977, 167, 593-600). Therefore we measured the pH dependence of the UV/vis spectrum of the WT BSco from pH 2 to pH 10. Only very minor differences in extinction were observed between pH 7 and pH 2, indicating that the structure of the Cu(II) site remains essentially unchanged over this pH range. A plot of the UV/vis spectrum of BSco vs pH is shown as Supporting Information Figure S8.
    • (1977) Biochem. J. , vol.167 , pp. 593-600
    • Williams-Smith, D.L.1    Bray, R.C.2    Barber, M.J.3    Tsopanakis, A.D.4    Vincent, S.P.5


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