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Volumn 120, Issue 34, 1998, Pages 8767-8776

A multinuclear ENDOR study of the C-cluster in CO dehydrogenase from Clostridium thermoaceticum: Evidence for H(x)O and histidine coordination to the [Fe4S4] center

Author keywords

[No Author keywords available]

Indexed keywords

CARBON MONOXIDE DEHYDROGENASE; FERRIC ION; HISTIDINE; LIGAND;

EID: 0032475404     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja9731480     Document Type: Article
Times cited : (80)

References (79)
  • 1
    • 3543135058 scopus 로고    scopus 로고
    • note
    • m, moderately coupled proton(s); rf, radio frequency; fwhm, full-width at half-maximum height.
  • 10
    • 3543070775 scopus 로고    scopus 로고
    • The C-cluster also has been investigated by resonance Raman spectroscopy (ref 11), but these papers recently have been retracted (ref 12) and so are not discussed here
    • The C-cluster also has been investigated by resonance Raman spectroscopy (ref 11), but these papers recently have been retracted (ref 12) and so are not discussed here.
  • 13
    • 0030662642 scopus 로고    scopus 로고
    • J. Am. Chem. Soc. 1997, 119, 11134.
    • (1997) J. Am. Chem. Soc. , vol.119 , pp. 11134
  • 14
    • 3543119780 scopus 로고    scopus 로고
    • note
    • red1 state.
  • 24
    • 3543117458 scopus 로고    scopus 로고
    • note
    • m′ = -530 mV) and so was rejected by Anderson and Lindahl (ref 19).
  • 28
    • 0028963868 scopus 로고
    • Sauer, K., Ed.; Academic Press: New York
    • DeRose, V. J.; Hoffman, B. M. In Methods in Enzymology; Sauer, K., Ed.; Academic Press: New York, 1995; Vol. 246, pp 554-589.
    • (1995) Methods in Enzymology , vol.246 , pp. 554-589
    • DeRose, V.J.1    Hoffman, B.M.2
  • 44
    • 3543088273 scopus 로고    scopus 로고
    • note
    • In many reported X-band EPR spectra, temperature and power variations have been used to separate the CODH EPR signals on the basis of their different relaxation properties. Under the low-temperature rapid-passage conditions used in this study, all of the species present contribute to the absorption-like EPR envelope. ENDOR spectra at any field value would be the sum of features due to each contributing species in the EPR spectrum.
  • 45
    • 3543150377 scopus 로고    scopus 로고
    • note
    • m, (data not shown),
  • 53
    • 3543110520 scopus 로고    scopus 로고
    • note
    • i = 0.99≈1.
  • 54
    • 0001389357 scopus 로고
    • s. (a) Mulks, C. F.; Scholes, C. P.; Dickinson, L. C.; Lapidot, A. J. Am. Chem. Soc. 1979, 101, 1645-1653. (b) LoBrutto, R.; Scholes, C. P.; Wagner, G. C.; Gunsalus, I. C.; Debrunner, P. G. J. Am. Chem. Soc. 1980, 102, 1167-1170.
    • (1979) J. Am. Chem. Soc. , vol.101 , pp. 1645-1653
    • Mulks, C.F.1    Scholes, C.P.2    Dickinson, L.C.3    Lapidot, A.4
  • 57
    • 3543128001 scopus 로고    scopus 로고
    • note
    • 14N in the two states.
  • 63
    • 3543060261 scopus 로고    scopus 로고
    • note
    • 14N Δm = ±2 "double quantum" transitions previously observed by Q-band ENDOR for other Fe-S centers that lack direct nitrogen ligands (ref 49).
  • 72
    • 3543122084 scopus 로고    scopus 로고
    • note
    • 4 center of the C-cluster. Bridging two metals seems less likely for hydroxide that is involved in catalysis as a nucleophile, but it is possible that the status of the bridging ligand changes, for example by CO binding, during catalysis.
  • 74
    • 3543142087 scopus 로고    scopus 로고
    • note
    • Mt. Their conclusion was based on a previous study in which preparations of the isolated αε dimer (called the Ni/Fe-S component) exhibited the NiFeC EPR signal of CO-reduced A-cluster (ref 61c). However, the quantified NiFeC signal intensity in their samples was only ∼1/6 that exhibited by the intact complex, raising the possibility that their samples contained a small amount of intact complex and that it was this complex that gave rise to the signal.
  • 77
    • 3543139758 scopus 로고    scopus 로고
    • note
    • 2: while the other bound one of the oxygen atoms. This arrangement dramatically enhanced the rate of catalysis relative to the corresponding mononuclear complex.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.