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Volumn 41, Issue 19, 2002, Pages 3638-3641

A trigonal-bipyramidal ferric aqua complex with a sterically hindered salen ligand as a model for the active site of protocatechuate 3,4-dioxygenase

Author keywords

Bioinorganic chemistry; Enzyme models; Iron; Metalloenzymes; Schiff bases

Indexed keywords

SPECTRUM ANALYSIS;

EID: 0037020379     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3773(20021004)41:19<3638::aid-anie3638>3.0.co;2-%23     Document Type: Article
Times cited : (62)

References (17)
  • 6
    • 85184368979 scopus 로고    scopus 로고
    • note
    • Kα radiation (λ = 0.71069 Å). The structures were solved by direct methods with the teXsan crystallographic software package from the Molecular Structure Corporation. Hydrogen atoms, except for those of water molecules, were placed at calculated positions and refined with isotropic parameters. The final cycles of full-matrix least-squares refinement were based on 13297 (2) and 13356 (3) observed reflections (all data) and 1398 (2) and 803 (3) variable parameters, respectively, CCDC-179137 (2) and CCDC-179138 (3) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge via www.ccdc.cam.ac.uk/conts/retrieving.html (or from the Cambridge Crystallographic Data Centre, 12, Union Road, Cambridge CB21EZ, UK; fax: (+44)1223-336-033; or deposit @ccdc.cam.ac.uk).
  • 13
    • 0034636805 scopus 로고    scopus 로고
    • The iron-bound hydroxide ligand in 3,4-PCD is protonated to an aqua ligand around pH 6.0 with binding of sulfate ion to the iron: M. W. Vetting, D. A. Argenio, L. N. Ornston, D. H. Ohlendorf, Biochemistry 2000, 39, 7943-7955.
    • (2000) Biochemistry , vol.39 , pp. 7943-7955
    • Vetting, M.W.1    Argenio, D.A.2    Ornston, L.N.3    Ohlendorf, D.H.4
  • 15
    • 85184367240 scopus 로고    scopus 로고
    • note
    • 2 at 296 K. This is due to a fast exchange between two fluxional isomers resulting from pseudorotation of the salen ligand 1; extreme line broadening has been observed at low temperature.
  • 16
    • 85184380884 scopus 로고    scopus 로고
    • note
    • The EPR spectrum of 2 showed other ferric high-spin signals at g = 6.7, 5.2, and ca. 2. This indicates a more axial iron center (E/D∼0.03), which is probably a six-coordinated form resulting from binding of ethanol to 2 at 4 K.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.