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Volumn 68, Issue 18, 2003, Pages 6967-6983

Computational study on mechanistic details of the aminoethanol rearrangement catalyzed by the vitamin B12-dependent ethanolamine ammonia lyase: His and Asp/Glu acting simultaneously as catalytic auxiliaries

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVATION ENTHALPY;

EID: 0042338528     PISSN: 00223263     EISSN: None     Source Type: Journal    
DOI: 10.1021/jo0301705     Document Type: Article
Times cited : (27)

References (71)
  • 1
    • 0042653155 scopus 로고    scopus 로고
    • note
    • The original name of the enzyme was ethanol deaminase (see ref 3), but later it was changed to ethanolamine ammonia lyase (EC 4.3.1.7).
  • 2
    • 0042653158 scopus 로고    scopus 로고
    • note
    • While the actual substrate is 2-aminoethanol, for the sake of shortness, it is abbreviated in the text as aminoethanol.
  • 12
    • 0000244215 scopus 로고
    • Dolphin D., Ed.; Wiley: New York, Chapter 10
    • 12; Dolphin, D., Ed.; Wiley: New York, 1982; Vol. 2, Chapter 10.
    • (1982) 12 , vol.2
    • Babior, B.M.1
  • 46
    • 0042653149 scopus 로고    scopus 로고
    • note
    • The QCISD enthalpies at 298 K were computed as fallows: ΔH (QCISD; 298 K) = ΔH (QCISD; 0 K) + ΔH (B3LYP; 298K) - ΔH (B3LYP; 0 K), where enthalpies at 0 K include the sum of the electronic energy and ZPE corrections scaled by 0.9806.
  • 47
    • 84962348955 scopus 로고    scopus 로고
    • For the sake of shortness, it is the pH of the reaction environment around the enzyme's active site which is meant when the phrase "pH in the active site" is used. For a superb discussion of this and related aspects, see: Barril, X.; Alemán, C.; Orozco, M.; Luque, F. J. Proteins 1998, 32, 67.
    • (1998) Proteins , vol.32 , pp. 67
    • Barril, X.1    Alemán, C.2    Orozco, M.3    Luque, F.J.4
  • 54
    • 0042152088 scopus 로고    scopus 로고
    • note
    • a (Glu) = 4.1, taken from ref 45.
  • 55
    • 0003464216 scopus 로고    scopus 로고
    • Linstrom P.J., Mallard W.G., Eds.; Nist Standard Reference Database Number 69; National Institute of Standards and Technology, Gaithersburg, MD, July
    • NIST Chemistry WebBook; Linstrom, P. J., Mallard, W. G., Eds.; NIST Standard Reference Database Number 69; National Institute of Standards and Technology, Gaithersburg, MD, July 2001 (http:// webbook.nist.gov).
    • (2001) NIST Chemistry WebBook
  • 64
    • 0041651183 scopus 로고    scopus 로고
    • note
    • - will not be included due to the very high activation enthalpy associated with the migration pathway.
  • 65
    • 0042152084 scopus 로고    scopus 로고
    • note
    • In ref 8 this type of rearrangement is described as " dissociation-association mechanism".
  • 66
    • 0041651185 scopus 로고    scopus 로고
    • note
    • 2 or, equivalently, calculating the activation enthalpy for the dissociation starting from the conformer in which the H-bond interaction does not exist and adding the energy difference between the two reactant conformers. Here, the latter method was used.
  • 67
    • 0042152083 scopus 로고    scopus 로고
    • note
    • 3) = 204.0 kcal/mol. All data taken from ref 47.
  • 68
    • 0041651184 scopus 로고    scopus 로고
    • note
    • For example, the optimal pH for catalytic activity of related glutamate mutase falls into the range 7.5-8; see ref 28.
  • 69
    • 0037899473 scopus 로고    scopus 로고
    • For recent review articles on this and related topics, see: (a) Banerjee, R. Chem. Rev. 2003, 103, 2083;
    • (2003) Chem. Rev. , vol.103 , pp. 2083
    • Banerjee, R.1
  • 70


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.