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Volumn 124, Issue 38, 2002, Pages 11295-11306

Environmental effects on phosphoryl group bonding probed by vibrational spectroscopy: Implications for understanding phosphoryl transfer and enzymatic catalysis

Author keywords

[No Author keywords available]

Indexed keywords

BIOLOGICAL SUBSTRATES;

EID: 0037174379     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja026481z     Document Type: Article
Times cited : (48)

References (78)
  • 22
    • 2142758924 scopus 로고    scopus 로고
    • note
    • s, symmetric stretch frequency.
  • 37
    • 2142643943 scopus 로고    scopus 로고
    • note
    • 15
  • 48
    • 2142754714 scopus 로고    scopus 로고
    • note
    • We use a simplified model to understand stabilization of the leaving group alkoxide ion substituent. Several studies have suggested that substituents in nonconjugated systems exert their effects predominantly through space rather than through the bonded chain (see, for example, ref 25 and references therein), so that consideration of substituents as attached dipoles, as in Scheme 1, may provide a reasonable representation. This approximation is useful conceptually for the treatment presented in the text. but it is not required for the conclusions that are drawn. For instance, for conjugated systems, resonance effects are likely important.
  • 52
    • 2142753319 scopus 로고    scopus 로고
    • note
    • 2) = 16.8 kcal/mol (at 298 K).
  • 56
    • 2142770523 scopus 로고    scopus 로고
    • note
    • The free-energy reaction profile is grossly simplified, with only one coordinate depicting the reaction progress.
  • 57
    • 2142817416 scopus 로고    scopus 로고
    • note
    • The attached alkyl group of the phosphate ester is ignored in this treatment. This is because the phosphate ester can vary in differential solubility in water versus DMSO depending on the alkyl group used, but this alkyl chain is, to a reasonable approximation, unchanged in going from the ground state to the transition state. As we are focused on reactivity, we do not consider this portion of the phosphate ester.
  • 60
    • 2142828795 scopus 로고    scopus 로고
    • note
    • 2) = 20.6 kcal/mol (at 298 K).
  • 68
    • 0003466067 scopus 로고
    • Dolphin, D., Poulson, R., Avramovic, O., Eds.; John Wiley & Sons: New York
    • Palcic, M. M.; Floss, H. G. In Vitamin B6 Pyridoxal Phosphate; Dolphin, D., Poulson, R., Avramovic, O., Eds.; John Wiley & Sons: New York, 1986; p 25.
    • (1986) Vitamin B6 Pyridoxal Phosphate , pp. 25
    • Palcic, M.M.1    Floss, H.G.2
  • 74
    • 0004192250 scopus 로고
    • John Wiley & Sons: New York
    • Solomons, T. W. G. In Organic Chemistry: John Wiley & Sons: New York, 1988; p 655.
    • (1988) Organic Chemistry , pp. 655
    • Solomons, T.W.G.1
  • 77
    • 2142652398 scopus 로고    scopus 로고
    • note
    • (a) Trifluoroethyl phosphate was also an outlier in a previous linear freeenergy relationship of a series of alkyl phosphates (see ref 44b and references therein).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.