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Volumn 105, Issue 19, 2001, Pages 4471-4484

Ab initio evaluation of the free energy surfaces for the general base/acid catalyzed thiolysis of formamide and the hydrolysis of methyl thiolformate: A reference solution reaction for studies of cysteine proteases

Author keywords

[No Author keywords available]

Indexed keywords

ACTIVATION ENERGY; ACYLATION; AMMONIA; CATALYSIS; FREE ENERGY; HYDROLYSIS; MATHEMATICAL MODELS; PHASE TRANSITIONS; QUANTUM THEORY;

EID: 84962407693     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp010279l     Document Type: Article
Times cited : (65)

References (96)
  • 16
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    • Ehrenberg, R., Graslund, A., Nilsson, L., Ed.: Springer-Verlag: New York
    • Warshel, A., In Structure, Dynamics and Functions of Biomolecules; Ehrenberg, R., Graslund, A., Nilsson, L., Ed.: Springer-Verlag: New York, 1987; p 60.
    • (1987) Structure, Dynamics and Functions of Biomolecules , pp. 60
    • Warshel, A.1
  • 33
    • 0041561440 scopus 로고    scopus 로고
    • University of Southern California: Los Angeles
    • Florián, J.; Warshel, A. ChemSol; University of Southern California: Los Angeles, 1998.
    • (1998) ChemSol
    • Florián, J.1    Warshel, A.2
  • 53
    • 0010922186 scopus 로고
    • Gaussian, Inc.: Pittsburgh
    • Gaussian94 (Revision D.2); Gaussian, Inc.: Pittsburgh, 1995.
    • (1995) Gaussian94 (Revision D.2)
  • 54
    • 84962335991 scopus 로고    scopus 로고
    • note
    • relax) and with our PCM/LD model and found no significant differences between these two models. Thus, we believe that our results for the ion-pair region of the reaction surface are sufficiently reliable.
  • 77
    • 84962335982 scopus 로고    scopus 로고
    • note
    • The calculated G2/solvation free energies were -627.684 830 au/-8.1 kcal/mol, and -627.133 110 au/-76.8 kcal/mol for the neutral and anionic TI, respectively.
  • 86
    • 84962353067 scopus 로고    scopus 로고
    • note
    • solv term. Also note that the 11.7 kcal/mol includes 3.9 kcal/mol solvation contribution.
  • 90
    • 84962456734 scopus 로고    scopus 로고
    • note
    • Because a referee of this paper criticized footnote 61 in our previous paper, we would like to here explain hwy we think that the activation entropy of 11.4 kcal/mol reported by Stanton et al. was not obtained by proper calculations. That is, the suggestion that Hermans' approach was used in the entropy calculations of Stanton et al. is problematic. Hermans' approach is a restrain release approach (RRA), whereas Stanton et al. merely assumed arbitrarily the configurational volume in the enzyme and then they used the corresponding force contants in a formula provided by Hermans to obtain the entropy. The point is that the assumed configurational volume directly determines the entropy s the use of Hermanns' formula was unnecessary and does not constitute a RRA calculation.
  • 92
    • 84962405119 scopus 로고    scopus 로고
    • note
    • w


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.