메뉴 건너뛰기




Volumn 118, Issue 47, 1996, Pages 11745-11751

How important are quantum mechanical nuclear motions in enzyme catalysis?

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; CATALYSIS; ENZYME ACTIVITY; QUANTUM CHEMISTRY;

EID: 0029951263     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja962007f     Document Type: Article
Times cited : (200)

References (61)
  • 2
    • 0024298964 scopus 로고
    • Kraut, J. Science 1988, 248, 533.
    • (1988) Science , vol.248 , pp. 533
    • Kraut, J.1
  • 26
    • 10544256353 scopus 로고    scopus 로고
    • note
    • 20 However the elegant proposal of ref 20 was developed for ground state partition functions and not for calculations of rate constants by centroid approaches. Furthermore, our approach and the work described in ref 14b have introduced the use of FEP/umbrella sampling methods to path integral centroid calculations of rate constants. We consider this to be quite useful and like to point out that many works in this field developed effective simulation approaches for implementation of the original idea of Feynman, rather than invented a new quantum mechanical concept.
  • 30
    • 10544235203 scopus 로고    scopus 로고
    • note
    • 40 that the EVB potential surface correctly reproduces the corresponding ab initio surfaces.
  • 48
    • 10544229953 scopus 로고    scopus 로고
    • note
    • The reliability and convergence of FEP calculation in proteins is a rather complex issue. Usual convergence tests, such as forward and backward integration, are not always informative or even appropriate as far as overall accuracy is concerned. An important point to remember in the error analysis is to be consistent with the methodology used to parametrize the model. We and others have invested considerable effort addressing these issues (e.g. refs 33 and 35) and concluded that a useful estimate of the actual error range can be obtained by running a set of simulations with different initial conditions. By this definition we have an error range of about 2 kcal/mol in the absolute value of the activation free energy. The error in the activation free energy difference between D and H transfer reactions is around 0.20 kcal/mol which corresponds to an error range of about ±1.0 in the corresponding isotope effect.
  • 49
    • 10544227474 scopus 로고    scopus 로고
    • note
    • Some readers might confuse the many force field parameters of eq 8 with empirical parameters that allow one to adjust the calculated rate constant to any desirable value. However, while our approach refines parameters by reproducing properties of molecules in solution (as is done by all current approaches), it does not allow any of these parameters to change when calculating the difference between the energy of the given reaction in the protein active site and in water.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.