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Volumn 132, Issue 28, 2010, Pages 9820-9825

Thymidylate synthase catalyzed H-transfers: Two chapters in one tale

Author keywords

[No Author keywords available]

Indexed keywords

BOND ACTIVATION; C-H BOND CLEAVAGE; CHEMICAL TRANSFORMATIONS; COMPLEX REACTIONS; DONOR-ACCEPTORS; ENZYMATIC REACTION; HYDRIDE TRANSFERS; INTRINSIC KINETICS; OVERALL RATE; PHYSICAL NATURE; RATE LIMITING; TEMPERATURE DEPENDENT; THYMIDYLATE SYNTHASE;

EID: 77954637249     PISSN: 00027863     EISSN: 15205126     Source Type: Journal    
DOI: 10.1021/ja103010b     Document Type: Article
Times cited : (34)

References (58)
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  • 25
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    • The DHA coordinate usually includes tens of atoms, as D and A represent all atoms directly involved in the H-transfer, rather than just the donor atom and acceptor atom of hydrogen
    • The DHA coordinate usually includes tens of atoms, as D and A represent all atoms directly involved in the H-transfer, rather than just the donor atom and acceptor atom of hydrogen.
  • 26
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    • note
    • 1 in Figure 1). This has been discussed in more detail in ref 12.
  • 44
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    • note
    • +).
  • 50
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    • in press (available as Early View online)
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    • Note
    • As a disclaimer to the proposed theme, we wish to point out that the generality of this phenomenon is not yet clear, as only a limited number of enzymes have been studied at this level. Some recent studies have reported temperature-dependent KIEs for the presumed natural substrate under hypothesized physiological conditions [refs 39 and 40 ] and temperature-independent KIEs with one substrate compared with temperature-dependent KIEs with a 15× faster substrate [Pudney et al. J. Am. Chem. Soc. 2009, 131, 17072-17073]. Furthermore, it is not always easy to ensure that the natrual substrates and physiological conditions in vivo are used for the experiments and that the intrinsic KIEs have been fully extracted. Finally, one has to bear in mind that enzymes may not evolve to make the chemical reaction as fast as possible, but to best fit the metabolic needs of the organism.


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