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Volumn 10, Issue 11, 2004, Pages 2781-2788

Computational investigation of hydrogen abstraction from 2-aminoethanol by the 1,5-dideoxyribose-5-yl radical: A model study of a reaction occurring in the active site of ethanolamine ammonia lyase

Author keywords

Ab initio calculations; Coenzyme B12; Density functional calculations; Lyases radical reactions

Indexed keywords

ACTIVATION ANALYSIS; ALCOHOLS; CHEMICAL BONDS; ENTHALPY; MATHEMATICAL MODELS; SUBSTRATES;

EID: 3042536077     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200305773     Document Type: Article
Times cited : (11)

References (80)
  • 1
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    • f) J. Rétey, Angew. Chem. 1990, 102, 373; Angew. Chem. Int. Ed. Engl. 1990, 29, 355;
    • (1990) Angew. Chem. , vol.102 , pp. 373
    • Rétey, J.1
  • 12
    • 0025230340 scopus 로고
    • f) J. Rétey, Angew. Chem. 1990, 102, 373; Angew. Chem. Int. Ed. Engl. 1990, 29, 355;
    • (1990) Angew. Chem. Int. Ed. Engl. , vol.29 , pp. 355
  • 14
    • 3042662934 scopus 로고    scopus 로고
    • note
    • The original name of the enzyme was ethanol deaminase (see ref. [6]) but it was later changed to ethanolamine ammonia lyase (EC 4.3.1.7).
  • 15
    • 3042523512 scopus 로고    scopus 로고
    • note
    • While the actual substrate is 2-aminoethanol, it will abbreviated as aminoethanol in the remainder of the text for the sake of brevity.
  • 22
    • 84855620601 scopus 로고
    • (Ed.: D. Dolphin), Wiley, New York
    • 12 Vol. 2 (Ed.: D. Dolphin), Wiley, New York, 1982.
    • (1982) 12 , vol.2
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    • c) Y. Zhao, P. Such, J. Rétey, Angew. Chem. 1992, 104, 212; Angew. Chem. Int. Ed. Engl. 1992, 31, 215.
    • (1992) Angew. Chem. Int. Ed. Engl. , vol.31 , pp. 215
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    • 84855620601 scopus 로고
    • (Ed.: D. Dolphin), Wiley, New York
    • 12, Vol. 1 (Ed.: D. Dolphin), Wiley, New York, 1982;
    • (1982) 12 , vol.1
    • Babior, B.M.1
  • 54
  • 62
    • 3042616377 scopus 로고    scopus 로고
    • note
    • The enthalpies at 298 K were computed as follows: ΔH (MP2/6-311++G**; 298 K) = ΔH (MP2/6-311++G**; 0 K)+ΔH (B3LYP/ 6-31G*; 298 K)-ΔH (B3LYP/6-31G*; 0 K), where enthalpies at 0 K include the sum of the electronic energy and ZPE corrections scaled by 0.9806.
  • 66
    • 0035903592 scopus 로고    scopus 로고
    • b) K. Gruber, R. Reitzer, C. Kratky, Angew. Chem. 2001, 113, 3481; Angew. Chem. Int. Ed. 2001, 40, 3377;
    • (2001) Angew. Chem. Int. Ed. , vol.40 , pp. 3377
  • 69
    • 3042523581 scopus 로고    scopus 로고
    • note
    • While the correct name for the model employed is (2S,3R,4S)-2-methyl-3,4- dihydroxytetrahydrofurane, we will use an abbreviated version derived from the structurally related ribose, that is, 1,5-dideoxyribose. For details concerning the configurations at the C2, C3, and C4 centers (as well as the numbering of the atoms) and the nature of the intramolecular hydrogen bond between the two OH groups, see Scheme 3c.
  • 70
    • 3042616186 scopus 로고    scopus 로고
    • note
    • 2; Table 1); these are slightly less stable (each 0.2 kcal mol) than the separate species 2 and 1,5-dideoxyribose (C3- or C2-endo conformers).
  • 71
    • 3042663059 scopus 로고    scopus 로고
    • note
    • Only those TSs involving the C3-endo conformer of the 1,5-dideoxyribose are depicted in Figure 2 because of the pronounced structural similarities between the TSs for the reactions with the C3- and C2-endo conformers.
  • 72
    • 3042523580 scopus 로고    scopus 로고
    • note
    • 2 in the direction of a product did not converge into a complex, but because of otherwise strong similarities between the two conformers involved in this reaction, such a complex might be postulated to exist. Since our main interest concerns the barriers to the hydrogen abstractions, we refrained from an exhaustive search for this kind of product complex.
  • 80
    • 3042528488 scopus 로고    scopus 로고
    • note
    • 2 in the direction of a product, the IRC computations did not converge into a complex. See also ref. [41].


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.