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Volumn 129, Issue 37, 2007, Pages 11642-11652

Rapid three-step cleavage of RNA and DNA model systems promoted by a dinuclear Cu(II) complex in methanol. Energetic origins of the catalytic efficacy

Author keywords

[No Author keywords available]

Indexed keywords

CATALYTIC EFFICACY; ENERGETIC ORIGINS; METHOXIDES;

EID: 35048884731     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja073780l     Document Type: Article
Times cited : (66)

References (47)
  • 1
  • 24
    • 35048839890 scopus 로고    scopus 로고
    • spH is 8.4.
    • spH is 8.4.
  • 35
    • 35048890216 scopus 로고    scopus 로고
    • -1.
    • -1.
  • 36
    • 35048897110 scopus 로고    scopus 로고
    • Equation 1 was obtained from the equations for equilibrium binding and for conservation of mass by using the commercially available MAPLE software, Maple V, release 5; Waterloo Maple Inc, Waterloo, Ontario, Canada
    • Equation 1 was obtained from the equations for equilibrium binding and for conservation of mass by using the commercially available MAPLE software, Maple V, release 5; Waterloo Maple Inc.: Waterloo, Ontario, Canada.
  • 37
    • 35048820608 scopus 로고    scopus 로고
    • Since 1 and 3 react too quickly with methanol in the presence of the catalyst, dibenzyl phosphate was chosen as a nonreactive phosphate for crystal studies.
    • Since 1 and 3 react too quickly with methanol in the presence of the catalyst, dibenzyl phosphate was chosen as a nonreactive phosphate for crystal studies.
  • 44
    • 35048813144 scopus 로고    scopus 로고
    • A referee has suggested that there is good evidence from other studies (see ref 17) with a dinuclear Zn(II) complex (5) in aqueous solution that the binding involves the nonionized form of the catalyst (Zn(II) 2:H2O) and the 2-hydroxy deprotonated dianionic form of HPNPP rather than the Zn(II)2:-OH form of the catalyst and the protonated 2-OH form of HPNPP which we favor on the basis of our studies. While it is true that these two possibilities are kinetically equivalent and cannot be distinguished on the basis of catalytic studies with 5 in water due to its relatively low activity, the available results we have with 2-Cu(II)2:(-OCH3) or 2-Zn(II)2:(-OCH3) reacting with HPNPP in methanol quickly rule out the former possibility. The pKa for deprotonation of the 2-HO group of HPNPP in methanol should be at least as large or greater tha
    • 4 if the dianionic form of the substrate was the active one.
  • 45
    • 35048888154 scopus 로고    scopus 로고
    • -8 M.
    • -8 M.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.