23262-07-9Relevant articles and documents
Interaction of VIVO, VVO2 and CuII with a peptide analogue SalGly-L-Ala
Jakusch, Tamas,Doernyei, Agnes,Correia, Isabel,Rodrigues, Ligia M.,Toth, Gabor K.,Kiss, Tamas,Costa Pessoa, Joao,Marcao, Susana
, p. 2113 - 2122 (2007/10/03)
The formation of complexes of a tripeptide analogue, salicylglycyl-L-alanine [HOC6H4C(O)NHCH2C(O)NHCH(CH3) -COOH, H2SalGly-L-Ala], was studied with CuII, VIVO and VVO2 in aqueous solution using pH-potentiometric and spectroscopic (UV/Vis, CD, EPR and 51V NMR) techniques. The results demonstrated the ambidentate character of the ligand. The metal ion-induced deprotonation and subsequent coordination of the two neighbouring amide groups was shown to occur in a cooperative way in the pH range 5-6. At pH ≈ 6.5 a complex with an (O-, 2 x CON-, COO-) binding set becomes predominant for both CuII, and VIVO. The affinity of the phenolate-O- for VIVO is high and the ligand is bound to this metal ion even at pH values greater than 10. Conversely, the affinity for VVO2 is significantly lower and no interaction between this metal oxo-ion and the ligand could be detected in the pH range 2-12. In contrast, with the dipeptide analogue H2SalGly, chelation involving the deprotonated amide-N-could be unambiguously detected. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003.
Biomimetic studies using artificial systems. IV. Biomimetic peptide synthesis by using multifunctionalized crown ethers as a novel enzyme model. A new concept in mimicking of enzyme-catalyzed bond-forming reactions.
Sasaki,Koga
, p. 912 - 919 (2007/10/02)
A novel approach to the mimicking of enzyme-catalyzed bond-forming reactions has been examined using multifunctionalized chiral crown ethers. In addition to the 18-crown-6 moiety as a binding site, the host have one thiol and one thio ester with an N-prot
Rate constants for peptide p-nitrophenyl ester coupling reactions in dimethylformamide. A model for steric interactions in the peptide bond forming transition state.
Kemp,Choong,Pekaar
, p. 3841 - 3847 (2007/10/12)
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