Fluorescent GTP-sensing in aqueous solution of physiological pH

Journal of the American Chemical Society

Volumn 126, Issue 29, 2004, Pages 8892-8893

  Kwon, Ji Young ^a   Singh, N Jiten ^b   Kim, Ha Na ^a   Kim, Sook Kyung ^a   Kim, Kwang S ^b   Yoon, Juyoung ^a  

^a Ewha Womans University   (South Korea)

^b Pohang University of Science and Technology (POSTECH)   (South Korea)

Author keywords

[No Author keywords available]

Indexed keywords

ADENOSINE DIPHOSPHATE; ADENOSINE PHOSPHATE; ADENOSINE TRIPHOSPHATE; GUANOSINE TRIPHOSPHATE;

AQUEOUS SOLUTION; ARTICLE; CHELATION; CHEMICAL STRUCTURE; ENERGY; FLUORESCENCE; HYDROGEN BOND; MOLECULAR RECOGNITION; PH; SUPRAMOLECULAR CHEMISTRY;

ADENOSINE TRIPHOSPHATE; ANTHRACENES; FLUORESCENT DYES; GUANOSINE TRIPHOSPHATE; HYDROGEN-ION CONCENTRATION; IMIDAZOLES; KINETICS; MODELS, MOLECULAR; RECEPTORS, DRUG; SOLUTIONS; SPECTROMETRY, FLUORESCENCE; SUBSTRATE SPECIFICITY; WATER;

EID: 3242796555     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0492440     Document Type: Article

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32. - moieties of 1 and the phosphate groups of ATP/GTP) and the π-H interaction term (∼1.5 kcal/mol). The π-H binding energies of 1-GTP and 1-ATP in the gas phase are 3.5 and 2 kcal/mol, respectively. The difference (8.5 kcal/mol) in electrostatic interaction would be almost nullified in the presence of highly polar solvent (water), while the difference in π-H interaction is little affected by solvents. The MP2/6-31G* binding energy difference between the anthracene-guanine and anthracene-adenine in the gas phase and aqueous medium are 1.5 and 1.0 kcal/mol, respectively; the latter is close to the experimental energy difference (1.0 kcal/mol).