Study on the Interaction between 3, 5-Dinitrobenzoic Acid and Bovine Serum Albumin by Fluorescence Spectroscopic Method

Abstract:

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The interaction between 3, 5-dinitrobenzoic acid and bovine serum albumin (BSA) was studied by the method of fluorescence spectroscopy. By the analysis of fluorescence spectra and fluorescence intensity, it was observed that the 3, 5-dinitrobenzoic acid had a strong ability to quench the intrinsic fluorescence of BSA through static quenching process. Based on fluorescence quenching results, the apparent binding constant (K) between 3, 5-dinitrobenzoic acid and BSA was 7.08×106 and the number of binding sites (n) was 1.5 at 298 K. The distance (r) between donor (BSA) and acceptor (3, 5-dinitrobenzoic) was 4.17 nm according to the Förster’s theory of non-radiation energy transfer. The negative △H and △S in case of 3,5-dinitrobenzoic acid-BSA complex showed that hydrogen bonds and van der Waals force played a significant role in the binding of 3,5-dinitrobenzoic acid to BSA. The synchronous fluorescence spectra revealed that 3, 5-dinitrobenzoic acid induced conformational change of BSA.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

113-116

DOI:

10.4028/www.scientific.net/AMR.233-235.113

Citation:

X. Y. Cao et al., "Study on the Interaction between 3, 5-Dinitrobenzoic Acid and Bovine Serum Albumin by Fluorescence Spectroscopic Method", Advanced Materials Research, Vols. 233-235, pp. 113-116, 2011

Online since:

May 2011

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Price:

$35.00

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