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© Research
Publication : European journal of biochemistry / FEBS

31P NMR analysis of the DNA conformation induced by protein binding SRY/DNA complexes

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in European journal of biochemistry / FEBS - 01 Feb 2000

Castagné C, Murphy EC, Gronenborn AM, Delepierre M

Link to Pubmed [PMID] – 10672034

Eur. J. Biochem. 2000 Feb;267(4):1223-9

Complexes of the HMG box protein SRY with two duplexes of 8 and 14 base pairs have been studied by 31P NMR and complete assignment of all phosphorus signals of the bound DNA duplexes are presented. While for the free DNA, all 31P signals display limited spectral dispersion (< 0.8 p.p.m.) for the bound duplexes, 31P resonances are spread over 2 p.p.m. Based on the previously published 3D structure of hSRY-HMG, with the 8 mer it is demonstrated that the upfield shifted resonances correspond to the site of partial intercalation of an isoleucine side chain into the DNA. Moreover, the observation of significant difference in linewidths between the two duplexes allows to estimate lifetime of the complexes from 31P-31P 2D exchange experiments.

http://www.ncbi.nlm.nih.gov/pubmed/10672034