Covalent attachment of fluorescent probes to the X-base of Escherichia coli phenylalanine transfer ribonucleic acid
Year: 1977
Type: article
Abstract: tRNA PheE, coli was labeled with the N-hydroxysuccinimide esters of 1-dimethylaminonaphthalene-5-sulfonyl glycine and N-methylanthranilic acid through reaction with the amino acid moiety of its X-base, whereby yields of 66% and 24%, respectively, were obtained. The purified dimethylaminonaphthalene-sulfonate derivative could not be aminoacylated and was found to be a strong competitive inhibitor of phenylalanine-tRNA synthetase [Ki=8X10(-7) M]. The N-methylanthraniloyl derivative could be charged to an extent of 5% as compared to native tRNA Phe. The fluorescence emission spectra of the derivatives are indicative of a slightly hydrophobic environment for both fluorophores. The results suggest that the integrity of the polar amino acid group of the X-base is required for the maintenance of the biologically active conformation.
Source: Nucleic Acids Research
DOI: 10.1093/nar/4.7.2161
Authors: Peter W. Schiller, Alan N. Schechter
Institution: National Institutes of Health
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W2004357841