Selection of heptapeptides that bind helix 69 of bacterial 23S ribosomal RNA.
Bioorg Med Chem
; 21(5): 1240-7, 2013 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-23375098
ABSTRACT
Helix 69 of Escherichia coli 23S rRNA has important roles in specific steps of translation, such as subunit association, translocation, and ribosome recycling. An M13 phage library was used to identify peptide ligands with affinity for helix 69. One selected sequence, NQVANHQ, was shown through a bead assay to interact with helix 69. Electrospray ionization mass spectroscopy revealed an apparent dissociation constant for the amidated peptide and helix 69 in the low micromolar range. This value is comparable to that of aminoglycoside antibiotics binding to the A site of 16S rRNA or helix 69. Helix 69 variants (human) and unrelated RNAs (helix 31 or A site of 16S rRNA) showed two- to fourfold lower affinity for NQVANHQ-NH(2). These results suggest that the peptide has desirable features for development as a lead compound for novel antimicrobials.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Peptídeos
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RNA Ribossômico 23S
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Anti-Infecciosos
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article