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Default A hairpin-loop conformation in tandem repeat sequence of the ice nucleation protein r

A hairpin-loop conformation in tandem repeat sequence of the ice nucleation protein revealed by NMR spectroscopy.

Related Articles A hairpin-loop conformation in tandem repeat sequence of the ice nucleation protein revealed by NMR spectroscopy.

FEBS Lett. 1997 Jun 9;409(2):227-31

Authors: Tsuda S, Ito A, Matsushima N

The 1H-NMR spectrum of a synthetic 24-residue peptide (A1-G-V-D-S-S-L-I-A-G-Y-G-S-T-Q-T-S-G-S-D-S-A-L-T24; INP24), comprising three repeats of the 8-residue consensus sequence of Pseudomonas syringae ice nucleation protein, was fully assigned using 2-dimensional (2D) NMR spectroscopy at 4 degrees C and 30 degrees C. Close proximity of the aliphatic protons between Leu7, Ile8, Ala9, and the ring-protons of Tyr11 was indicated from the observation of the inter-molecular nuclear Overhauser enhancement (NOE) effect. Hydrogen-bonding was strongly suggested for the NH group of Leu7 from its extremely low-temperature coefficient estimated from the temperature dependence of the chemical shift. These results indicate the formation of a hairpin-loop conformation constructed by a hexapeptide segment of INP24, -Leu7-Ile8-Ala9-Gly10-Tyr11-Gly12.

PMID: 9202151 [PubMed - indexed for MEDLINE]



Source: PubMed
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