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Old 11-17-2010, 11:15 PM
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Default Identification of slow motions in the reduced recombinant high-potential iron sulfur

Identification of slow motions in the reduced recombinant high-potential iron sulfur protein I (HiPIP I) from Ectothiorhodospira halophila via 15N rotating-frame NMR relaxation measurements.

Related Articles Identification of slow motions in the reduced recombinant high-potential iron sulfur protein I (HiPIP I) from Ectothiorhodospira halophila via 15N rotating-frame NMR relaxation measurements.

J Biomol NMR. 1998 Aug;12(2):307-18

Authors: Banci L, Felli IC, Koulougliotis D

Rotating-frame 15N relaxation rate (R1 rho) NMR experiments have been performed in order to study the dynamic behavior of the reduced recombinant high-potential iron-sulfur protein iso I (HiPIP I) from Ectothiorhodospira halophila, in the microsecond to ms time range. Measurements of R1 rho were performed as a function of the effective spinlock magnetic field amplitude by using both on and off-resonance radio frequency irradiation. The two data sets provided consistent results and were fit globally in order to identify possible exchange processes in an external loop of the reduced HiPIP I. The loop consists of residues 43-45 and the correlation time of the exchange process was determined to be 50 +/- 8 microseconds for the backbone nitrogen of Gln 44.

PMID: 9752001 [PubMed - indexed for MEDLINE]



Source: PubMed
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