Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR.

Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR. Research Abstract Details 

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Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR. Abstract Text:

Masafumi D Yamada,Shinsaku Maruta,Satoshi Yasuda,Kazunori Kondo,Hidekatsu Maeda,Toshiaki Arata,Masafumi D Yamada,Shinsaku Maruta,Satoshi Yasuda,Kazunori Kondo,Hidekatsu Maeda,Toshiaki Arata,

The EPR spectra of the spin labels attached to loops L11 and L12 of kinesin were resolved into slow (rotational correlation time, tau=10-45 ns) and fast (tau=2 ns) components. The fraction of the slow component increased considerably when kinesin was complexed with a microtubule (MT). On MT binding and in the presence of nucleotides ADP and AMPPNP, the spin labels on L11, particularly at A252C and L249C, significantly decreased the fraction of the slow component. Moreover, dipolar EPR detected a wide distribution in distance range, 1-2 nm between the two spin labels attached to T242C/A252C or A247C/A252C; this distribution was slightly narrower in the presence of MTs than in their absence. These results suggested that the L11 residues undergo conformational transition on the binding of nucleotides and MT, while these residues remained to fluctuate over a nanometer range.

Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR. Publishing Authors By Initials

MD Yamada,S Maruta,S Yasuda,K Kondo,H Maeda,T Arata,MD Yamada,S Maruta,S Yasuda,K Kondo,H Maeda,T Arata,

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Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Biochemical and biophysical research communication

VOLUME: 364

Page Numbers: 620-6

Journal Abbreviation: Biochem. Biophys. Res. Commun.

ISSN: 1090-2104

DAY: 16

MONTH: 10

YEAR: 2007

Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR. Information

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LANGUAGE: eng

NlmUniqueID: 372516

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Grant and Affiliation Information for Conformational dynamics of loops L11 and L12 of kinesin as revealed by spin-labeling EPR.

AFFILIATION: Division of Bioengineering, Graduate School of Engineering, Soka University, Hachioji, Tokyo 192-8577, Japan.

Country: United States

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MEDLINETA: Biochem Biophys Res Commun

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