Myosin VI dimerization triggers an unfolding of a three-helix bundle in order to extend its reach.
Myosin VI dimerization triggers an unfolding of a three-helix bundle in order to extend its reach.
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DOI:
10.1016/j.molcel.2009.07.010
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发表时间:
2009-08-14
期刊:
影响因子:
16
通讯作者:
Sweeney, H. Lee
中科院分区:
文献类型:
--
作者:
Mukherjea, Monalisa;Llinas, Paola;Kim, HyeongJun;Travaglia, Mirko;Safer, Daniel;Menetrey, Julie;Franzini-Armstrong, Clara;Selvin, Paul R.;Houdusse, Anne;Sweeney, H. Lee
Myosin VI challenges the prevailing theory of how myosin motors move on actin: the lever arm hypothesis. While the reverse directionality and large powerstroke of myosin VI can be attributed to unusual properties of a subdomain of the motor (converter with a unique insert), these adaptations cannot account for the large step size on actin. Either the lever arm hypothesis needs modification, or myosin VI has some unique form of extension of its lever arm. We determined the structure of the region immediately distal to the lever arm of the motor and show that it is a 3-helix bundle. Based on C-terminal truncations that display the normal range of step sizes on actin, CD, fluorescence studies, and a partial deletion of the bundle, we demonstrate that this bundle unfolds upon dimerization of two myosin VI monomers. This unprecedented mechanism generates an extension of the lever arm of myosin VI.
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DOI:
10.1098/rstb.2004.1566
发表时间:
2004-12-29
期刊:
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子:
--
作者:
Holmes, KC;Schröder, RR;Houdusse, A
通讯作者:
Houdusse, A
DOI:
10.1083/jcb.200308020
发表时间:
2003-11-24
期刊:
The Journal of cell biology
影响因子:
--
作者:
Al-Bassam J;Cui Y;Klopfenstein D;Carragher BO;Vale RD;Milligan RA
通讯作者:
Milligan RA
DOI:
10.1107/s0907444905036693
发表时间:
2006-01-01
影响因子:
2.2
作者:
Evans, P
通讯作者:
Evans, P
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
3.4
作者:
Aitken, Colin Echeverria;Marshall, R. Andrew;Puglisi, Joseph D.
通讯作者:
Puglisi, Joseph D.