1b7t
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| , resolution 2.5Å | |||||||
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| Ligands: | , and | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
MYOSIN DIGESTED BY PAPAIN
OverviewOverview
The crystal structure of a proteolytic subfragment from scallop striated muscle myosin, complexed with MgADP, has been solved at 2.5 A resolution and reveals an unusual conformation of the myosin head. The converter and the lever arm are in very different positions from those in either the pre-power stroke or near-rigor state structures; moreover, in contrast to these structures, the SH1 helix is seen to be unwound. Here we compare the overall organization of the myosin head in these three states and show how the conformation of three flexible "joints" produces rearrangements of the four major subdomains in the myosin head with different bound nucleotides. We believe that this novel structure represents one of the prehydrolysis ("ATP") states of the contractile cycle in which the myosin heads stay detached from actin.
About this StructureAbout this Structure
1B7T is a Protein complex structure of sequences from Argopecten irradians. The following page contains interesting information on the relation of 1B7T with [Myosin]. Full crystallographic information is available from OCA.
ReferenceReference
Atomic structure of scallop myosin subfragment S1 complexed with MgADP: a novel conformation of the myosin head., Houdusse A, Kalabokis VN, Himmel D, Szent-Gyorgyi AG, Cohen C, Cell. 1999 May 14;97(4):459-70. PMID:10338210
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