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Myosin is one of three major classes of molecular motors: myosin, dynein, and kinesin. As the most abundant of these proteins myosin plays a structural and enzymatic role in muscle contraction and intracellular motility.
Myosin is one of three major classes of molecular motors: myosin, dynein, and kinesin. As the most abundant of these proteins myosin plays a structural and enzymatic role in muscle contraction and intracellular motility.
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{{STRUCTURE_2mys| PDB=2mys| Scene =Sandbox_171/Newscene/1'>active site }}
 
===Structure===
===Structure===
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===Function===
===Function===
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{{STRUCTURE_2mys| PDB=2mys| Scene =Sandbox_171/Newscene/1'>active site }}
===Literature Cited===
===Literature Cited===
<references/>
<references/>

Revision as of 03:37, 1 April 2010

Myosin is one of three major classes of molecular motors: myosin, dynein, and kinesin. As the most abundant of these proteins myosin plays a structural and enzymatic role in muscle contraction and intracellular motility.

Structure

Myosin has a molecular size of approximately 520 kilodaltons, with two 220 kD heavy chains and two pairs of light chains which vary in size. [1] The molecule is asymmetric, having a long tail and two globular heads. [1] The heavy chains each constitute a globular head. [1]

Myosin head
Myosin head

Function

Please do NOT make changes to this Sandbox until after April 23, 2010. Sandboxes 151-200 are reserved until then for use by the Chemistry 307 class at UNBC taught by Prof. Andrea Gorrell.

PDB ID 2mys

Drag the structure with the mouse to rotate
2mys, resolution 2.80Å ()
Ligands: ,
Non-Standard Residues:
Resources: FirstGlance, OCA, PDBsum, RCSB
Coordinates: save as pdb, mmCIF, xml



Literature Cited

  1. ↑ 1.0 1.1 1.2 Rayment I, Rypniewski WR, Schmidt-Base K, Smith R, Tomchick DR, Benning MM, Winkelmann DA, Wesenberg G, Holden HM. Three-dimensional structure of myosin subfragment-1: a molecular motor. Science. 1993 Jul 2;261(5117):50-8. PMID:8316857
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