Myosins

A diverse superfamily of proteins that function as translocating proteins. They share the common characteristics of being able to bind ACTINS and hydrolyze MgATP. Myosins generally consist of heavy chains which are involved in locomotion, and light chains which are involved in regulation. Within the structure of myosin heavy chain are three domains: the head, the neck and the tail. The head region of the heavy chain contains the actin binding domain and MgATPase domain which provides energy for locomotion. The neck region is involved in binding the light-chains. The tail region provides the anchoring point that maintains the position of the heavy chain. The superfamily of myosins is organized into structural classes based upon the type and arrangement of the subunits they contain.

Also Known As:

Myosin; Myosin ATPase; ATPase, Actin-Activated; ATPase, Actomyosin; ATPase, Myosin; Actin-Activated ATPase; Actomyosin ATPase; Actomyosin Adenosinetriphosphatase; Adenosine Triphosphatase, Myosin; Adenosinetriphosphatase, Actomyosin; Adenosinetriphosphatase, Myosin; Myosin Adenosinetriphosphatase; ATPase, Actin Activated; Actin Activated ATPase; Myosin Adenosine Triphosphatase

Macromolecular Substances: 97
- Polymers: 13529
  - Biopolymers: 836
    - Microfilament Proteins: 501
      - Myosins: 2992
Enzymes and Coenzymes: 1
- Enzymes: 155591
  - Hydrolases: 2206
    - Acid Anhydride Hydrolases
      - Adenosine Triphosphatases: 8727
        Molecular Motor Proteins: 16
        Myosins: 2992
Amino Acids, Peptides, and Proteins: 1
- Proteins: 496323
  - Cytoskeletal Proteins: 743
    - Microfilament Proteins: 501
      - Myosins: 2992
  - Contractile Proteins: 703
    - Muscle Proteins: 1603
      - Myosins: 2992

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