BP

GO:0006936

muscle contraction

A process in which force is generated within muscle tissue, resulting in a change in muscle geometry. Force generation involves a chemo-mechanical energy conversion step that is carried out by the actin/myosin complex activity, which generates force through ATP hydrolysis.

TAS

BP

GO:0006937

regulation of muscle contraction

Any process that modulates the frequency, rate or extent of muscle contraction.

TAS

BP

GO:0070527

platelet aggregation

The adhesion of one platelet to one or more other platelets via adhesion molecules.

IMP

CC

GO:0001725

stress fiber

A contractile actin filament bundle that consists of short actin filaments with alternating polarity, cross-linked by alpha-actinin and possibly other actin bundling proteins, and with myosin present in a periodic distribution along the fiber.

IEA

CC

GO:0005829

cytosol

The part of the cytoplasm that does not contain organelles but which does contain other particulate matter, such as protein complexes.

TAS

CC

GO:0005859

muscle myosin complex

A filament of myosin found in a muscle cell of any type.

TAS

CC

GO:0030018

Z disc

Platelike region of a muscle sarcomere to which the plus ends of actin filaments are attached.

IEA

MF

GO:0005509

calcium ion binding

Interacting selectively and non-covalently with calcium ions (Ca2+).

IEA

MF

GO:0008307

structural constituent of muscle

The action of a molecule that contributes to the structural integrity of a muscle fiber.

TAS

MF

GO:0032036

myosin heavy chain binding

Interacting selectively and non-covalently with a heavy chain of a myosin complex.

IEA