BP

GO:0006816

calcium ion transport

The directed movement of calcium (Ca) ions into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore.

IEA

BP

GO:0006937

regulation of muscle contraction

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

IEA

BP

GO:0034220

ion transmembrane transport

A process in which an ion is transported from one side of a membrane to the other by means of some agent such as a transporter or pore.

IMP

BP

GO:0051260

protein homooligomerization

The process of creating protein oligomers, compounds composed of a small number, usually between three and ten, of identical component monomers. Oligomers may be formed by the polymerization of a number of monomers or the depolymerization of a large protein polymer.

IMP

BP

GO:0051560

mitochondrial calcium ion homeostasis

Any process involved in the maintenance of an internal steady state of calcium ions within the cytoplasm of a cell or between mitochondria and their surroundings.

IEA

BP

GO:0097190

apoptotic signaling pathway

A series of molecular signals which triggers the apoptotic death of a cell. The pathway starts with reception of a signal, and ends when the execution phase of apoptosis is triggered.

IEA

CC

GO:0005739

mitochondrion

A semiautonomous, self replicating organelle that occurs in varying numbers, shapes, and sizes in the cytoplasm of virtually all eukaryotic cells. It is notably the site of tissue respiration.

IEA

CC

GO:0005765

lysosomal membrane

The lipid bilayer surrounding the lysosome and separating its contents from the cell cytoplasm.

IDA

CC

GO:0005925

focal adhesion

Small region on the surface of a cell that anchors the cell to the extracellular matrix and that forms a point of termination of actin filaments.

IDA

CC

GO:0016020

membrane

A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.

IDA

CC

GO:0031902

late endosome membrane

The lipid bilayer surrounding a late endosome.

IDA

CC

GO:0042470

melanosome

A tissue-specific, membrane-bounded cytoplasmic organelle within which melanin pigments are synthesized and stored. Melanosomes are synthesized in melanocyte cells.

IEA

CC

GO:0048471

perinuclear region of cytoplasm

Cytoplasm situated near, or occurring around, the nucleus.

IEA

CC

GO:0070062

extracellular exosome

A membrane-bounded vesicle that is released into the extracellular region by fusion of the limiting endosomal membrane of a multivesicular body with the plasma membrane. Extracellular exosomes, also simply called exosomes, have a diameter of about 40-100 nm.

IDA

MF

GO:0005509

calcium ion binding

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

IEA

MF

GO:0005515

protein binding

Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).

IPI

MF

GO:0005525

GTP binding

Interacting selectively and non-covalently with GTP, guanosine triphosphate.

IMP

MF

GO:0005544

calcium-dependent phospholipid binding

Interacting selectively and non-covalently with phospholipids, a class of lipids containing phosphoric acid as a mono- or diester, in the presence of calcium.

IDA

MF

GO:0008289

lipid binding

Interacting selectively and non-covalently with a lipid.

IMP

MF

GO:0015276

ligand-gated ion channel activity

Enables the transmembrane transfer of an ion by a channel that opens when a specific ligand has been bound by the channel complex or one of its constituent parts.

IMP

MF

GO:0015485

cholesterol binding

Interacting selectively and non-covalently with cholesterol (cholest-5-en-3-beta-ol); the principal sterol of vertebrates and the precursor of many steroids, including bile acids and steroid hormones.

IDA

MF

GO:0042803

protein homodimerization activity

Interacting selectively and non-covalently with an identical protein to form a homodimer.

IMP

MF

GO:0048306

calcium-dependent protein binding

Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules), in the presence of calcium.

IPI