BP

GO:0006955

immune response

Any immune system process that functions in the calibrated response of an organism to a potential internal or invasive threat.

TAS

BP

GO:0007067

mitotic nuclear division

A cell cycle process comprising the steps by which the nucleus of a eukaryotic cell divides; the process involves condensation of chromosomal DNA into a highly compacted form. Canonically, mitosis produces two daughter nuclei whose chromosome complement is identical to that of the mother cell.

IMP

BP

GO:0007165

signal transduction

The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.

TAS

BP

GO:0007166

cell surface receptor signaling pathway

A series of molecular signals initiated by activation of a receptor on the surface of a cell. The pathway begins with binding of an extracellular ligand to a cell surface receptor, or for receptors that signal in the absence of a ligand, by ligand-withdrawal or the activity of a constitutively active receptor. The pathway ends with regulation of a downstream cellular process, e.g. transcription.

TAS

BP

GO:0007264

small GTPase mediated signal transduction

Any series of molecular signals in which a small monomeric GTPase relays one or more of the signals.

IEA

BP

GO:0051276

chromosome organization

A process that is carried out at the cellular level that results in the assembly, arrangement of constituent parts, or disassembly of chromosomes, structures composed of a very long molecule of DNA and associated proteins that carries hereditary information. This term covers covalent modifications at the molecular level as well as spatial relationships among the major components of a chromosome.

IMP

BP

GO:0051310

metaphase plate congression

The alignment of chromosomes at the metaphase plate (spindle equator), a plane halfway between the poles of the spindle.

IMP

CC

GO:0005634

nucleus

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.

IEA

CC

GO:0009898

cytoplasmic side of plasma membrane

The leaflet the plasma membrane that faces the cytoplasm and any proteins embedded or anchored in it or attached to its surface.

IDA

CC

GO:0030496

midbody

A thin cytoplasmic bridge formed between daughter cells at the end of cytokinesis. The midbody forms where the contractile ring constricts, and may persist for some time before finally breaking to complete cytokinesis.

IDA

CC

GO:0051233

spindle midzone

The area in the center of the spindle where the spindle microtubules from opposite poles overlap.

IDA

CC

GO:0072686

mitotic spindle

A spindle that forms as part of mitosis. Mitotic and meiotic spindles contain distinctive complements of proteins associated with microtubules.

IDA

MF

GO:0000287

magnesium ion binding

Interacting selectively and non-covalently with magnesium (Mg) ions.

IDA

MF

GO:0003924

GTPase activity

Catalysis of the reaction: GTP + H2O = GDP + phosphate.

IDA

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:0005516

calmodulin binding

Interacting selectively and non-covalently with calmodulin, a calcium-binding protein with many roles, both in the calcium-bound and calcium-free states.

IEA

MF

GO:0005525

GTP binding

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

IDA

MF

GO:0019003

GDP binding

Interacting selectively and non-covalently with GDP, guanosine 5'-diphosphate.

IDA