BP

GO:0001755

neural crest cell migration

The characteristic movement of cells from the dorsal ridge of the neural tube to a variety of locations in a vertebrate embryo.

IBA

BP

GO:0006915

apoptotic process

A programmed cell death process which begins when a cell receives an internal (e.g. DNA damage) or external signal (e.g. an extracellular death ligand), and proceeds through a series of biochemical events (signaling pathway phase) which trigger an execution phase. The execution phase is the last step of an apoptotic process, and is typically characterized by rounding-up of the cell, retraction of pseudopodes, reduction of cellular volume (pyknosis), chromatin condensation, nuclear fragmentation (karyorrhexis), plasma membrane blebbing and fragmentation of the cell into apoptotic bodies. When the execution phase is completed, the cell has died.

NAS

BP

GO:0007010

cytoskeleton organization

A process that is carried out at the cellular level which results in the assembly, arrangement of constituent parts, or disassembly of cytoskeletal structures.

NAS

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.

NAS

BP

GO:0007399

nervous system development

The process whose specific outcome is the progression of nervous tissue over time, from its formation to its mature state.

NAS

BP

GO:0007411

axon guidance

The chemotaxis process that directs the migration of an axon growth cone to a specific target site in response to a combination of attractive and repulsive cues.

NAS

BP

GO:0009887

animal organ morphogenesis

Morphogenesis of an animal organ. An organ is defined as a tissue or set of tissues that work together to perform a specific function or functions. Morphogenesis is the process in which anatomical structures are generated and organized. Organs are commonly observed as visibly distinct structures, but may also exist as loosely associated clusters of cells that work together to perform a specific function or functions.

NAS

BP

GO:0048843

negative regulation of axon extension involved in axon guidance

Any process that stops, prevents, or reduces the frequency, rate or extent of axon extension involved in axon guidance.

IBA

BP

GO:0050919

negative chemotaxis

The directed movement of a motile cell or organism towards a lower concentration of a chemical.

IEA

BP

GO:0071526

semaphorin-plexin signaling pathway

A series of molecular signals generated as a consequence of a semaphorin receptor (composed of a plexin and a neurophilin) binding to a semaphorin ligand.

IBA

BP

GO:2001224

positive regulation of neuron migration

Any process that activates or increases the frequency, rate or extent of neuron migration.

IBA

CC

GO:0005887

integral component of plasma membrane

The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.

IBA

CC

GO:0016021

integral component of membrane

The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.

NAS

CC

GO:0030424

axon

The long process of a neuron that conducts nerve impulses, usually away from the cell body to the terminals and varicosities, which are sites of storage and release of neurotransmitter.

NAS

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:0030215

semaphorin receptor binding

Interacting selectively and non-covalently with semaphorin receptors.

IBA

MF

GO:0045499

chemorepellent activity

Providing the environmental signal that initiates the directed movement of a motile cell or organism towards a lower concentration of that signal.

IBA