Cell Signaling: Receptors

Α subunit

________ and β /γ dimer interact with other proteins in a signaling pathway.

Signals

________ binding to cell surface are "first messenger.

receptor complex

An activated hormone- ________ can act as a transcription factor, turning on specific genes.

GTP

________ causes G protein to dissociate.

G protein

Activated receptor activates ________.

intracellular domains

Many receptors have ________ with enzyme function.

Intracellular receptors

________: found in the cytosol or nucleus of target cells.

Growth factor

________- hormone that acts to stimulate cell growth or division.

Receptor tyrosine kinases

________: category of enzyme- linked receptors found in animals.

Receptor tyrosine kinases

category of enzyme-linked receptors found in animals

Growth factor

hormone that acts to stimulate cell growth or division

example

Epidermal Growth Factor (EGF)

Intracellular receptors

found in the cytosol or nucleus of target cells

Three kinds of cell surface receptors

Enzyme-linked receptors (RTK)

G-protein coupled receptors (GPCR)

Ligand-gated ion channels