What is the purpose of receptor proteins?

Answer 1

The intracellular proteins form the most important class of receptors called receptor proteins.

Receptor proteins are located in the cytoplasm, cell membrane, or nuclear membrane.

1. Cytoplasmic receptor proteins include those that respond to steroid hormones. Ligand activated receptors may enter the cell nucleus where they modulate gene expression.

2. Receptors within cell membranes may be peripheral or trans-membrane proteins. Many receptors for hormones and neurotransmission are trans-membrane proteins.

- a. Metabotropic receptors are coupled to G-proteins, acting through various secondary pathways involving ion channels, enzymes such as adenylyl (adenylate) cyclases, and phospholipases, or PDZ domains.

- b. Ionotropic receptors are ligand-activated ion channels that permit entry of ions when the central pore is open. A receptor protein is protein molecule that found embedded in the plasma membrane surface of a cell. It receives chemical signals from outside the cell.

Answer 2

Their function is to carry on the signal sent to the cell's nucleus to generate required action. They are designed so special molecules can bind to them, and send messages to the cell that trigger a reaction within the cell.

Answer 3

Receptor proteins are used to pass messages between cells. They send the messages from outside of the cell to the inside of the cell.

Answer 4

is a protein that binds to a specific signal molecule, enabling the cell to to respond to the signal molecule.

they are responsible for picking up signals.

Answer 5

The job of a receptor protein is to receive chemical signals from outside the cell.

Answer 6

They provide sperm for the testes.