Ethylene Receptors in Plant Cells

Question

Ethylene receptors in plant cells ...
A) are located primarily at the plasma membrane.
B) are single-pass transmembrane proteins.
C) interact with CTR1, which is closely related to the monomeric G protein Ras.
D) have a copper-containing ethylene-binding domain.
E) All of the above.

Accepted Answer

Ethylene receptors in plant cells are dimeric multipass transmembrane proteins primarily located in the endoplasmic reticulum. In addiction to a copper-containing ethylene-binding domain, they contain a cytosolic domain that interacts with CTR1, a serine/threonine kinase related to Raf, an upstream kinase in the MAP kinase module in animal cells.