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TLS Online TPP Program

#Id: 9854

Phototropins (phots) are involved in directing organ, chloroplast, and nuclear movements, solar tracking, and stomatal opening

#Unit 6. System Physiology – Plant #Blue-Light Responses and Photoreceptors #Part B Pointers
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TLS Online TPP Program

#Id: 9299

#Unit 4. Cell Communication and Cell Signaling

Rod cells sense light with the aid of a light-sensitive GPCR called rhodopsin.
TLS Online TPP Program

#Id: 9300

#Unit 4. Cell Communication and Cell Signaling

Rhodopsin has two components: 
Opsin protein, member of the GPCR A family 
11-cis-retinal light-absorbing pigment
TLS Online TPP Program

#Id: 9301

#Unit 4. Cell Communication and Cell Signaling
TLS Online TPP Program

#Id: 9302

#Unit 4. Cell Communication and Cell Signaling

11-cis-retinal covalently attached to the amino group of lysine residue 296 in the opsin protein
TLS Online TPP Program

#Id: 9303

#Unit 4. Cell Communication and Cell Signaling

The heterotrimeric G protein coupled to rhodopsin, called transducin (Gt)
TLS Online TPP Program

#Id: 9304

#Unit 4. Cell Communication and Cell Signaling

In the absence of light,  bound 11-cis-retinal locks the rhodopsin into its inactive (R) conformation