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TLS Online TPP Program

#Id: 10013


In the absence of Hh,
Ptc inhibits Smoothened and then degraded in proteasomes

#XL - T Zoology #Hedgehog Signaling #Part B Pointers
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TLS Online TPP Program

#Id: 9067

#XL - T Zoology

Phosphorylated CREB binds to CRE-containing target genes and also binds to the co-activator termed CBP/P300, thereby stimulating gene transcription

TLS Online TPP Program

#Id: 9068

#XL - T Zoology


TLS Online TPP Program

#Id: 9069

#XL - T Zoology

Inactive PKA is a tetramer consisting of- 
two regulatory (R) subunits
two catalytic (C) subunits

TLS Online TPP Program

#Id: 9070

#XL - T Zoology

Two large classes of GTPase switch proteins are used in signal transduction pathways:

1. Heterotrimeric G proteins

2. Monomeric G proteins

TLS Online TPP Program

#Id: 9071

#XL - T Zoology

Feedback mechanisms suppress signaling by the PKA pathway:
1. Intrinsic GTPase activity of Gαs
2. PDE acts to hydrolyze cAMP to 5′-AMP
3. By BARK

TLS Online TPP Program

#Id: 9072

#XL - T Zoology

In resting state 
basal level of PDE activity keeps cAMP levels below those necessary for PKA activation.

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