mTOR Signaling Pathway | Nutrient and Cell Stress Regulation

The video tutorial provides an in-depth analysis of the mTOR signaling pathway, highlighting its role in regulating growth, proliferation, and survival. It explains the two complexes of mTOR, the influence of growth factors and insulin on mTOR activation, and the mechanisms leading to its inhibition. The tutorial also covers the internal and external regulation of mTOR complexes, including feedback loops and the role of various proteins and amino acids in modulating mTOR activity.

What is the primary role of the mTOR signaling pathway?

• Regulating immune response

• Regulating neural activity

• Regulating cell death

• Regulating growth, proliferation, and survival

Which complex is activated by growth factors through the Ras-RAF-MEK-ERK pathway?

• mTORC1

• mTORC2

• AMPK

• GATOR1

How does insulin influence mTOR signaling?

• By degrading mTORC1

• By increasing cellular stress

• By inhibiting TSC2 through AKT

• By activating AMPK

What role does AMPK play in mTOR signaling?

• It degrades mTORC2

• It inhibits TSC2

• It activates TSC2

• It activates mTORC1

Which cellular stress mechanism involves DNA damage?

• Activation of AMPK

• Activation of P53 and REDD1

• Inhibition of mTORC2

• Activation of PI3K

How does arginine affect mTOR signaling?

• It inhibits GATOR2

• It activates GATOR1

• It inhibits CASTOR1

• It degrades mTORC1

What is the role of leucine in mTOR signaling?

• It activates AMPK

• It degrades mTORC2

• It inhibits Sestrin2

• It activates Sestrin2

Which protein is involved in the kinase activity of mTORC1?

• MLST8

• PRAS40

• DEPTOR

• Rictor

What is the function of DEPTOR in mTOR complexes?

• It activates mTORC1

• It inhibits mTORC1 and mTORC2

• It degrades Rictor

• It phosphorylates AKT

How do caspases regulate mTOR complexes?

• By degrading Rictor and Raptor

• By activating mTORC1

• By phosphorylating PRAS40

• By inhibiting AKT