Ampk Mtor Pathway
Ampk Mtor Pathway - Related Videos
01:22
PI3K/mTOR/AKT Signaling Pathway
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2023
The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that regulates growth, proliferation, and cell survival in response to hormones, growth factors, or nutrient availability. This kinase exists in two structurally and functionally distinct forms: mTOR complex 1 (mTORC1) and mTOR complex 2 (mTORC2). The first form (mTORC1) is composed of a rapamycin-sensitive Raptor and proline-rich Akt substrate, PRAS40. In contrast, mTORC2 consists of a rapamycin-insensitive companion...
03:03
mTOR Signaling and Cancer Progression
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2023
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors. The mTOR pathway or the...
03:03
mTOR Signaling and Cancer Progression
0 Views •
2021
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors. The mTOR pathway or the...
01:27
C4 Pathway and CAM
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2019
Most plants use the C3 pathway for carbon fixation. However, some plants, such as sugar cane, corn, and cacti that grow in hot conditions, use alternative pathways to fix carbon and conserve energy loss due to photorespiration. Photorespiration is the process that occurs when the oxygen concentration is high. Under such conditions, the rubisco enzyme in the Calvin cycle binds O2 instead of CO2, which halts photosynthesis and consumes energy. C4 Pathway The C4 pathway is used by plants such as...
01:24
Other Glycolytic Pathways
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2025
The pentose phosphate pathway (PPP) operates in parallel with glycolysis, facilitating the metabolism of both pentoses and glucose. This pathway consists of two distinct phases: the oxidative and non-oxidative phases. While it does not directly generate ATP, the intermediates formed during the process can integrate into glycolysis, contributing to cellular energy metabolism when required.Oxidative Phase: NADPH ProductionThe oxidative phase of the pentose phosphate pathway is primarily...
FAQs
When ATP falls and AMP rises, AMPK becomes activated. It restrains mTORC1 through mechanisms involving TSC2 and raptor, reducing growth-oriented signaling that would consume scarce resources. This shift favors conservation and supports energy-producing processes, linking the cell’s energy state to decisions about biosynthesis and growth.
mTORC1 responds to nutrients and growth signals by activating S6K and 4E-BP1, downstream effectors associated with increased protein synthesis. At the same time, it suppresses autophagy. These coordinated effects support biosynthetic activity when cellular conditions favor growth rather than resource conservation.
These signals favor different priorities: AMPK activation restrains mTORC1 when energy is limited, whereas nutrient and growth signaling activates mTORC1. The resulting balance helps determine whether cellular resources support energy-producing processes or growth-related biosynthesis. In medicine, this relationship connects metabolic state with disease-associated changes in cellular behavior.
mTORC1 activity suppresses autophagy, connecting nutrient and growth signals to this cellular response. Because AMPK can restrain mTORC1 during low-energy conditions, the pathway links energy sensing with whether biosynthetic growth signals remain active or are reduced. This connection is relevant when interpreting altered cellular metabolism in disease biology.
Changes in S6K and 4E-BP1 signaling reveal how mTORC1 is influencing protein synthesis, while autophagy provides a complementary outcome. Considering these outputs together reflects the network’s coordinated effects on biosynthesis, growth signaling, and resource conservation. These downstream responses therefore support mechanistic studies of the pathway in medicine.
Research on this pathway is relevant to cancer, diabetes, metabolic disorders, and neurodegeneration. These areas involve questions about cellular growth, energy use, nutrient handling, or biosynthetic activity. Studying AMPK-mTOR signaling helps investigators relate those disease contexts to changes in the balance between energy availability and growth-promoting processes.
Therapeutic strategies can be designed around adjusting cellular growth or energy metabolism, depending on the disease context. The rationale comes from the pathway’s opposing control of resource conservation, biosynthesis, and autophagy. This approach supports investigation across cancer, diabetes, metabolic disorders, and neurodegeneration, where growth-energy balance may be clinically relevant.