What is nuclear respiratory factor 1?

Nuclear respiratory factor 1 (NRF-1) is a transcription factor that functions primarily as a positive regulator of nuclear genes involved in mitochondrial biogenesis and oxidative phosphorylation, such as Tfam, which moves into the mitochondria and regulates mitochondrial DNA transcription (Scarpulla, 2006, 2008).

What are nuclear factor?

Nuclear Factor-κB (NF-κB) is a protein complex that controls the transcription of DNA. It is an inducible transcription factor and an important regulator of many genes involved in inflammatory (including adhesion molecules) and immune responses, proliferation, and apoptosis.

What is the function of Nrf1?

Nrf1 functions as a transcription factor that activates the expression of some key metabolic genes regulating cellular growth and nuclear genes required for mitochondrial respiration, and mitochondrial DNA transcription and replication.

What is Nrf1 and Nrf2?

Nrf1 is a member of the vertebrate Cap’n’Collar (CNC) transcription factor family that commonly contains a unique basic-leucine zipper domain. Among CNC family members, Nrf2 is known to regulate a battery of antioxidant and xenobiotic-metabolizing enzyme genes through the antioxidant response element (ARE).

What is the NRF1 pathway?

The NRF1 Signaling Pathway The NRF1 pathway stimulates an Nrf1 protein (Nuclear respiratory factor-1) which in turn activates key genes involved in metabolism, cellular growth, energy production, and mitochondrial DNA transcription and replication.

How is AP 1 activated?

AP-1 activity is induced by numerous extracellular matrix and genotoxic agents, suggesting involvement in programmed cell death. Many of these stimuli activate the c-Jun N-terminal kinases (JNKs) leading to the phosphorylation of Jun proteins and enhanced transcriptional activity of AP-1 dependent genes.

What is nuclear factor kappa beta?

Listen to pronunciation. (NOO-klee-er FAK-ter-KA-puh …) A group of proteins that help control many functions in a cell, including cell growth and survival. These proteins also control the body’s immune and inflammatory responses.

What activates NRF1?

Genetic or physiological activation of mTORC1 lead to increased NRF1 protein levels in cells and tissues, including the liver and brain. Another surprise came from our finding that this increase in NRF1 levels results from the mTORC1-mediated activation of SREBP1, which directly induces NRF1 gene expression12 (Fig. 1).

What does Nrf2 stand for?

Nuclear factor-erythroid factor 2-related factor 2 (Nrf2) is a critical transcription factor that regulates the expression of over 1000 genes in the cell under normal and stressed conditions.

Is NRF2 anti inflammatory?

Nrf2 reduces inflammatory damage by regulating these inflammatory factors. In these models of acute inflammation, the increased regulation of antioxidant enzymes, pro-inflammatory cytokines, and mediators by the Nrf2 signaling pathway reduces the inflammatory injury in WT animals.

How do I activate NRF2?

NRF2 (nuclear factor erythroid-2-related factor 2) is a transcription factor that activates over 500 genes via molecules called sirtuins. NRF2 activation can be achieved through exercise, calorie restriction (including fasting) and ingestion of natural nutrients that are NRF2 activators.

How does PGC-1α activate nuclear respiratory factors?

PGC-1α activates transcriptional factors such as nuclear respiratory factors 1 and 2 (NRF1 and NRF2) and TFAM, which in turn induce Mt respiratory chain proteins and lead to replication of the Mt genome ( Kelly & Scarpulla, 2004; Puigserver & Spiegelman, 2003; Wu et al., 1999 ).

What does NRF 1 regulate in mitochondria?

34 Meanwhile, NRF 1 regulates the expression of many mitochondrial genes including OXPHOS genes and mitochondrial transcription factor A, which are crucial for mitochondrial gene expression and replication (Fig. 9.3). Sijie Tan, Esther Wong, in Mitochondrial Physiology and Vegetal Molecules, 2021

What is the relationship between NRF1 and estrogen-related factor-α/β/γ?

Similarly, peroxisome proliferator-activated receptor γ coactivator 1-alpha (PGC-1 α) and PGC-1β are the known partners of NRF1 and estrogen-related factor-α/β/γ (ERR-α/β/γ), which regulates the biogenesis through its complex transcriptional network and increasing the expression of specific mitochondrial proteins ( Ploumi et al., 2017 ).

How do nuclear respiratory factors control mitochondrial biogenesis?

In mammalian cells, nuclear respiratory factors (NRF) 1 and 2 control mitochondrial biogenesis by modulating the transcription of nuclear genes encoding mitochondrial ETC protein subunits ( Ongwijitwat et al., 2006; Dhar et al., 2008 ).