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RAF is an acronym for Rapidly Accelerated Fibrosarcoma. [12] RAF kinases participate in the RAS-RAF-MEK-ERK signal transduction cascade, also referred to as the mitogen-activated protein kinase (MAPK) cascade. [11] Activation of RAF kinases requires interaction with RAS-GTPases. The three RAF kinase family members are: A-RAF; B-RAF; c-Raf
The RAF kinase phosphorylates and activates a MAPK/ERK Kinase (MEK1 or MEK2). The MEK phosphorylates and activates a mitogen-activated protein kinase (MAPK). RAF and MAPK/ERK are both serine/threonine-specific protein kinases. MEK is a serine/tyrosine/threonine kinase. In a technical sense, RAF, MEK, and MAPK are all mitogen-activated kinases ...
RAF proto-oncogene serine/threonine-protein kinase, also known as proto-oncogene c-RAF or simply c-Raf or even Raf-1, is an enzyme [4] that in humans is encoded by the RAF1 gene. [ 5 ] [ 6 ] The c-Raf protein is part of the ERK1/2 pathway as a MAP kinase (MAP3K) that functions downstream of the Ras subfamily of membrane associated GTPases. [ 7 ]
The MAP kinase-kinase, which activates ERK, was named "MAPK/ERK kinase" . [5] Receptor-linked tyrosine kinases, Ras, Raf, MEK, and MAPK could be fitted into a signaling cascade linking an extracellular signal to MAPK activation. [6] See: MAPK/ERK pathway. Transgenic gene knockout mice lacking MAPK1 have major defects in early development. [7]
Progestin and adipoQ receptor family member 3 (PAQR3), or Raf Kinase Trapping to Golgi apparatus (RKTG) is a protein that in humans is encoded by the PAQR3 gene. [5] It is a member of the progestin and adipoQ receptor (PAQR) family. [6] PAQR3 is predicted to have seven transmembrane helices and to be localized to the Golgi Apparatus.
For example, KSR1 and KSR2 are actually MAP3 kinases and related to the Raf proteins. [37] Although KSRs alone display negligible MAP3 kinase activity, KSR proteins can still participate in the activation of Raf kinases by forming side-to-side heterodimers with them, providing an allosteric pair to turn on each enzymes. [38]
“In simple terms, all the genes identified in our study are common ‘health and fitness related genes’, and previous research has identified the role of each gene separately and what it does.
Serine/threonine-protein kinase A-Raf or simply A-Raf is an enzyme that in humans is encoded by the ARAF gene. [5] A-Raf is a member of the Raf kinase family of serine/threonine-specific protein kinases. [6] Compared to the other members of this family (Raf-1 and B-Raf), very little is known about A-Raf.