|
MAPKKK
Mitogen Activated Protein (MAP) kinase kinase kinase, MAPKKK (or MAP3K) is a serine/threonine-specific protein kinase which acts upon MAP kinase kinase. Subsequently, MAP kinase kinase activates MAP kinase. Several types of MAPKKK can exist but are mainly characterized by the MAP kinases they activate. MAPKKKs are stimulated by a large range of stimuli, primarily environmental and intracellular stressors. MAPKKK is responsible for various cell functions such as cell proliferation, cell differentiation, and apoptosis. The duration and intensity of signals determine which pathway ensues. Additionally, the use of protein scaffolds helps to place the MAPKKK in close proximity with its substrate to allow for a reaction. Lastly, because MAPKKK is involved in a series of several pathways, it has been used as a therapeutic target for cancer, amyloidosis, and neurodegenerative diseases. In humans, there are at least 19 genes which encode MAP kinase kinase kinases: * MAP3K1 (aka MEKK1) * M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAP3K4
Mitogen-activated protein kinase kinase kinase 4 is an enzyme that in humans is encoded by the ''MAP3K4'' gene. The central core of each mitogen-activated protein kinase (MAPK) pathway is a conserved cascade of 3 protein kinases: an activated MAPK kinase kinase (MAPKKK) phosphorylates and activates a specific MAPK kinase (MAPKK), which then activates a specific MAPK. While the ERK MAPKs are activated by mitogenic stimulation, the CSBP2 (p38α) and JNK MAPKs are activated by environmental stresses such as osmotic shock, UV irradiation, wound stress, and inflammatory factors. This gene encodes a MAPKKK, the MEKK4 protein, also called MTK1. This protein contains a protein kinase catalytic domain at the C terminus. The N-terminal nonkinase domain may contain a regulatory domain. Expression of MEKK4 in mammalian cells activated the CSBP2 (p38α) and JNK MAPK pathways, but not the ERK pathway. In vitro kinase studies indicated that recombinant MEKK4 can specifically phosphorylate and acti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ASK1
Apoptosis signal-regulating kinase 1 (ASK1) also known as mitogen-activated protein kinase 5 (MAP3K5) is a member of MAP kinase family and as such a part of mitogen-activated protein kinase pathway. It activates c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinases in a Raf-independent fashion in response to an array of stresses such as oxidative stress, endoplasmic reticulum stress and calcium influx. ASK1 has been found to be involved in cancer, diabetes, rheumatoid arthritis, cardiovascular and neurodegenerative diseases. ''MAP3K5'' gene coding for the protein is located on chromosome 6 at locus 6q22.33. and the transcribed protein contains 1,374 amino acids with 11 kinase subdomains. Northern blot analysis shows that MAP3K5 transcript is abundant in human heart and pancreas. Mechanism of activation Under nonstress conditions ASK1 is oligomerized (a requirement for its activation) through its C-terminal coiled-coil domain (CCC), but remains in an inactive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAP3K5
Apoptosis signal-regulating kinase 1 (ASK1) also known as mitogen-activated protein kinase 5 (MAP3K5) is a member of MAP kinase family and as such a part of mitogen-activated protein kinase pathway. It activates c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinases in a Raf-independent fashion in response to an array of stresses such as oxidative stress, endoplasmic reticulum stress and calcium influx. ASK1 has been found to be involved in cancer, diabetes, rheumatoid arthritis, cardiovascular and neurodegenerative diseases. ''MAP3K5'' gene coding for the protein is located on chromosome 6 at locus 6q22.33. and the transcribed protein contains 1,374 amino acids with 11 kinase subdomains. Northern blot analysis shows that MAP3K5 transcript is abundant in human heart and pancreas. Mechanism of activation Under nonstress conditions ASK1 is oligomerized (a requirement for its activation) through its C-terminal coiled-coil domain (CCC), but remains in an inactive ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAP3K7
Mitogen-activated protein kinase kinase kinase 7 (MAP3K7), also known as TAK1, is an enzyme that in humans is encoded by the ''MAP3K7'' gene. Structure TAK1 is an evolutionarily conserved kinase in the MAP3 K family and clusters with the tyrosine-like and sterile kinase families. The protein structure of TAK1 contains an N (residues 1–104)- and C (residues 111–303)-terminus connected through the hinge region (Met 104-Ser 111). The ATP binding pocket is located in the hinge region of the kinase. Additionally, TAK1 has a catalytic lysine (Lys63) in the active site. Crystal structure of TAK1-ATP have shown that ATP forms two hydrogen bonds with residues Ala 107 and Glu 105. Further hydrogen bonding is observed to Asp 175, which is the leading residue of the DFG motif. This residue is thought to interact with Lys 63 through polar interactions and is catalytically important for phosphate transfer to substrate molecules. Critical for the TAK1-TAB1 complex is a helical loop arou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAF1
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 that in humans is encoded by the ''RAF1'' gene. 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. C-Raf is a member of the Raf kinase family of serine/threonine-specific protein kinases, from the TKL (Tyrosine-kinase-like) group of kinases. Discovery The first Raf gene, v-Raf was found in 1983. It was isolated from the murine retrovirus bearing the number 3611. It was soon demonstrated to be capable to transform rodent fibroblasts to cancerous cell lines, so this gene was given the name Virus-induced Rapidly Accelerated Fibrosarcoma (V-RAF). A year later, another transforming gene was found in the avian retrovirus MH2, named v-Mil - that turned out to be highly similar to v-Raf. Researchers were able to demonstrate that these genes encode enzymes t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAP3K14
Mitogen-activated protein kinase kinase kinase 14 also known as NF-kappa-B-inducing kinase (NIK) is an enzyme that in humans is encoded by the ''MAP3K14'' gene. Function This gene encodes mitogen-activated protein kinase kinase kinase 14, NIK, which is a serine/threonine protein-kinase. This kinase binds to TRAF2 and stimulates NF-κB activity. It is a critical kinase of the alternative NF-κB activation pathway. It shares sequence similarity with several other MAPKK kinases. It participates in an NF-κB-inducing signalling cascade common to receptors of the tumour-necrosis/nerve-growth factor ( TNF/ NGF) family and to the interleukin-1 type-I receptor. Interactions MAP3K14 has been shown to interact with: * CHUK, * IKK2, and * TRAF2 TNF receptor-associated factor 2 is a protein that in humans is encoded by the ''TRAF2'' gene. Function The protein encoded by this gene is a member of the TNF receptor associated factor (TRAF) protein family. TRAF proteins associate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MAP3K15
Mitogen-activated protein kinase kinase kinase 15 is a protein that in humans is encoded by the MAP3K15 gene. Function The protein encoded by this gene is a member of the mitogen-activated protein kinase (MAPK) family. These family members function in a protein kinase signal transduction cascade, where an activated MAPK kinase kinase (MAP3K) phosphorylates and activates a specific MAPK kinase (MAP2K), which then activates a specific MAPK. This MAP3K protein plays an essential role in apoptotic cell death Apoptosis (from grc, ἀπόπτωσις, apóptōsis, 'falling off') is a form of programmed cell death that occurs in multicellular organisms. Biochemical events lead to characteristic cell changes ( morphology) and death. These changes inclu ... triggered by cellular stresses. References Further reading {{gene-X-stub Human proteins Genetics Genes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serine/threonine-specific Protein Kinase
A serine/threonine protein kinase () is a kinase enzyme, in particular a protein kinase, that phosphorylates the OH group of the amino-acid residues serine or threonine, which have similar side chains. At least 350 of the 500+ human protein kinases are serine/threonine kinases (STK). In enzymology, the term ''serine/threonine protein kinase'' describes a class of enzymes in the family of transferases, that transfer phosphates to the oxygen atom of a serine or threonine side chain in proteins. This process is called phosphorylation. Protein phosphorylation in particular plays a significant role in a wide range of cellular processes and is a very important posttranslational modification. The chemical reaction performed by these enzymes can be written as :ATP + a protein \rightleftharpoons ADP + a phosphoprotein Thus, the two substrates of this enzyme are ATP and a protein, whereas its two products are ADP and phosphoprotein. The systematic name of this enzyme class ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TAOK1
Serine/threonine-protein kinase TAO1 is an enzyme that in humans is encoded by the ''TAOK1'' gene In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a b .... References Further reading * * * * * * * * * * * * * * {{gene-17-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
