Tyrosine-protein kinase JAK2


NameTyrosine-protein kinase JAK2
Synonyms
  • 2.7.10.2
  • JAK-2
  • Janus kinase 2
Gene NameJAK2
OrganismHuman
Amino acid sequence
>lcl|BSEQ0021326|Tyrosine-protein kinase JAK2
MGMACLTMTEMEGTSTSSIYQNGDISGNANSMKQIDPVLQVYLYHSLGKSEADYLTFPSG
EYVAEEICIAASKACGITPVYHNMFALMSETERIWYPPNHVFHIDESTRHNVLYRIRFYF
PRWYCSGSNRAYRHGISRGAEAPLLDDFVMSYLFAQWRHDFVHGWIKVPVTHETQEECLG
MAVLDMMRIAKENDQTPLAIYNSISYKTFLPKCIRAKIQDYHILTRKRIRYRFRRFIQQF
SQCKATARNLKLKYLINLETLQSAFYTEKFEVKEPGSGPSGEEIFATIIITGNGGIQWSR
GKHKESETLTEQDLQLYCDFPNIIDVSIKQANQEGSNESRVVTIHKQDGKNLEIELSSLR
EALSFVSLIDGYYRLTADAHHYLCKEVAPPAVLENIQSNCHGPISMDFAISKLKKAGNQT
GLYVLRCSPKDFNKYFLTFAVERENVIEYKHCLITKNENEEYNLSGTKKNFSSLKDLLNC
YQMETVRSDNIIFQFTKCCPPKPKDKSNLLVFRTNGVSDVPTSPTLQRPTHMNQMVFHKI
RNEDLIFNESLGQGTFTKIFKGVRREVGDYGQLHETEVLLKVLDKAHRNYSESFFEAASM
MSKLSHKHLVLNYGVCVCGDENILVQEFVKFGSLDTYLKKNKNCINILWKLEVAKQLAWA
MHFLEENTLIHGNVCAKNILLIREEDRKTGNPPFIKLSDPGISITVLPKDILQERIPWVP
PECIENPKNLNLATDKWSFGTTLWEICSGGDKPLSALDSQRKLQFYEDRHQLPAPKWAEL
ANLINNCMDYEPDFRPSFRAIIRDLNSLFTPDYELLTENDMLPNMRIGALGFSGAFEDRD
PTQFEERHLKFLQQLGKGNFGSVEMCRYDPLQDNTGEVVAVKKLQHSTEEHLRDFEREIE
ILKSLQHDNIVKYKGVCYSAGRRNLKLIMEYLPYGSLRDYLQKHKERIDHIKLLQYTSQI
CKGMEYLGTKRYIHRDLATRNILVENENRVKIGDFGLTKVLPQDKEYYKVKEPGESPIFW
YAPESLTESKFSVASDVWSFGVVLYELFTYIEKSKSPPAEFMRMIGNDKQGQMIVFHLIE
LLKNNGRLPRPDGCPDEIYMIMTECWNNNVNQRPSFRDLALRVDQIRDNMAG
Number of residues1132
Molecular Weight130672.475
Theoretical pI7.21
GO Classification
Functions
  • growth hormone receptor binding
  • receptor binding
  • heme binding
  • SH2 domain binding
  • non-membrane spanning protein tyrosine kinase activity
  • histone kinase activity (H3-Y41 specific)
  • protein kinase binding
  • ATP binding
  • protein kinase activity
  • interleukin-12 receptor binding
  • histone binding
  • protein tyrosine kinase activity
Processes
  • hormone-mediated signaling pathway
  • protein phosphorylation
  • positive regulation of tyrosine phosphorylation of Stat3 protein
  • axon guidance
  • interleukin-12-mediated signaling pathway
  • response to lipopolysaccharide
  • tyrosine phosphorylation of STAT protein
  • tyrosine phosphorylation of Stat1 protein
  • Fc-epsilon receptor signaling pathway
  • cellular response to dexamethasone stimulus
  • response to antibiotic
  • positive regulation of protein import into nucleus, translocation
  • Ras protein signal transduction
  • positive regulation of insulin secretion
  • cell differentiation
  • negative regulation of cardiac muscle cell apoptotic process
  • extrinsic apoptotic signaling pathway
  • positive regulation of cell migration
  • negative regulation of neuron apoptotic process
  • tyrosine phosphorylation of Stat3 protein
  • vascular endothelial growth factor receptor signaling pathway
  • axon regeneration
  • cell migration
  • mineralocorticoid receptor signaling pathway
  • cellular response to lipopolysaccharide
  • activation of MAPKK activity
  • positive regulation of cell-substrate adhesion
  • small GTPase mediated signal transduction
  • tyrosine phosphorylation of Stat5 protein
  • G-protein coupled receptor signaling pathway
  • adaptive immune response
  • epidermal growth factor receptor signaling pathway
  • negative regulation of cell-cell adhesion
  • cytokine-mediated signaling pathway
  • positive regulation of sequence-specific DNA binding transcription factor activity
  • apoptotic process
  • activation of cysteine-type endopeptidase activity involved in apoptotic process
  • negative regulation of DNA binding
  • positive regulation of cell proliferation
  • tumor necrosis factor-mediated signaling pathway
  • innate immune response
  • positive regulation of tyrosine phosphorylation of Stat5 protein
  • signal transduction
  • positive regulation of nitric-oxide synthase biosynthetic process
  • fibroblast growth factor receptor signaling pathway
  • actin filament polymerization
  • negative regulation of heart contraction
  • positive regulation of phosphatidylinositol 3-kinase signaling
  • interferon-gamma-mediated signaling pathway
  • peptidyl-tyrosine autophosphorylation
  • histone H3-Y41 phosphorylation
  • response to tumor necrosis factor
  • insulin receptor signaling pathway
  • activation of JAK2 kinase activity
  • regulation of apoptotic process
  • erythrocyte differentiation
  • positive regulation of tumor necrosis factor production
  • regulation of interferon-gamma-mediated signaling pathway
  • peptidyl-tyrosine phosphorylation
  • movement of cell or subcellular component
  • positive regulation of cell differentiation
  • MAPK cascade
  • JAK-STAT cascade involved in growth hormone signaling pathway
  • mesoderm development
  • intracellular signal transduction
  • response to hydroperoxide
  • host programmed cell death induced by symbiont
  • platelet-derived growth factor receptor signaling pathway
  • enzyme linked receptor protein signaling pathway
  • chromatin organization
  • negative regulation of cell proliferation
  • JAK-STAT cascade
  • positive regulation of interleukin-1 beta production
  • positive regulation of inflammatory response
  • mammary gland epithelium development
  • positive regulation of cytosolic calcium ion concentration
  • positive regulation of nitric oxide biosynthetic process
  • positive regulation of phosphoprotein phosphatase activity
  • intrinsic apoptotic signaling pathway in response to oxidative stress
  • neurotrophin TRK receptor signaling pathway
  • positive regulation of DNA binding
  • regulation of inflammatory response
  • positive regulation of cell activation
  • positive regulation of peptidyl-tyrosine phosphorylation
  • protein autophosphorylation
  • blood coagulation
  • activation of cysteine-type endopeptidase activity involved in apoptotic signaling pathway
  • positive regulation of transcription from RNA polymerase II promoter
  • growth hormone receptor signaling pathway
  • response to interleukin-12
  • positive regulation of growth hormone receptor signaling pathway
  • regulation of cell proliferation
  • STAT protein import into nucleus
Components
  • nucleus
  • caveola
  • cytoplasm
  • endosome lumen
  • cytosol
  • nuclear matrix
  • extrinsic component of cytoplasmic side of plasma membrane
  • cytoskeleton
  • nucleoplasm
  • membrane raft
General FunctionSh2 domain binding
Specific FunctionNon-receptor tyrosine kinase involved in various processes such as cell growth, development, differentiation or histone modifications. Mediates essential signaling events in both innate and adaptive immunity. In the cytoplasm, plays a pivotal role in signal transduction via its association with type I receptors such as growth hormone (GHR), prolactin (PRLR), leptin (LEPR), erythropoietin (EPOR), thrombopoietin (THPO); or type II receptors including IFN-alpha, IFN-beta, IFN-gamma and multiple interleukins. Following ligand-binding to cell surface receptors, phosphorylates specific tyrosine residues on the cytoplasmic tails of the receptor, creating docking sites for STATs proteins. Subsequently, phosphorylates the STATs proteins once they are recruited to the receptor. Phosphorylated STATs then form homodimer or heterodimers and translocate to the nucleus to activate gene transcription. For example, cell stimulation with erythropoietin (EPO) during erythropoiesis leads to JAK2 autophosphorylation, activation, and its association with erythropoietin receptor (EPOR) that becomes phosphorylated in its cytoplasmic domain. Then, STAT5 (STAT5A or STAT5B) is recruited, phosphorylated and activated by JAK2. Once activated, dimerized STAT5 translocates into the nucleus and promotes the transcription of several essential genes involved in the modulation of erythropoiesis. In addition, JAK2 mediates angiotensin-2-induced ARHGEF1 phosphorylation. Plays a role in cell cycle by phosphorylating CDKN1B. Cooperates with TEC through reciprocal phosphorylation to mediate cytokine-driven activation of FOS transcription. In the nucleus, plays a key role in chromatin by specifically mediating phosphorylation of 'Tyr-41' of histone H3 (H3Y41ph), a specific tag that promotes exclusion of CBX5 (HP1 alpha) from chromatin.
Transmembrane Regions
GenBank Protein ID
UniProtKB IDO60674
UniProtKB Entry NameJAK2_HUMAN
Cellular LocationEndomembrane system
Gene sequence
>lcl|BSEQ0021327|Tyrosine-protein kinase JAK2 (JAK2)
ATGGGAATGGCCTGCCTTACGATGACAGAAATGGAGGGAACATCCACCTCTTCTATATAT
CAGAATGGTGATATTTCTGGAAATGCCAATTCTATGAAGCAAATAGATCCAGTTCTTCAG
GTGTATCTTTACCATTCCCTTGGGAAATCTGAGGCAGATTATCTGACCTTTCCATCTGGG
GAGTATGTTGCAGAAGAAATCTGTATTGCTGCTTCTAAAGCTTGTGGTATCACACCTGTG
TATCATAATATGTTTGCTTTAATGAGTGAAACAGAAAGGATCTGGTATCCACCCAACCAT
GTCTTCCATATAGATGAGTCAACCAGGCATAATGTACTCTACAGAATAAGATTTTACTTT
CCTCGTTGGTATTGCAGTGGCAGCAACAGAGCCTATCGGCATGGAATATCTCGAGGTGCT
GAAGCTCCTCTTCTTGATGACTTTGTCATGTCTTACCTCTTTGCTCAGTGGCGGCATGAT
TTTGTGCACGGATGGATAAAAGTACCTGTGACTCATGAAACACAGGAAGAATGTCTTGGG
ATGGCAGTGTTAGATATGATGAGAATAGCCAAAGAAAACGATCAAACCCCACTGGCCATC
TATAACTCTATCAGCTACAAGACATTCTTACCAAAATGTATTCGAGCAAAGATCCAAGAC
TATCATATTTTGACAAGGAAGCGAATAAGGTACAGATTTCGCAGATTTATTCAGCAATTC
AGCCAATGCAAAGCCACTGCCAGAAACTTGAAACTTAAGTATCTTATAAATCTGGAAACT
CTGCAGTCTGCCTTCTACACAGAGAAATTTGAAGTAAAAGAACCTGGAAGTGGTCCTTCA
GGTGAGGAGATTTTTGCAACCATTATAATAACTGGAAACGGTGGAATTCAGTGGTCAAGA
GGGAAACATAAAGAAAGTGAGACACTGACAGAACAGGATTTACAGTTATATTGCGATTTT
CCTAATATTATTGATGTCAGTATTAAGCAAGCAAACCAAGAGGGTTCAAATGAAAGCCGA
GTTGTAACTATCCATAAGCAAGATGGTAAAAATCTGGAAATTGAACTTAGCTCATTAAGG
GAAGCTTTGTCTTTCGTGTCATTAATTGATGGATATTATAGATTAACTGCAGATGCACAT
CATTACCTCTGTAAAGAAGTAGCACCTCCAGCCGTGCTTGAAAATATACAAAGCAACTGT
CATGGCCCAATTTCGATGGATTTTGCCATTAGTAAACTGAAGAAAGCAGGTAATCAGACT
GGACTGTATGTACTTCGATGCAGTCCTAAGGACTTTAATAAATATTTTTTGACTTTTGCT
GTCGAGCGAGAAAATGTCATTGAATATAAACACTGTTTGATTACAAAAAATGAGAATGAA
GAGTACAACCTCAGTGGGACAAAGAAGAACTTCAGCAGTCTTAAAGATCTTTTGAATTGT
TACCAGATGGAAACTGTTCGCTCAGACAATATAATTTTCCAGTTTACTAAATGCTGTCCC
CCAAAGCCAAAAGATAAATCAAACCTTCTAGTCTTCAGAACGAATGGTGTTTCTGATGTA
CCAACCTCACCAACATTACAGAGGCCTACTCATATGAACCAAATGGTGTTTCACAAAATC
AGAAATGAAGATTTGATATTTAATGAAAGCCTTGGCCAAGGCACTTTTACAAAGATTTTT
AAAGGCGTACGAAGAGAAGTAGGAGACTACGGTCAACTGCATGAAACAGAAGTTCTTTTA
AAAGTTCTGGATAAAGCACACAGAAACTATTCAGAGTCTTTCTTTGAAGCAGCAAGTATG
ATGAGCAAGCTTTCTCACAAGCATTTGGTTTTAAATTATGGAGTATGTGTCTGTGGAGAC
GAGAATATTCTGGTTCAGGAGTTTGTAAAATTTGGATCACTAGATACATATCTGAAAAAG
AATAAAAATTGTATAAATATATTATGGAAACTTGAAGTTGCTAAACAGTTGGCATGGGCC
ATGCATTTTCTAGAAGAAAACACCCTTATTCATGGGAATGTATGTGCCAAAAATATTCTG
CTTATCAGAGAAGAAGACAGGAAGACAGGAAATCCTCCTTTCATCAAACTTAGTGATCCT
GGCATTAGTATTACAGTTTTGCCAAAGGACATTCTTCAGGAGAGAATACCATGGGTACCA
CCTGAATGCATTGAAAATCCTAAAAATTTAAATTTGGCAACAGACAAATGGAGTTTTGGT
ACCACTTTGTGGGAAATCTGCAGTGGAGGAGATAAACCTCTAAGTGCTCTGGATTCTCAA
AGAAAGCTACAATTTTATGAAGATAGGCATCAGCTTCCTGCACCAAAGTGGGCAGAATTA
GCAAACCTTATAAATAATTGTATGGATTATGAACCAGATTTCAGGCCTTCTTTCAGAGCC
ATCATACGAGATCTTAACAGTTTGTTTACTCCAGATTATGAACTATTAACAGAAAATGAC
ATGTTACCAAATATGAGGATAGGTGCCCTGGGGTTTTCTGGTGCCTTTGAAGACCGGGAT
CCTACACAGTTTGAAGAGAGACATTTGAAATTTCTACAGCAACTTGGCAAGGGTAATTTT
GGGAGTGTGGAGATGTGCCGGTATGACCCTCTACAGGACAACACTGGGGAGGTGGTCGCT
GTAAAAAAGCTTCAGCATAGTACTGAAGAGCACCTAAGAGACTTTGAAAGGGAAATTGAA
ATCCTGAAATCCCTACAGCATGACAACATTGTAAAGTACAAGGGAGTGTGCTACAGTGCT
GGTCGGCGTAATCTAAAATTAATTATGGAATATTTACCATATGGAAGTTTACGAGACTAT
CTTCAAAAACATAAAGAACGGATAGATCACATAAAACTTCTGCAGTACACATCTCAGATA
TGCAAGGGTATGGAGTATCTTGGTACAAAAAGGTATATCCACAGGGATCTGGCAACGAGA
AATATATTGGTGGAGAACGAGAACAGAGTTAAAATTGGAGATTTTGGGTTAACCAAAGTC
TTGCCACAAGACAAAGAATACTATAAAGTAAAAGAACCTGGTGAAAGTCCCATATTCTGG
TATGCTCCAGAATCACTGACAGAGAGCAAGTTTTCTGTGGCCTCAGATGTTTGGAGCTTT
GGAGTGGTTCTGTATGAACTTTTCACATACATTGAGAAGAGTAAAAGTCCACCAGCGGAA
TTTATGCGTATGATTGGCAATGACAAACAAGGACAGATGATCGTGTTCCATTTGATAGAA
CTTTTGAAGAATAATGGAAGATTACCAAGACCAGATGGATGCCCAGATGAGATCTATATG
ATCATGACAGAATGCTGGAACAATAATGTAAATCAACGCCCCTCCTTTAGGGATCTAGCT
CTTCGAGTGGATCAAATAAGGGATAACATGGCTGGATGA
GenBank Gene IDAF058925
GeneCard IDNone
GenAtlas IDJAK2
HGNC IDHGNC:6192
Chromosome Location9
Locus9p24
References
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