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FLASH GENE
Symbol HSPB2 contributors: mct - updated : 12-11-2016
HGNC name heat shock 27kDa protein 2
HGNC id 5247
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • an N terminus involved in multimerization
  • a C terminus with the alpha crystallin domain responsible for chaperone function
  • conjugated PhosphoP
    HOMOLOGY
    interspecies ortholog to rattus Hspb2 (97.3pc)
    ortholog to murine Hspb2 (96.7pc)
    Homologene
    FAMILY
  • alpha crystallin/small hsp family
  • small heat shock protein (HSP20) family
  • CATEGORY chaperone/stress
    SUBCELLULAR LOCALIZATION     plasma membrane,junction
        intracellular
    intracellular,cytoplasm,cytosolic
    intracellular,cytoplasm,cytoskeleton
    intracellular,nucleus,nucleoplasm
    intracellular,nucleus,chromatin/chromosome
    intracellular,nucleus,nucleolus
    text myofibrils, neuromuscular junctions
    basic FUNCTION
  • potentially involved in chaperone activity
  • involved in maintenance of cytoskeletal network in muscle (potential role in pathogenesis of myotonic dystrophy)
  • acting as an enzyme activator
  • protects hippocampal progenitor cells from glucocorticoid-induced apoptotic cell death
  • role in regulating AKT1 activation and cellular apoptosis by mediating interaction between AKT1 and its upstream activator MAPKAPK2
  • may be involved in the pathogenesis of myotonic dystrophy and contribute to the neuropathology in both Alzheimer disease and hereditary cerebral hemorrhage with amyloidosis, Dutch type
  • ADP-induced phosphorylation of HSP27 via MAPK3 and/or MAPK14 is sufficient for platelet granule secretion but not for platelet aggregation
  • chaperone of the myotonic dystrophy protein kinase, having a function as a novel inhibitor of apical caspase activation in the extrinsic apoptotic pathway
  • inhibits the extrinsic apoptotic pathway by suppressing apical caspases-8 and 10 activation, thereby blocking downstream apoptotic events, such as BID cleavage and caspase-3 activation
  • anti-apoptotic protein that negatively regulates apical caspase activation in the extrinsic apoptotic pathway
  • may be playing a new role in the antiapoptotic action triggered by 17beta-estradiol by modulating CASP3 activity and stabilizing EESR2 in skeletal muscle cells
  • facilitates the palmitoylation and plasma membrane translocation of the three classes of sex steroid receptors
  • multifunctional protein that participates in ubiquitination of proteins for their degradation by proteasomes
  • modulates HNRNPD proteolysis and AU-rich element-mediated mRNA degradation
  • CELLULAR PROCESS cell life, differentiation
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
  • complexing with HSPB3 during myogenic differentiation, but biochemical properties of the HSPB2/B3 complex are distinctly different from those of other small heat-shock proteins, indicating that the HSPB2/B3 assembly is likely to possess cellular functions other than those of its family members
  • phosphorylated by the kinase mitogen-activated protein kinase-activated protein kinase 2
  • INTERACTION
    DNA
    RNA
    small molecule
    protein
  • binding and activating MDPK
  • HSPB8
  • interacts with estrogen receptors (ER) beta (ESR2) in mitochondria
  • binds to a motif in estrogen receptor alpha (ESR1) and promotes palmitoylation of the steroid receptors
  • facilitates the trafficking of endogenous ESR1 to the plasma membrane
  • TGFB1I1 and HSPB1, HSPB2 are effectors of NOX4 required for TGFB1-stimulated Focal adhesions (FAs) formation, adhesion strength and migration in vascular smooth muscle cell
  • EXOC3 is involved in the enhancement of cell migration and suppression of apoptosis through the activation of HSPB1, HSPB2 or MAPK14 phosphorylation
  • cell & other
    REGULATION
    induced by not induced by heat shock
    Other
  • phosphorylated by the kinase mitogen-activated protein kinase-activated protein kinase 2
  • ASSOCIATED DISORDERS
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    constitutional     --over  
    confers long-lasting neuroprotection against ischemic brain injury via a previously unexplored association and inhibition of MAP3K5 signaling
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
  • target for interrupting signaling from membrane sex steroid receptors to tumor biology in hormone-responsive cancers )
  • ANIMAL & CELL MODELS
  • downregulation of Hspb2 improved the maturation of mouse oocytes, while increased early stage of apoptosis in oocytes by inducing the activation of extrinsic, caspase 8-mediated pathway