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FLASH GENE
Symbol SPAG9 contributors: mct - updated : 29-05- 201
HGNC name sperm associated antigen 9
HGNC id 14524
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • N terminal extracellular leucine zipper motif and multiple repeats (five direct, three mirror)
  • three unique palindromic motifs
  • transmembrane helical domain
  • coiled coil, leucine zipper domain, essential for dimerization and proper localization
  • C terminal cytoplasmic domain
  • HOMOLOGY
    interspecies homolog to Drosophila sunday driver
    intraspecies homolog to MAPK8IP1
    homolog to MAPK8IP3
    Homologene
    FAMILY
  • JNK-interacting protein family
  • CATEGORY antigen
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,cytosolic,vesicle
    basic FUNCTION
  • mediating the axonal transport of at least 1 class of vesicles by interacting directly with kinesin light chain
  • sperm-associated JNK-binding protein, having a functional role in sperm-egg fusion
  • involvement of SPAG9 mediated signal transduction pathways in reproductive processes
  • its expression may play a role in cellular growth and thyroid carcinogenesis
  • may have a role in tumor development and early spread and thus could serve as a novel target for early detection and for cancer immunotherapy
  • acts together with MAPK8IP3 to promote presynaptic assembly
  • novel role of a scaffolding protein SPAG9 in the regulation of surface CD40 expression and fine-tuning of dendritic cells function
  • MAPK8IP3 and SPAG9 are critical and functionally redundant in cytokinesis and control ARF6 localization to the midbody by forming a tripartite complex of MAPK8IP3/SPAG9, active ARF6, and kinesin-1
  • novel role of SPAG9 scaffold protein in the bridging of CD40LG-triggered CD40 internalization and CD40-dependent signaling in splenic B lymphocytes
  • MAPK8IP3, SPAG9 are positive regulators of kinesin-1-dependent axonal transport, which prevents neuronal degeneration
  • SPAG9 and MAPK8IP3 play critical roles in kinesin-1-dependent axonal transport, which prevents brain neuronal degeneration
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • interacting with KLC1 as a binding partner for the second leucine zipper domain (involves leucine zipper-like domains and support the role of motor proteins in the spatial regulation of signaling modules)
  • novel target protein of the active form of ARF6
  • MAPK8IP3, SPAG9 which might be paralogous to each other, are critical and functionally redundant in cytokinesis and control ARF6 localization to the midbody by forming a tripartite complex of MAPK8IP3/SPAG9, active ARF6, and kinesin-1
  • PLK1 binding to SPAG9 was found in G2 phase and mitosis, and PLK1 binding was self-primed by PLK1 phosphorylation of SPAG9
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
  • new type of endometrial cancer markers for early detection, diagnosis and treatment
  • Therapy target
    SystemTypeDisorderPubmed
    cancerhemopathy 
    potential of SPAG9 as a biomarker and immunotherapeutic target for early treatment of chronic myeloid leukemia -chronic phase patients
    cancerendocrinethyroid
    diagnostic biomarker as well as a possible therapeutic target in thyroid cancer treatment
    ANIMAL & CELL MODELS