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FLASH GENE
Symbol SACS contributors: mct/npt/pgu/shn - updated : 04-05-2012
HGNC name spastic ataxia of Charlevoix-Saguenay (sacsin)
HGNC id 10519
RNA
TRANSCRIPTS type messenger
identificationnb exonstypebpproduct
ProteinkDaAAspecific expressionYearPubmed
10 - 15639 520 4579 cortex, cerebellum and midbrain - 19208651
EXPRESSION
Type widely
   expressed in (based on citations)
organ(s)
SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
Nervousbrainhindbraincerebellum highly Homo sapiens
 braindiencephalonamygdala  
 spinal cord   highly
Reproductivefemale systemuterus  highly
tissue
SystemTissueTissue level 1Tissue level 2LevelPubmedSpeciesStageRna symbol
Muscularstriatumskeletal  
Nervouscentral  highly Homo sapiens
cells
SystemCellPubmedSpeciesStageRna symbol
Nervousneuron Homo sapiens
NervousPurkinje cell Homo sapiens
cell lineage
cell lines
fluid/secretion
at STAGE
physiological period fetal
Text eye: lens, anterior segment, optic nerve, retina
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • two a head shock protein (HSP90) homology domains in the N terminal region, and a putative ubiquitin-like (UbL) domain for an interaction with the proteasome
  • two leucine zippers
  • a sacsin repeat region
  • seven nuclear localization signals (NLS)
  • three coiled-coils and one hydrophilic domain within the carboxy terminal half of the protein and a DNAJ motif at the C terminus, and an HEPN (higher eukaryotes and prokaryotes nucleotide-binding) domain that dimerizes and contains a high-affinity binding site for GTP, and also contains a protein-protein interaction J-domain, the defining feature of DnaJ/Hsp40 proteins
  • secondary structure
  • five parallel alpha-helices with a large loop of several short helical segments
  • HOMOLOGY
    interspecies ortholog to Sacs, Mus musculus
    ortholog to Sacs, Rattus norvegicus
    ortholog to SACS, Pan troglodytes
    Homologene
    FAMILY
    CATEGORY chaperone/stress
    SUBCELLULAR LOCALIZATION     intracellular
    intracellular,cytoplasm,organelle,mitochondria
    text
  • predominantly cytoplasmic with a mitochondrial component
  • associated with mitochondria and may play a role in mitochondrial quality control, as observed for other proteins associated with neurodegenerative diseases
  • basic FUNCTION
  • may be functioning in chaperone-mediated protein folding
  • may integrate the ubiquitin–proteasome system and Hsp70 function to a specific cellular role
  • regulator of the Hsp70 chaperone machinery that is implicated in the processing of other ataxia-linked proteins
  • may act as a molecular scaffold for assembly of a specific protein complex and regulation of this complex requires integration of molecular chaperone machinery and the ubiquitin–proteasome systems (UPS)
  • role for sacsin in regulation of mitochondrial dynamics
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • potential substrate of the ubiquitin ligase UBE3A responsible for Angelman syndrome
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s) SACS
    Susceptibility
    Variant & Polymorphism
    Candidate gene
    Marker
    Therapy target
    ANIMAL & CELL MODELS