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FLASH GENE
Symbol CTSZ contributors: mct - updated : 11-05-2016
HGNC name cathepsin Z
HGNC id 2547
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
  • a very short proregion
  • a three residue insertion between Gly22 and Cys31
  • a highly conserved region of the catalytic triad,
  • a second insertion homologous to the occluding loop in CTSB
  • an RGD motif located in a highly exposed region of the propeptide, which may allow binding of the proenzyme to RGD-recognizing integrins
  • isoforms Precursor
    HOMOLOGY
    Homologene
    FAMILY papain family of thiol proteases
    CATEGORY enzyme
    SUBCELLULAR LOCALIZATION     plasma membrane
        intracellular
    intracellular,cytoplasm,organelle,membrane
    intracellular,cytoplasm,organelle,endoplasmic reticulum
    intracellular,cytoplasm,organelle,Golgi
    intracellular,cytoplasm,organelle,lysosome
    basic FUNCTION
  • placental cysteine proteinase, with putative exopeptidase activity
  • may be involved in tumorigenesis
  • has a restricted catalytic specificity
  • extracellular function of cathepsin Z may include binding to integrins thereby modulating the attachment of migrating cells to extracellular matrix components
  • with BLMH, are both cysteine proteases of a papain-like structure, and mediate N-terminal proteolysis and toxicity of mutant huntingtin
  • cysteine carboxypeptidase, that is involved in the regulation of T cell migration by interaction with ITGAL, ITGB2
  • potential role of cathepsin Z in bypassing cellular senescence
  • CTSL, CTSZ, account for the lysosome's capacity to digest polyQ sequences, and are important in defending against the accumulation and toxicity of polyQ proteins
  • several of the tumor-promoting functions of CTSZ were not dependent on its described catalytic activity but instead were mediated via the Arg-Gly-Asp (RGD) motif in the enzyme prodomain, which regulated interactions with integrins and the extracellular matrix
  • role for CTSZ in the anti-tumor immune response
  • predominantly supplied by tumor-associated macrophages, and is the compensatory protease that regulates the acquired tumor-promoting functions of lesions deficient in both CTSB and CTSS
  • CELLULAR PROCESS protein, degradation
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • interaction with ITGAL
  • it is likely that CTSL carries out initial cleavages yielding shorter peptides that are hydrolyzed to amino acids by CTSZ
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Other morbid association(s)
    TypeGene ModificationChromosome rearrangementProtein expressionProtein Function
    tumoral     --over  
    in high grade intraepithelial colorectal neoplasia and in early tumor stages
    Susceptibility
  • to tuberculosis
  • Variant & Polymorphism SNP
  • rs34069356 in the 3 prime UTR of CTSZ showed significant association with tuberculosis susceptibility
  • Candidate gene
    Marker
    Therapy target
    SystemTypeDisorderPubmed
    neurologyneurodegenerativehuntington chorea
    with BLMH, are potential novel targets for Huntington disease therapeutics
    ANIMAL & CELL MODELS