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FLASH GENE
Symbol DEFB1 contributors: mct - updated : 30-05-2011
HGNC name defensin, beta 1
HGNC id 2766
PROTEIN
PHYSICAL PROPERTIES
STRUCTURE
motifs/domains
six disulfide-linked cysteines
HOMOLOGY
Homologene
FAMILY
CATEGORY immunity/defense
SUBCELLULAR LOCALIZATION extracellular
basic FUNCTION
  • cysteine-arginine rich antimicrobial peptide, implicated in the resistance to microbial colonization
  • involved in oxygen independent phagocytosis of Gram+, Gram- bacteria, many fungi, some viruses
  • component of the immune system which links the innate and adaptive immune responses
  • DEFA1 and DEFB1 promoted the up-regulation of CD91 on the dendritic cells surface
  • with DEFA1, inactivated both X4 and R5 HIV-1
  • cationic peptides produced by epithelial cells that have been proposed to be an important component of immune function at mucosal surfaces
  • one of the most prominent peptides of its class but despite ubiquitous expression by all epithelia, comparison with other defensins suggested only minor antibiotic killing activity
  • CELLULAR PROCESS
    PHYSIOLOGICAL PROCESS
    PATHWAY
    metabolism
    signaling
    a component
    INTERACTION
    DNA
    RNA
    small molecule
    protein
  • interacting with PAX2 (PAX2 represses DEFB1 expression through binding of the PAX2 homeodomain to the DEFB1 promoter in prostate cancer)
  • cell & other
    REGULATION
    ASSOCIATED DISORDERS
    corresponding disease(s)
    Susceptibility to Crohn disease
    Variant & Polymorphism other
  • genetic variations in the DEFB1 gene encoding constitutive beta-defensin 1 may be associated with the risk for Crohn disease
  • Candidate gene
  • candidate modifier gene of the CF pulmonary phenotype
  • Marker
    Therapy target
    ANIMAL & CELL MODELS