KLK3 Gene Summary [Human]

Kallikreins are a subgroup of serine proteases having diverse physiological functions. Growing evidence suggests that many kallikreins are implicated in carcinogenesis and some have potential as novel cancer and other disease biomarkers. The gene is one of the fifteen kallikrein subfamily members located in a cluster on chromosome 19. It encodes a single-chain glycoprotein, a protease which is synthesized in the epithelial cells of the prostate gland, and is present in seminal plasma. It is thought to function normally in the liquefaction of seminal coagulum, presumably by hydrolysis of the high molecular mass seminal vesicle protein. The serum level of this protein, called PSA in the clinical setting, is useful in the diagnosis and monitoring of prostatic carcinoma. Alternate splicing of this gene generates several transcript variants encoding different isoforms. [provided by RefSeq, Dec 2019]

Details

Type
Protein Coding
Official Symbol
KLK3
Official Name
kallikrein related peptidase 3 [Source:HGNC Symbol;Acc:HGNC:6364]
Ensembl ID
ENSG00000142515
Bio databases IDs NCBI: 354 Ensembl: ENSG00000142515
Aliases kallikrein related peptidase 3, prostate specific antigen
Synonyms APS, hK3, kallikrein related peptidase 3, KLK2A1, Prostate-Specific Antigen, PSA, γ-seminoprotein
Species
Human, Homo sapiens

Protein Domains

A protein domain is a distinct structural or functional region within a protein that can evolve, function, and exist independently of the rest of the protein chain. These domains in human KLK3 often fold into stable, three-dimensional structures and are associated with specific biological functions, such as binding to DNA, other proteins, or small molecules.
  • semenogelase
  • Trypsin-like serine protease
  • endopeptidase
  • serine endopeptidase
  • trypsin
  • Tryp_SPc
  • serine-type peptidase
  • linear amide carbon-nitrogen bond hydrolase
  • peptidase
  • Trypsin-like peptidase domain
  • protein binding

Top Findings

The most significant associations for this gene, including commonly observed domains, pathway involvement, and functional highlights based on current data.
disease
  • breast carcinoma
  • prostatic carcinoma
  • prostate cancer
  • epithelial cancer
  • castration refractory prostate cancer
  • prostatic intraepithelial neoplasia
  • cancer
  • prostatic neoplasm
  • prostatitis
  • prostatic neoplasia
regulated by
regulates
role in cell
  • proliferation
  • differentiation
  • apoptosis
  • survival
  • migration
  • quantity
  • adhesion
  • invasion
  • G1 phase
  • immune response

Subcellular Expression

Locations within the cell where the protein is known or predicted to be active, providing insight into its function and cellular context.
  • Extracellular Space
  • Cytoplasm
  • secretory vesicles
  • cellular protrusions
  • plasma

Gene Ontology Annotations

Describes the biological processes, cellular components, and molecular functions associated with the human KLK3 gene, providing context for its role in the cell.

Biological Process

Functions and activities the gene product is involved in
  • protein metabolic process
  • negative regulation of angiogenesis
  • positive regulation of antibacterial peptide production
  • proteolysis

Cellular Component

Where in the cell the gene product is active
  • nucleus
  • extracellular space
  • extracellular vesicular exosome
  • secretory granule
  • macromolecular complex
  • extracellular region

Molecular Function

What the gene product does at the molecular level
  • hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amides
  • protein binding
  • serine-type endopeptidase activity
  • serine-type peptidase activity
  • endopeptidase activity

Gene-Specific Assays for Results You Can Trust

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