NAPSA Gene Summary [Human]

This gene encodes a member of the peptidase A1 family of aspartic proteases. The encoded preproprotein is proteolytically processed to generate an activation peptide and the mature protease. The activation peptides of aspartic proteinases function as inhibitors of the protease active site. These peptide segments, or pro-parts, are deemed important for correct folding, targeting, and control of the activation of aspartic proteinase zymogens. The encoded protease may play a role in the proteolytic processing of pulmonary surfactant protein B in the lung and may function in protein catabolism in the renal proximal tubules. This gene has been described as a marker for lung adenocarcinoma and renal cell carcinoma. [provided by RefSeq, Feb 2016]

Details

Type
Protein Coding
Official Symbol
NAPSA
Official Name
napsin A aspartic peptidase [Source:HGNC Symbol;Acc:HGNC:13395]
Ensembl ID
ENSG00000131400
Bio databases IDs NCBI: 9476 Ensembl: ENSG00000131400
Aliases napsin A aspartic peptidase, kidney-derived aspartic protease-like protein
Synonyms Asp 4, Aspartyl protease 4, KAP, Kdap, NAP1, NAPA, NAPSIN, Napsin 1, Napsin A, napsin A aspartic peptidase, pronapsin, SNAPA
Species
Human, Homo sapiens
OrthologiesMouseRat

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 NAPSA often fold into stable, three-dimensional structures and are associated with specific biological functions, such as binding to DNA, other proteins, or small molecules.
  • Xylanase inhibitor N-terminal
  • endopeptidase
  • peptidase
  • protein binding
  • Cellular and retroviral pepsin-like aspartate proteases
  • Eukaryotic aspartyl protease

Top Findings

The most significant associations for this gene, including commonly observed domains, pathway involvement, and functional highlights based on current data.
disease
  • cancer
  • epithelial cancer
  • epithelial neoplasia
  • neoplasia
  • lung adenocarcinoma
  • lung adenocarcinoma formation
  • pleural mesothelioma
  • mesothelioma formation
  • clear-cell ovarian carcinoma
  • clear cell ovarian cancer
regulated by
regulates
role in cell
  • proliferation

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
  • cellular membrane
  • endosomes
  • vesicles
  • lysosome
  • Endoplasmic Reticulum
  • alveolar epithelial lamellar bodies
  • multivesicular bodies
  • Golgi vesicles
  • phagosomes
  • plasma

Gene Ontology Annotations

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

Biological Process

Functions and activities the gene product is involved in
  • membrane protein proteolysis
  • proteolysis
  • surfactant homeostasis

Cellular Component

Where in the cell the gene product is active
  • extracellular space
  • extracellular vesicular exosome
  • alveolar lamellar body
  • lysosome

Molecular Function

What the gene product does at the molecular level
  • protein binding
  • aspartic-type endopeptidase activity
  • endopeptidase activity
  • peptidase activity

Gene-Specific Assays for Results You Can Trust

Streamline your workflow with assays designed for this gene. Our targeted dPCR and qPCR assays help you generate meaningful data – efficiently and accurately.