HP Gene Summary

This gene encodes a preproprotein, which is processed to yield both alpha and beta chains, which subsequently combine as a tetramer to produce haptoglobin. Haptoglobin functions to bind free plasma hemoglobin, which allows degradative enzymes to gain access to the hemoglobin, while at the same time preventing loss of iron through the kidneys and protecting the kidneys from damage by hemoglobin. Mutations in this gene and/or its regulatory regions cause ahaptoglobinemia or hypohaptoglobinemia. This gene has also been linked to diabetic nephropathy, the incidence of coronary artery disease in type 1 diabetes, Crohn's disease, inflammatory disease behavior, primary sclerosing cholangitis, susceptibility to idiopathic Parkinson's disease, and a reduced incidence of Plasmodium falciparum malaria. The protein encoded also exhibits antimicrobial activity against bacteria. A similar duplicated gene is located next to this gene on chromosome 16. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2014]

Details

Type
Protein Coding
Official Symbol
HP
Official Name
haptoglobin [Source:HGNC Symbol;Acc:HGNC:5141]
Ensembl ID
ENSG00000257017
Bio databases IDs NCBI: 3240 Ensembl: ENSG00000257017
Aliases haptoglobin
Synonyms
Ba1-647,BP,haptoglobin,HAPTOGLOBIN-1 alpha-2 CHAIN,HAPTOGLOBIN 1 precursor,HAPTOGLOBIN-1 α-2 CHAIN,HAPTOGLOBIN-2 alpha-2 CHAIN,HAPTOGLOBIN-2 α-2 CHAIN,HAPTOGLOBIN alpha 2FS-beta,HAPTOGLOBIN α 2FS-β,HP-1,hp2-alpha,HP2ALPHA2,hp2-α,HPA1S,preHP2,PreR-Co,Zon1
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 often fold into stable, three-dimensional structures and are associated with specific biological functions, such as binding to DNA, other proteins, or small molecules.
  • CCP
  • Trypsin-like serine protease
  • trypsin
  • Tryp_SPc
  • peptidase
  • protein binding
  • loop domain
  • hemoglobin binding
  • identical protein binding
  • SUSHI repeat

Pathways

Biological processes and signaling networks where the HP gene plays a role, providing insight into its function and relevance in health or disease.

Top Findings

The most significant associations for this gene, including commonly observed domains, pathway involvement, and functional highlights based on current data.
disease
  • Alzheimer disease
  • adenoma formation
  • epithelial cancer
  • hepatocellular carcinoma
  • acute myeloid leukemia
  • breast cancer
  • rheumatoid arthritis
  • anhaptoglobinemia
  • sepsis
  • liver cancer
regulated by
regulates
  • STAT3
  • HMOX1
  • reactive oxygen species
  • heavy metal
  • hydrogen peroxide
  • nitric oxide
  • malondialdehyde
  • HBB
  • EGFR
  • FOS
role in cell
  • activation in
  • expression in
  • migration
  • endocytosis by
  • chemotaxis
  • number
  • uptake by
  • transactivation in
  • osteoclastogenesis
  • injury

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
  • blood microparticle
  • secretory granule lumen
  • organelle lumens
  • Nucleus
  • endosomes
  • cytosol
  • cellular protrusions
  • perikaryon
  • plasma

Gene Ontology Annotations

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

biological PROCESS

Functions and activities the gene product is involved in
  • negative regulation of oxidoreductase activity
  • negative regulation of hydrogen peroxide catabolic process
  • response to hydrogen peroxide
  • defense response
  • defense response to bacterium
  • acute-phase response
  • immune system process

cellular COMPONENT

Where in the cell the gene product is active
  • extracellular space
  • extracellular vesicular exosome
  • specific granule lumen
  • endocytic vesicle lumen
  • blood microparticle
  • haptoglobin-hemoglobin complex
  • extracellular region

molecular FUNCTION

What the gene product does at the molecular level
  • protein binding
  • antioxidant activity
  • hemoglobin binding
  • serine-type endopeptidase 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.