DEFA4

Last updated
DEFA4
PDB 1zmm EBI.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases DEFA4 , DEF4, HNP-4, HP-4, HP4, defensin alpha 4
External IDs OMIM: 601157; MGI: 3711900; HomoloGene: 48059; GeneCards: DEFA4; OMA:DEFA4 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001925

NM_001177481

RefSeq (protein)

NP_001916

NP_001170952

Location (UCSC) Chr 8: 6.94 – 6.94 Mb Chr 8: 21.56 – 21.56 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Defensin, alpha 4 (DEFA4), also known as neutrophil defensin 4 or HNP4, is a human defensin peptide that is encoded by the DEFA4 gene. [5] [6] HNP4 is expressed in the granules of the neutrophil where it defends the host against bacteria [7] and viruses. [8]

Contents

Function

Defensins are a peptide family of cytotoxic microbicides involved in innate immunity. [9] Members of the defensin family are distinguished by a conserved six-cysteine motif. Several human alpha defensin genes including HNP4 are clustered on chromosome 8. DEFA4 differs from other defensin genes by an extra 83-base segment that is apparently the result of a recent duplication within the coding region. HNP4 inhibits corticotropin-stimulated corticosterone production. [5]

References

  1. 1 2 3 ENSG00000285318 GRCh38: Ensembl release 89: ENSG00000164821, ENSG00000285318 Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000061845 Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. 1 2 "Entrez Gene: DEFA4; defensin, alpha 4, corticostatin (Homo sapiens)".
  6. Wu Z, Ericksen B, Tucker K, Lubkowski J, Lu W (September 2004). "Synthesis and characterization of human alpha-defensins 4-6". The Journal of Peptide Research. 64 (3): 118–25. doi:10.1111/j.1399-3011.2004.00179.x. PMID   15317502.
  7. Ericksen B, Wu Z, Lu W, Lehrer RI (January 2005). "Antibacterial activity and specificity of the six human {alpha}-defensins". Antimicrobial Agents and Chemotherapy. 49 (1): 269–75. doi:10.1128/AAC.49.1.269-275.2005. PMC   538877 . PMID   15616305.
  8. Wu Z, Cocchi F, Gentles D, Ericksen B, Lubkowski J, Devico A, et al. (January 2005). "Human neutrophil alpha-defensin 4 inhibits HIV-1 infection in vitro". FEBS Letters. 579 (1): 162–6. doi: 10.1016/j.febslet.2004.11.062 . PMID   15620707. S2CID   84062495.
  9. Ganz T, Selsted ME, Szklarek D, Harwig SS, Daher K, Bainton DF, Lehrer RI (October 1985). "Defensins. Natural peptide antibiotics of human neutrophils". The Journal of Clinical Investigation. 76 (4): 1427–35. doi:10.1172/JCI112120. PMC   424093 . PMID   2997278.

Further reading