Article · Wikipedia archive · Last revised Jun 26, 2026

DLK1

Protein delta homolog 1, delta like non-canonical Notch ligand 1, fetal antigen 1 or preadipocyte factor 1 is a protein that in humans is encoded by the DLK1 gene.

Last revised
Jun 26, 2026
Read time
≈ 5 min
Length
1,238 w
Citations
18
Source
DLK1
Identifiers
AliasesDLK1, DLK, DLK-1, Delta1, FA1, PREF1, Pref-1, ZOG, pG2, AW742678, DlkI, Ly107, Peg9, SCP1, delta like non-canonical Notch ligand 1
External IDsOMIM: 176290; MGI: 94900; HomoloGene: 2846; GeneCards: DLK1; OMA:DLK1 - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001032997
NM_003836
NM_001317172

NM_001190703
NM_001190704
NM_001190705
NM_010052

RefSeq (protein)

NP_001304101
NP_003827
NP_003827.3

NP_001177632
NP_001177633
NP_001177634
NP_034182

Location (UCSC)Chr 14: 100.73 – 100.74 MbChr 12: 109.42 – 109.43 Mb
PubMed search34
Wikidata
View/Edit HumanView/Edit Mouse

Protein delta homolog 1, delta like non-canonical Notch ligand 1, fetal antigen 15 or preadipocyte factor 16 is a protein that in humans is encoded by the DLK1 gene.789

It is expressed as a transmembrane protein, but a soluble form cleaved off by ADAM17 is active in inhibiting adipogenesis,10 the differentiation of pre-adipocytes into adipocytes.11

It is a member of the EGF-like family of homeotic proteins.12

Part of the Dlk1-DIO3 imprinting control region, this gene is one involved in the epigenetic process that causes a subset of genes to be regulated based on their parental origin.13

Such imprinted genes are required for the formation of the placenta as well as the development of cellular lineages such as those derived from the mesoderm and ectoderm.14

References

References

  1. GRCh38: Ensembl release 89: ENSG00000185559Ensembl, May 2017
  2. GRCm38: Ensembl release 89: ENSMUSG00000040856Ensembl, 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. Jensen C, Teisner B, Højrup P, Rasmussen H, Madsen O, Nielsen B, Skjødt K (1993). "Studies on the isolation, structural analysis and tissue localization of fetal antigen 1 and its relation to a human adrenal-specific cDNA, pG2". Human Reproduction. 8 (4): 635–641. doi:10.1093/oxfordjournals.humrep.a138110. PMID 8501199.
  6. Smas CM, Sul HS (1993). "Pref-1, a protein containing EGF-like repeats, inhibits adipocyte differentiation". Cell. 73 (4): 725–734. doi:10.1016/0092-8674(93)90252-L. PMID 8500166. S2CID 23634189.
  7. Laborda J, Sausville EA, Hoffman T, Notario V (1993). "dlk, a Putative Mammalian Homeotic Gene Differentially Expressed in Small Cell Lung Carcinoma and Neuroendocrine Tumor Cell Line". The Journal of Biological Chemistry. 268 (6): 3817–20. doi:10.1016/S0021-9258(18)53544-4. PMID 8095043.
  8. Jensen CH, Krogh TN, Højrup P, Clausen PP, Skjødt K, Larsson LI, Enghild JJ, Teisner B (1994). "Protein Structure of Fetal Antigen 1 (FA1). A Novel Circulating Human Epidermal-Growth-Factor-Like Protein Expressed in Neuroendocrine Tumors and its Relation to the Gene Products of Dlk and pG2". European Journal of Biochemistry. 225 (1): 83–92. doi:10.1111/j.1432-1033.1994.00083.x. PMID 7925474.
  9. EntrezGene 8788
  10. Wang Y, Sul HS (2009). "Pref-1 Regulates Mesenchymal Cell Commitment and Differentiation through Sox9". Cell Metabolism. 9 (3): 287–302. doi:10.1016/j.cmet.2009.01.013. PMC 2673480. PMID 19254573.
  11. Adipogenesis at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
  12. Laborda J (2000). "The role of the epidermal growth factor-like protein dlk in cell differentiation". Histology and Histopathology. 15 (1): 119–29. PMID 10668203.
  13. Lin SP, Coan P, da Rocha ST, Seitz H, Cavaille J, Teng PW, Takada S, Ferguson-Smith AC (Jan 2007). "Differential regulation of imprinting in the murine embryo and placenta by the Dlk1-Dio3 imprinting control region". Development. 134 (2): 417–426. doi:10.1242/dev.02726. PMID 17166925.
  14. Hernandez A, Fiering S, Martinez E, Galton VA, St Germain D (Nov 2002). "The gene locus encoding iodothyronine deiodinase type 3 (Dio3) is imprinted in the fetus and expresses antisense transcripts". Endocrinology. 143 (11): 4483–4486. doi:10.1210/en.2002-220800. PMID 12399446.
Further reading

Further reading