Artemis (protein)

Source: Wikipedia, the free encyclopedia.
DCLRE1C
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)
RefSeq (protein)
Location (UCSC)Chr 10: 14.9 – 14.95 MbChr 2: 3.43 – 3.47 Mb
PubMed search[3][4]
Wikidata
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Artemis is a protein that in humans is encoded by the DCLRE1C (DNA cross-link repair 1C) gene.[5][6]

Function

Artemis is a nuclear protein that is involved in V(D)J recombination and DNA repair. The protein has endonuclease activity on 5' and 3' overhangs and hairpins when complexed with PRKDC.[7]

Immune response

Artemis plays an essential role in

severe combined immune deficiency (SCID). Artemis was first identified as the gene defective in a subset of SCID patients that were unusually sensitive to radiation
.

Repair of DNA breaks

Cells deficient in Artemis are more sensitive than normal cells to X‑rays[5] and to chemical agents that induce double-strand breaks (DSBs),[10] and they show a higher incidence of chromosome breaks following irradiation.[11] Direct measurement of DSBs by pulsed-field electrophoresis indicates that in Artemis-deficient cells 75-90% of DSBs are repaired rapidly, just as in normal cells. However, the remaining 10-20% of DSBs that are repaired more slowly (2-24 hr) in normal cells, are not repaired at all in Artemis-deficient cells.[12] Repair of these presumably difficult-to-rejoin breaks also requires several other proteins, including the Mre11/Rad50/NBS1 complex, the ataxia telangiectasia mutated ATM kinase, and 53BP1. Because Artemis can remove damaged ends from DNA,[10] it has been proposed that these DSBs are those whose damaged ends require trimming by Artemis. However, evidence that both ATM and Artemis are specifically required for repair of DSBs in heterochromatin,[13][14] has called this interpretation into question.

Artemis functions in the repair of DNA

double-strand breaks that arise by induced oxidative reactions, or by endogenous reactions.[15] Such DNA repair occurs in heterochromatin as well as in euchromatin
.

Clinical significance

Mutations in this gene cause Athabascan-type severe combined immunodeficiency (SCIDA).[16]

Interactions

DCLRE1C has been shown to

interact with DNA-PKcs.[17]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000152457Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000026648Ensembl, 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. ^
    S2CID 12610896
    .
  6. .
  7. ^ "Protein Knowledgebase: Gene DCLRE1C - DNA cross-link repair 1C protein (Protein artemis)". Retrieved June 2, 2011.
  8. PMID 19731800
    .
  9. .
  10. ^ .
  11. .
  12. .
  13. .
  14. .
  15. .
  16. ^ "Entrez Gene: DCLRE1C DNA cross-link repair 1C (PSO2 homolog, S. cerevisiae)".
  17. S2CID 7575525
    .

Further reading

External links