Poly(A)-specific ribonuclease (PARN), also known as polyadenylate-specific ribonuclease or deadenylating nuclease (DAN), is an enzyme that in humans is encoded by the PARN gene.[5][6]

Quick Facts PARN, Available structures ...
PARN
Available structures
PDBOrtholog search: PDBe RCSB
Identifiers
AliasesPARN, DAN, DKCB6, PFBMFT4, Poly(A)-specific ribonuclease
External IDsOMIM: 604212; MGI: 1921358; HomoloGene: 31098; GeneCards: PARN; OMA:PARN - orthologs
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_001134477
NM_001242992
NM_002582

NM_028761
NM_001358452
NM_001358453

RefSeq (protein)

NP_001127949
NP_001229921
NP_002573

NP_083037
NP_001345381
NP_001345382

Location (UCSC)Chr 16: 14.44 – 14.63 MbChr 16: 13.36 – 13.49 Mb
PubMed search[3][4]
Wikidata
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Function

Exonucleolytic degradation of the poly(A) tail is often the first step in the decay of eukaryotic mRNAs. The amino acid sequence of poly(A)-specific ribonuclease shows homology to the RNase D family of 3'-exonucleases. The protein appears to be localized in both the nucleus and the cytoplasm. It is not stably associated with polysomes or ribosomal subunits.[6] Hereditary mutations in PARN lead to the bone marrow failure disease dyskeratosis congenita which is caused by defective telomerase RNA processing and degradation in patients.[7][8][9][10][11][12][13]

References

Further reading

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