PAPOLA

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Identifiers
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External IDsGeneCards: [1]
Orthologs
SpeciesHumanMouse
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RefSeq (mRNA)

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Poly(A) polymerase alpha is an enzyme that in humans is encoded by the PAPOLA gene.[1][2][3]

PAPOLA binds to FIP1L1 (Factor interacting with PAPOLA and CPSF1), a subunit of the cleavage and polyadenylation specificity factor subunit 1 (CPSF1) complex. This complex polyadenylates the 3' end of precursor mRNAs (pre-mRNA) (see CPSF). CPSF1 is an RNA processing protein that binds to uracil-rich sequences in pre-mRNA, binds with and stimulates POPOLA's Polynucleotide adenylyltransferase activity, and thereby adds adenylyl residues to pre-mRNA. This poly-adenylyl action increases pre mRNA's maturation and movement from the nucleus to cytoplasm while dramatically increasing the stability of the mRNA formed from pre-mRNA: FIP1L1 is a Pre-mRNA 3'-end-processing factor. FIP1L1 gene fusions between it and either the platelet-derived growth factor receptor, alpha (PGDFRA) or Retinoic acid receptor alpha (RARA) genes are causes of certain human diseases associated with pathologically increased levels of blood eosinophils and/or Leukemias.[4][4]


References

  1. Thuresson AC, Astrom J, Astrom A, Gronvik KO, Virtanen A (Mar 1994). "Multiple forms of poly(A) polymerases in human cells". Proc Natl Acad Sci U S A. 91 (3): 979–83. doi:10.1073/pnas.91.3.979. PMC 521437. PMID 8302877.
  2. Yamauchi T, Sugimoto J, Hatakeyama T, Asakawa S, Shimizu N, Isobe M (Sep 1999). "Assignment of the human poly(A) polymerase (PAP) gene to chromosome 14q32.1-q32.2 and isolation of a polymorphic CA repeat sequence". J Hum Genet. 44 (4): 253–5. doi:10.1007/s100380050154. PMID 10429366.
  3. "Entrez Gene: PAPOLA poly(A) polymerase alpha".
  4. 4.0 4.1 https://www.ncbi.nlm.nih.gov/gene/81608

Further reading