PAPOLA
Poly(A) polymerase alpha
Also known as: PAP, PAPOA_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P51003
- Gene
- PAPOLA
- Ensembl
- ENSG00000090060
- Chromosome
- 14
- Canonical length
- 745 aa
- Protein class
- Enzymes, Metabolic proteins, Plasma proteins, Predicted intracellular proteins, Predicted membrane proteins
- Subcellular location
- Nucleoplasm
OverviewNCBI Gene
The protein encoded by this gene belongs to the poly(A) polymerase family. It is required for the addition of adenosine residues for the creation of the 3'-poly(A) tail of mRNAs. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2011]
Canonical amino-acid sequenceUniProt
745 residues, UniProt reviewed canonical sequence.
>P51003|PAPOLA
1 MPFPVTTQGS QQTQPPQKHY GITSPISLAA PKETDCVLTQ KLIETLKPFG VFEEEEELQR
61 RILILGKLNN LVKEWIREIS ESKNLPQSVI ENVGGKIFTF GSYRLGVHTK GADIDALCVA
121 PRHVDRSDFF TSFYDKLKLQ EEVKDLRAVE EAFVPVIKLC FDGIEIDILF ARLALQTIPE
181 DLDLRDDSLL KNLDIRCIRS LNGCRVTDEI LHLVPNIDNF RLTLRAIKLW AKRHNIYSNI
241 LGFLGGVSWA MLVARTCQLY PNAIASTLVH KFFLVFSKWE WPNPVLLKQP EECNLNLPVW
301 DPRVNPSDRY HLMPIITPAY PQQNSTYNVS VSTRMVMVEE FKQGLAITDE ILLSKAEWSK
361 LFEAPNFFQK YKHYIVLLAS APTEKQRLEW VGLVESKIRI LVGSLEKNEF ITLAHVNPQS
421 FPAPKENPDK EEFRTMWVIG LVFKKTENSE NLSVDLTYDI QSFTDTVYRQ AINSKMFEVD
481 MKIAAMHVKR KQLHQLLPNH VLQKKKKHST EGVKLTALND SSLDLSMDSD NSMSVPSPTS
541 ATKTSPLNSS GSSQGRNSPA PAVTAASVTN IQATEVSVPQ VNSSESSGGT SSESIPQTAT
601 QPAISPPPKP TVSRVVSSTR LVNPPPRSSG NAATSGNAAT KIPTPIVGVK RTSSPHKEES
661 PKKTKTEEDE TSEDANCLAL SGHDKTEAKE QLDTETSTTQ SETIQTAASL LASQKTSSTD
721 LSDIPALPAN PIPVIKNSIK LRLNRLocalizationUniProt · AlphaFold · HPA
Whether an antibody against PAPOLA can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Intracellular
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.4
- Highest tissue expression
- 91 nTPM
Expression across tissuesHPA
Tissue
- bone marrow: 91 nTPM
- thymus: 87 nTPM
- retina: 86 nTPM
- placenta: 80 nTPM
- tonsil: 78 nTPM
- liver: 76 nTPM
Single-cell type
- syncytiotrophoblasts: 1,283 nCPM
- early spermatids: 639 nCPM
- esophageal apical cells: 615 nCPM
- endometrial luminal cells: 601 nCPM
- late primary spermatocytes: 586 nCPM
- extravillous trophoblasts: 579 nCPM
Immune cell
- basophil: 73 nTPM
- eosinophil: 56 nTPM
- naive B-cell: 43 nTPM
- neutrophil: 42 nTPM
- NK-cell: 41 nTPM
- intermediate monocyte: 39 nTPM
Brain region
- white matter: 121 nTPM
- cerebellum: 105 nTPM
- choroid plexus: 103 nTPM
- hypothalamus: 93 nTPM
- basal ganglia: 90 nTPM
- medulla oblongata: 90 nTPM
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.18
- gnomAD pLI
- 1
- gnomAD missense Z
- 3.55
- DepMap mean gene effect
- -0.18
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 6% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- co-transcriptional mRNA 3'-end processing, cleavage and polyadenylation pathway
- cytosolic mRNA polyadenylation
- mRNA 3'-end processing
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
- Poly(A) polymerase, RNA-binding domain
- Poly(A) polymerase, central domain
- Nucleotidyltransferase, class I-like, C-terminal
- Poly(A) polymerase
- Nucleotidyltransferase superfamily
- Poly(A) polymerase, nucleotidyltransferase domain
- Poly(A) polymerase predicted RNA binding domain
- Poly(A) polymerase central domain
- Poly(A) polymerase nucleotidyltransferase domain
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of PAPOLA in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads PAPOLA as an antibody target. Whether an autoantibody or antibody against PAPOLA could matter depends on whether native PAPOLA is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
PAPOLA is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label PAPOLA as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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