Seroatlas · Human Serome Atlas

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 LRLNR

LocalizationUniProt · 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

Molecular functions

Cellular components

Protein domainsUniProt · Pfam · InterPro

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.

Canonical record: https://seroatlas.com/gene/PAPOLA. Study-independent annotations aggregated from UniProt, Human Protein Atlas, PubMed, IEDB, Pfam, InterPro, Gene Ontology, AlphaFold, gnomAD, DepMap, ClinVar, TCGA. Catalog release seroatlas-reviewed-human-uniprot-20260313.

Seroatlas is the reference for exploring autoantibody and antibody serology at the human-protein level: the autoreactome and human serome, multiplex serology (HuProt, HuScan, VirScan, PhIP-Seq).

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