PABPC1 poly(A) binding protein cytoplasmic 1 [ Homo sapiens (human) ]

Gene ID: 26986, updated on 4-Feb-2026

Summary

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Official Symbol: PABPC1provided by HGNC
Official Full Name: poly(A) binding protein cytoplasmic 1provided by HGNC
Primary source: HGNC:HGNC:8554
See related: Ensembl:ENSG00000070756 MIM:604679; AllianceGenome:HGNC:8554
Gene type: protein coding
RefSeq status: REVIEWED
Organism: Homo sapiens
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as: PAB1; PABP; PABP1; PABPC2; PABPL1
Summary: This gene encodes a poly(A) binding protein. The protein shuttles between the nucleus and cytoplasm and binds to the 3' poly(A) tail of eukaryotic messenger RNAs via RNA-recognition motifs. The binding of this protein to poly(A) promotes ribosome recruitment and translation initiation; it is also required for poly(A) shortening which is the first step in mRNA decay. The gene is part of a small gene family including three protein-coding genes and several pseudogenes.[provided by RefSeq, Aug 2010]
Expression: Ubiquitous expression in esophagus (RPKM 345.6), urinary bladder (RPKM 280.1) and 25 other tissues See more
Orthologs: all
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Genomic context

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See PABPC1 in Genome Data Viewer

Location:: 8q22.3

Exon count:: 15

Annotation release	Status	Assembly	Chr	Location
RS_2025_08	current	GRCh38.p14 (GCF_000001405.40)	8	NC_000008.11 (100702916..100722088, complement)
RS_2025_08	current	T2T-CHM13v2.0 (GCF_009914755.1)	8	NC_060932.1 (101828977..101848145, complement)
RS_2024_09	previous assembly	GRCh37.p13 (GCF_000001405.25)	8	NC_000008.10 (101715144..101734316, complement)

Chromosome 8 - NC_000008.11 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: Tissue-specific circular RNA induction during human fetal development
Description: 35 human fetal samples from 6 tissues (3 - 7 replicates per tissue) collected between 10 and 20 weeks gestational time were sequenced using Illumina TruSeq Stranded Total RNA
BioProject: PRJNA270632
Publication: PMID 26076956
Analysis date: Mon Apr 2 22:54:59 2018

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

LINC01197 inhibits influenza A virus replication by serving as a PABPC1 decoy.
Title: LINC01197 inhibits influenza A virus replication by serving as a PABPC1 decoy.
Concerted action of ataxin-2 and PABPC1-bound mRNA poly(A) tail in the formation of stress granules.
Title: Concerted action of ataxin-2 and PABPC1-bound mRNA poly(A) tail in the formation of stress granules.
LncRNA PRBC induces autophagy to promote breast cancer progression through modulating PABPC1-mediated mRNA stabilization.
Title: LncRNA PRBC induces autophagy to promote breast cancer progression through modulating PABPC1-mediated mRNA stabilization.
Exosomal long non-coding RNA TRPM2-AS promotes angiogenesis in gallbladder cancer through interacting with PABPC1 to activate NOTCH1 signaling pathway.
Title: Exosomal long non-coding RNA TRPM2-AS promotes angiogenesis in gallbladder cancer through interacting with PABPC1 to activate NOTCH1 signaling pathway.
BST2 promotes gastric cancer metastasis under the regulation of HOXD9 and PABPC1.
Title: BST2 promotes gastric cancer metastasis under the regulation of HOXD9 and PABPC1.
A complex with poly(A)-binding protein and EWS facilitates the transcriptional function of oncogenic ETS transcription factors in prostate cells.
Title: A complex with poly(A)-binding protein and EWS facilitates the transcriptional function of oncogenic ETS transcription factors in prostate cells.
PABPC1 promotes cell proliferation and metastasis in pancreatic adenocarcinoma by regulating COL12A1 expression.
Title: PABPC1 promotes cell proliferation and metastasis in pancreatic adenocarcinoma by regulating COL12A1 expression.
De novo variants in the PABP domain of PABPC1 lead to developmental delay.
Title: De novo variants in the PABP domain of PABPC1 lead to developmental delay.
Structural Model of the Human BTG2-PABPC1 Complex by Combining Mutagenesis, NMR Chemical Shift Perturbation Data and Molecular Docking.
Title: Structural Model of the Human BTG2-PABPC1 Complex by Combining Mutagenesis, NMR Chemical Shift Perturbation Data and Molecular Docking.
PABP1 Drives the Selective Translation of Influenza A Virus mRNA.
Title: PABP1 Drives the Selective Translation of Influenza A Virus mRNA.

Submit: New GeneRIF Correction See all GeneRIFs (90)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

HIV-1 interactions

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Protein interactions

Protein	Gene	Interaction	Pubs
Envelope surface glycoprotein gp120	env	Tandem affinity purification and mass spectrometry analysis identify cytoplasmic unit 1 of polyA binding protein (PABPC1), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells	PubMed
Gag-Pol	gag-pol	Tandem affinity purification and mass spectrometry analysis identify cytoplasmic unit 1 of polyA binding protein (PABPC1), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells	PubMed
Nef	nef	Tandem affinity purification and mass spectrometry analysis identify cytoplasmic unit 1 of polyA binding protein (PABPC1), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells	PubMed
Pr55(Gag)	gag	Tandem affinity purification and mass spectrometry analysis identify cytoplasmic unit 1 of polyA binding protein (PABPC1), HIV-1 Gag, Gag/Pol, gp120, and Nef incorporated into staufen1 RNP complexes isolated from HIV-1-expressing cells	PubMed
Rev	rev	HIV-1 Rev interacting protein, poly(A) binding protein 1 (PABPC1), is identified by the in-vitro binding experiments involving cytosolic or nuclear extracts from HeLa cells. The interaction of Rev with PABPC1 is increased by RRE	PubMed
	rev	binding of PAB1 to HIV-1 mRNA requires the presence of Rev and results in polyadenylation of the mRNA which is necessary for the Rev-dependent nucleocytoplasmic transport of HIV-1 mRNA	PubMed
Tat	tat	Poly(A) binding protein, cytoplasmic 1 (PABPC1) is identified to interact with HIV-1 Tat mutant Nullbasic in HeLa cells by LC MS/MS	PubMed
retropepsin	gag-pol	HIV-1 PR-induced PABP cleavage is involved in the inhibition of poly(A)-dependent translation. However, PABP cleavage has little impact on the translation of polyadenylated encephalomyocarditis virus internal ribosome entry site-containing mRNAs	PubMed
	gag-pol	Purified HIV-1 protease cleaves poly(A)-binding protein 1 (PABP1) directly at positions 237 and 477, separating the two first RNA-recognition motifs from the C-terminal domain of PABP	PubMed

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Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

GDB:568589 (e-PCR)
- UniSTS:157726

Pabpc1 (e-PCR), detects polymorphism
- UniSTS:265534

SHGC-30876 (e-PCR)
- UniSTS:64326

PABPC1 (e-PCR)
- UniSTS:279396

STS-R77214 (e-PCR)
- UniSTS:8071

D13S1095E (e-PCR)
- UniSTS:153224

RH68348 (e-PCR)
- UniSTS:79005

G49185 (e-PCR)
- UniSTS:108964

MARC_1283-1284:991931128:1 (e-PCR)
- UniSTS:230856

Pabpc1 (e-PCR), detects polymorphism
- UniSTS:479185

UniSTS:479186 (e-PCR)
- UniSTS:479186

Pabpc2 (e-PCR), detects polymorphism
- UniSTS:479186

Gene Ontology Provided by GOA

Function	Evidence Code	Pubs
enables RNA binding	HDA more info	PubMed
enables RNA binding	IDA Inferred from Direct Assay more info	PubMed
enables RNA binding	IEA Inferred from Electronic Annotation more info
enables RNA binding	IPI Inferred from Physical Interaction more info	PubMed
enables mRNA 3'-UTR binding	IBA Inferred from Biological aspect of Ancestor more info
enables mRNA 3'-UTR binding	IDA Inferred from Direct Assay more info	PubMed
enables mRNA binding	EXP Inferred from Experiment more info	PubMed
enables nucleic acid binding	IEA Inferred from Electronic Annotation more info
enables poly(A) binding	IBA Inferred from Biological aspect of Ancestor more info
enables poly(A) binding	IDA Inferred from Direct Assay more info	PubMed
enables poly(A) binding	IEA Inferred from Electronic Annotation more info
enables poly(A) binding	TAS Traceable Author Statement more info	PubMed
enables poly(U) RNA binding	IBA Inferred from Biological aspect of Ancestor more info
enables poly(U) RNA binding	IDA Inferred from Direct Assay more info	PubMed
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables translation activator activity	TAS Traceable Author Statement more info	PubMed

Process	Evidence Code	Pubs
involved_in CRD-mediated mRNA stabilization	IDA Inferred from Direct Assay more info	PubMed
involved_in RNA splicing	IEA Inferred from Electronic Annotation more info
involved_in mRNA processing	IEA Inferred from Electronic Annotation more info
involved_in mRNA splicing, via spliceosome	IC Inferred by Curator more info	PubMed
involved_in mRNA stabilization	TAS Traceable Author Statement more info	PubMed
involved_in negative regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay	IDA Inferred from Direct Assay more info	PubMed
involved_in negative regulation of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay	IDA Inferred from Direct Assay more info	PubMed
involved_in nuclear-transcribed mRNA catabolic process, nonsense-mediated decay	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of cytoplasmic translation	IDA Inferred from Direct Assay more info	PubMed
involved_in positive regulation of nuclear-transcribed mRNA catabolic process, deadenylation-dependent decay	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of nuclear-transcribed mRNA poly(A) tail shortening	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of viral genome replication	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in regulatory ncRNA-mediated gene silencing	ISS Inferred from Sequence or Structural Similarity more info

Component	Evidence Code	Pubs
part_of catalytic step 2 spliceosome	IDA Inferred from Direct Assay more info	PubMed
located_in cell leading edge	IDA Inferred from Direct Assay more info	PubMed
located_in cytoplasm	IDA Inferred from Direct Assay more info	PubMed
located_in cytoplasm	IEA Inferred from Electronic Annotation more info
located_in cytoplasm	TAS Traceable Author Statement more info	PubMed
located_in cytoplasmic ribonucleoprotein granule	IDA Inferred from Direct Assay more info	PubMed
is_active_in cytoplasmic stress granule	IBA Inferred from Biological aspect of Ancestor more info
located_in cytoplasmic stress granule	IDA Inferred from Direct Assay more info	PubMed
located_in cytoplasmic stress granule	IEA Inferred from Electronic Annotation more info
is_active_in cytosol	IBA Inferred from Biological aspect of Ancestor more info
located_in cytosol	IDA Inferred from Direct Assay more info	PubMed
located_in cytosol	TAS Traceable Author Statement more info
located_in extracellular exosome	HDA more info	PubMed
located_in focal adhesion	HDA more info	PubMed
located_in lamellipodium	IEA Inferred from Electronic Annotation more info
located_in membrane	HDA more info	PubMed
is_active_in nucleus	IBA Inferred from Biological aspect of Ancestor more info
located_in nucleus	IDA Inferred from Direct Assay more info	PubMed
located_in nucleus	IEA Inferred from Electronic Annotation more info
part_of ribonucleoprotein complex	IBA Inferred from Biological aspect of Ancestor more info
part_of ribonucleoprotein complex	IDA Inferred from Direct Assay more info	PubMed
part_of spliceosomal complex	IEA Inferred from Electronic Annotation more info

General protein information

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Preferred Names: polyadenylate-binding protein 1

Names: poly(A) binding protein, cytoplasmic 2

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.