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Symbol PABPC1 contributors: mct/ - updated : 08-12-2015
HGNC name poly(A) binding protein, cytoplasmic 1
HGNC id 8554
Location 8q22.3      Physical location : 101.715.143 - 101.734.315
Synonym name
  • poly(A)-binding protein, cytoplasmic 2
  • polyadenylate-binding protein 1
  • Synonym symbol(s) PABP1, PABPL1, PAB1, PABP, PABPC, PABPC2
    TYPE functioning gene
    STRUCTURE 19.17 kb     15 Exon(s)
    10 Kb 5' upstream gene genomic sequence study
    regulatory sequence Binding site
    text structure a cis-regulatory element composed of a cytidine residue at the cap site followed by an interrupted stretch ol pyrimidines (5' - TOP motif)
    MAPPING cloned Y linked N status confirmed
    Physical map
    LAPTM4B 8q22.1 lysosomal associated protein transmembrane 4 beta LOC389678 8 similar to hypothetical protein LOC51249 RPS23P1 8q23 ribosomal protein S23 pseudogene 1 MATN2 8q22 matrilin 2 RPL30 8q22-q24 ribosomal protein L30 FLJ39553 8q22.2 hypothetical protein FLJ39553 UK114 8q22 hypothetical protein FLJ39553 POP1 8q22.1 processing of precursors 1 FLJ13955 8q22.2 hypothetical protein FLJ13955 KCNS2 8q23.3-q24.11 potassium voltage-gated channel, delayed-rectifier, subfamily S, member 2 STK3 8q22.2 serine/threonine kinase 3 (STE20 homolog, yeast) MRP63P7 8q22.2 mitochondrial ribosomal protein 63 pseudogene 7 OSR2 8q22.2 odd-skipped-related 2A protein COH1 8q22.2 Cohen syndrome 1 COX6C 8q22-q23 cytochrome c oxidase subunit VIc DKFZP434I092 8q22.3 DKFZP434I092 protein LOC286151 8q22.3 similar to RIKEN cDNA 4930533G20 POLR2K 8q22 polymerase (RNA) II (DNA directed) polypeptide K, 7.0kDa SPAG1 8q22 sperm associated antigen 1 RNF19 8q22 ring finger protein 19 LOC157567 8q22.3 hypothetical protein LOC157567 MGC39715 8q22.3 hypothetical protein MGC39715 PABPC1 8q22.2-q23 poly(A) binding protein, cytoplasmic 1 LOC392256 YWHAZ 2p25.2-p25.1 tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, zeta polypeptide LOC51123 8q22.3 HSPC038 protein FKSG17 8q22.3 HSPC038 protein TFCP2L3 8q22.3 HSPC038 protein NCALD 8q22-q23 neurocalcin delta LOC392257 8 similar to IAP-associated factor VIAF1; phosducin-like 2 RRM2B 8q23.1 ribonucleotide reductase M2 B (TP53 inducible) DD5 8q22 ribonucleotide reductase M2 B (TP53 inducible) ODF1 8q22.3 outer dense fiber of sperm tails 1 TIEG 8q22.2 TGFB inducible early growth response OAZIN 8q22.3 ornithine decarboxylase antizyme inhibitor LOC389679 8 similar to hypothetical protein ATP6V1C1 8q22.3 ATPase, H+ transporting, lysosomal 42kDa, V1 subunit C, isoform 1 LOC389680 8 similar to MGC39526 protein BAALC 8q22.3 brain and acute leukemia, cytoplasmic FZD6 8q22.3-q23.1 frizzled homolog 6 (Drosophila) CTHRC1 8q22.3 collagen triple helix repeat containing 1 MFTC 8q22.3 mitochondrial folate transporter/carrier DKFZP564O0463 8q22.3 DKFZP564O0463 protein
    TRANSCRIPTS type messenger
    text 2848 bp with a splicing variant (38kDa)
    identificationnb exonstypebpproduct
    ProteinkDaAAspecific expressionYearPubmed
    15 - 2869 - 636 - 2007 17785442
    Type ubiquitous
       expressed in (based on citations)
    SystemOrgan level 1Organ level 2Organ level 3Organ level 4LevelPubmedSpeciesStageRna symbol
    Digestivestomach   highly
    Respiratoryrespiratory tractlarynx  highly
    Urinarybladder   highly
    cell lineage
    cell lines
    at STAGE
  • four RNA binding domains RRM1 to RRM4
  • a MLLE domain recruiting various regulatory proteins and translation factors to poly(A) mRNAs through binding of a conserved 12 AAs peptide motif called PAM2 (for PABP-interacting motif 2)
  • a C terminal proline-rich sequence (poly (A)-binding protein)
  • poly (A)-binding proteins family
  • CATEGORY RNA associated , receptor
    SUBCELLULAR LOCALIZATION     intracellular
    intracellular,nucleus,nucleoplasm,nuclear bodies,nuclear speckles
  • distributed in polyribosomes and in translationally inactive messenger ribonucleoprotein particles
  • basic FUNCTION
  • involved in the regulation of translation initiation, mRNA stability, regulation of poly(A) tail length
  • stimulating translation termination
  • may potentially function in translational repression during spermatogenesis
  • cytoplasmic PABPC1 plays a crucial role in regulating both translation and stability of eukaryotic mRNA
  • cytosolic poly(A) binding protein PABPC1 involved in mitochondrial translation inhibition
  • co-ordinative roles for DDX3X, EIF4E and PABPC1 in integrating environmental stress with translational regulation
  • association of the translation factors polyadenylate-binding protein-1 (PABPC1) and EIF4G1 is essential for high-level expression of polyadenylated mRNAs
  • CELLULAR PROCESS protein, translation/synthesis
    protein, translation regulation
    text initiation
    a component
  • component of the eukaryotic translation initiation complex eIF4F with eIF4A, eIF4E, eIF4EBPs, MNK1
    RNA binds mRNA poly(A) tails and affects mRNA stability and translation, in some situations interact with other RNA regions in addition to the poly(A) tail
    small molecule
  • SCA2 (potential ligand of PABC1), PAIP1
  • major cytoplasmic RNA-binding protein
  • interacting with TOB1
  • EIF4G1-PABPC1 interaction has been implicated in enhancing the formation of 48 S and 80 S initiation complexes and ribosome recycling through mRNA circularization
  • PAIP1 act as a translational activator in 5 prime cap-dependent translation by interacting with PABPC1 and the initiation factors EIF4A and EIF3A
  • in addition to PPP2CA, IGBP1 interacts with UBR5 and PABPC1, suggesting its involvement in multiple steps in the MTOR pathway that leads to translation initiation and cell-cycle progression
  • GSPT1 mediates translation termination-coupled mRNA decay via interaction with a cytosolic poly(A)-binding protein (PABPC1)
  • EIF4G1 interacts with the RRM2 domain of PABPC1
  • RNA-dependent interactions of RALY with MATR3, PABPC1 and ELAVL1
  • ATXN2 binds directly to RNAs in a PABPC1-independent manner
  • conserved function of the PUM1, PUM2 RBD is to bind specific mRNAs, antagonize PABPC1 function, and promote deadenylation
  • interaction of BTG2 with the first RRM domain of PABPC1 is required for BTG2 to control cell proliferation
  • YTHDF3 cooperates with two cofactors, PABPC1 and EIF4G2, to promote FOXO3 translation by binding to the translation initiation region of FOXO3 mRNA
  • cell & other
    Other translationally controlled through a cis-regulatory element
    methylated by arginine methyltransferase CARM1
    corresponding disease(s)
    Variant & Polymorphism
    Candidate gene
    Therapy target
  • Epab(-/-) female mice were infertile, and could not generate embryos or mature oocytes in vivo or in vitro