FEATURES

FAMILY

polyadenylate-binding protein type-1 family

DESCRIPTION

Also known as PABP1_HUMAN, PABPC1, PAB1, PABP, PABP1, PABPC2. Binds the poly(A) tail of mRNA, including that of its own transcript, and regulates processes of mRNA metabolism such as pre-mRNA splicing and mRNA stability (PubMed:11051545, PubMed:17212783, PubMed:25480299). Its function in translational initiation regulation can either be enhanced by PAIP1 or repressed by PAIP2 (PubMed:11051545, PubMed:20573744). Can probably bind to cytoplasmic RNA sequences other than poly(A) in vivo. Involved in translationally coupled mRNA turnover (PubMed:11051545). Implicated with other RNA-binding proteins in the cytoplasmic deadenylation/translational and decay interplay of the FOS mRNA mediated by the major coding-region determinant of instability (mCRD) domain (PubMed:11051545). Involved in regulation of nonsense-mediated decay (NMD) of mRNAs containing premature stop codons; for the recognition of premature termination codons (PTC) and initiation of NMD a competitive interaction between UPF1 and PABPC1 with the ribosome-bound release factors is proposed (PubMed:18447585). By binding to long poly(A) tails, may protect them from uridylation by ZCCHC6/ZCCHC11 and hence contribute to mRNA stability (PubMed:25480299)., (Microbial infection) Positively regulates the replication of dengue virus (DENV). Component of a multisubunit autoregulatory ribonucleoprotein complex (ARC), at least composed of IGF2BP1, PABPC1 and CSDE1 (PubMed:16356927). Directly interacts with IGF2BP1. Part of a complex associated with the FOS mCRD domain and consisting of HNRPD, SYNCRIP, PAIP1 and CSDE1/UNR (PubMed:11051545). Interacts with the PABPC1-interacting motif-1 (PAM1) and -2 (PAM2) of PAIP1 and PAIP2 (PubMed:9548260, PubMed:11172725, PubMed:11438674, PubMed:11997512, PubMed:11287632, PubMed:20096703, PubMed:33876849). Interacts with PAIP1 with a 1:1 stoichiometry and with PAIP2 with a 1:2 stoichiometry. The interaction with CSDE1 is direct and RNA-independent. Found in a mRNP complex with YBX2 (By similarity). Interacts with TENT2/GLD2 (By similarity). Identified in the spliceosome C complex (PubMed:11991638). Identified in a mRNP complex, at least composed of DHX9, DDX3X, ELAVL1, HNRNPU, IGF2BP1, ILF3, PABPC1, PCBP2, PTBP2, STAU1, STAU2, SYNCRIP and YBX1. The interaction with DDX3X is direct and RNA-independent (PubMed:18596238, PubMed:21883093, PubMed:22872150). This interaction increases in stressed cells and decreases during cell recovery (PubMed:21883093). Identified in a IGF2BP1-dependent mRNP granule complex containing untranslated mRNAs. Interacts with NXF1/TAP (PubMed:17267499, PubMed:18596238). Interacts with PIWIL1 (By similarity). Interacts with AGO1, AGO2, GSPT1 and GSPT2 (PubMed:17932509, PubMed:18447585, Ref.59). Interacts with LARP4B (Ref.61). Interacts (via the second and third RRM domains and the C-terminus) with PAIP2B (via central acidic portion and C-terminus) (PubMed:16804161, PubMed:11287632). Forms a complex with LARP1 and SHFL (PubMed:20430826, PubMed:24532714, PubMed:25940091, PubMed:26735137). Interacts with LARP4 (PubMed:21098120). Interacts with ZFC3H1 in a RNase-sensitive manner (PubMed:27871484). Interacts with TRIM71 (via NHL repeats) in an RNA-dependent manner (PubMed:23125361). Interacts with TENT5C; the interaction has no effect on TENT5C poly(A) polymerase function (PubMed:28931820). Interacts with G3BP1 and G3BP2 (PubMed:23279204). Interacts with ENDOV; the interaction is RNA-dependent and stimulates ENDOV activity (PubMed:27573237). May interact with SETX (PubMed:21700224). May form homodimers.

Also known as PABP1_HUMAN, PABPC1, PAB1, PABP, PABP1, PABPC2. Binds the poly(A) tail of mRNA, including that of its own transcript, and regulates processes of mRNA metabolism such as pre-mRNA s ...

EXTERNAL LINKS

PABPC1

Polyadenylate-binding protein 1

PABPC1

Molecular Synopsis