Telomerase-binding protein EST1A - Q86US8 (EST1A_HUMAN)


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Component of the telomerase ribonucleoprotein (RNP) complex that is essential for the replication of chromosome termini (PubMed:19179534). May have a general role in telomere regulation (PubMed:12676087, PubMed:12699629). Promotes in vitro the ability of TERT to elongate telomeres (PubMed:12676087, PubMed:12699629). Overexpression induces telomere uncapping, chromosomal end-to-end fusions (telomeric DNA persists at the fusion points) and did not perturb TRF2 telomeric localization (PubMed:12676087, PubMed:12699629). Binds to the single-stranded 5'-(GTGTGG)(4)GTGT-3' telomeric DNA, but not to a telomerase RNA template component (TER) (PubMed:12676087, PubMed:12699629). UniProt
Pathway Maps
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Subunit Structure
May form homooligomers (PubMed:20930030). Associated component of the telomerase holoenzyme complex (PubMed:19179534). Interacts with TERT, independently of the telomerase RNA (PubMed:12676087, PubMed:12699629). Interacts with SMG1, SMG5, SMG7, UPF1, UPF2, UPF3B and the PP2A catalytic subunits (PubMed:12554878, PubMed:19060897, PubMed:20930030). Also interacts with the exon junction complex (EJC) composed at least of CASC3, EIF4A3, MAGOH and RBM8A; required for the process of nonsense-mediated mRNA decay (PubMed:20930030). UniProt
The PINc domain confers endonuclease activity and is expected to bind the catalytic metal ion. UniProt
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