Rabbit anti-Human UPF3A Polyclonal Antibody

Uniprot Id

Q9H1J1

Target Species

Human

Target Name

UPF3A

Target Full Name

Regulator of nonsense transcripts 3A

Target Function

Involved in nonsense-mediated decay (NMD) of mRNAs containing premature stop codons by associating with the nuclear exon junction complex (EJC) and serving as link between the EJC core and NMD machinery. Recruits UPF2 at the cytoplasmic side of the nuclear envelope and the subsequent formation of an UPF1-UPF2-UPF3 surveillance complex (including UPF1 bound to release factors at the stalled ribosome) is believed to activate NMD. However, UPF3A is shown to be only marginally active in NMD as compared to UPF3B. Binds spliced mRNA upstream of exon-exon junctions. In vitro, weakly stimulates translation.

Target Subcellular Location

Nucleus. Cytoplasm. Note=Shuttling between the nucleus and the cytoplasm.

Target Protein Families

RENT3 family

Target Tissue Specificity

Isoform 1 is strongly expressed in testis, uterus, muscle, fetal brain and spinal cord. Isoform 2 is strongly expressed in fetal brain and spinal cord.

Target Synonyms

2600001C03Rik; 4930546M19Rik; hUpf3; HUPF3A; MGC151365; Nonsense mRNA reducing factor 3A; OTTHUMP00000018789; Regulator of nonsense transcripts 3A; REN3A_HUMAN; RENT3A; Up frameshift suppressor 3 homolog A; Up-frameshift suppressor 3 homolog A; UPF3 A; UPF3; UPF3 regulator of nonsense transcripts homolog A; upf3a

Target Background

This gene encodes a protein that is part of a post-splicing multiprotein complex involved in both mRNA nuclear export and mRNA surveillance. The encoded protein is one of two functional homologs to yeast Upf3p. mRNA surveillance detects exported mRNAs with truncated open reading frames and initiates nonsense-mediated mRNA decay (NMD). When translation ends upstream from the last exon-exon junction, this triggers NMD to degrade mRNAs containing premature stop codons. This protein binds to the mRNA and remains bound after nuclear export, acting as a nucleocytoplasmic shuttling protein. It forms with Y14 a complex that binds specifically 20 nt upstream of exon-exon junctions. This gene is located on the long arm of chromosome 13. Several splice variants encoding different isoforms have been found for this gene.