Protein
Regulator of nonsense transcripts UPF3
Organism
Arabidopsis thaliana
Function
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. Binds spliced mRNA upstream of exon-exon junctions (By similarity). Involved in nonsense-mediated decay (NMD) of mRNAs containing premature stop codons (premature termination codon PTC) by associating with the nuclear exon junction complex (EJC) and serving as link between the EJC core and NMD machinery. Eliminates the production of nonsense-containing RNAs (ncRNAs). Required for plant development and adaptation to environmental stresses, including plant defense and response to wounding.
Similarity
Belongs to the RENT3 family.
Sequence
MKEPLQKKKVVVRHLPPSLSQSDLLSQIDPRFADRYNWVSFRPGKSSYKNQKYSRAYVSFKAPEDVYEFAAFFNGHVFVNEKGAQFKAIVEYAPSQRVPKPSDKKDPREGSISKDPDYLEFLKVIAQPVENLPSAEIQLERREAEQSGASKAAPIVTPLMEFIRQKRATVMGPQGLSDIRRGGRRTRVVSANKPSPRPSKRNSEKKKYVEKESSKNVPRKTTADVSSSKPDYRQSNSSGKELPGNETAAIIDSSPPGIALTMDSGKKKILLLRSKDRDNPDNPPPQPEQHIDTNLSRNSTDSRQNQKSDVGGRLIKGILLRNDSRPSQSSTFVQSEQRVEPSEAENYKRPSRPANTRAGKDYHTSGTISEKQERRTRNKDRPDRVMWAPRRDGSEDQPLSSAGNNGEVKDRMFSQRSGEVVNSSGGHTLENGSARHSSRRVGGRNRKEEVVIGEGKTSRRGSGGGPSSHEKQMWIQKPSSGT