UPF1

Template:Short description An Error has occurred retrieving Wikidata item for infobox Regulator of nonsense transcripts 1 (or Up-frameshift suppressor 1 homolog) is a protein that in humans is encoded by the UPF1 gene.

Function

This gene encodes a protein that is part of a post-splicing multiprotein complex, the exon junction complex, involved in both mRNA nuclear export and mRNA surveillance. 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 is located in both the cytoplasm and nucleus. When translation ends, it interacts with the functional homolog of yeast Upf2p to trigger mRNA decapping. Use of multiple polyadenylation sites has been noted for this gene.

Interactions

UPF1 interacts with:

• DCP1A,
• DCP2,
• SMG1,
• UPF2,
• UPF3A, and
• UPF3B.

Further reading

• Azzalin CM, Lingner J (2006). "The double life of UPF1 in RNA and DNA stability pathways". Cell Cycle. 5 (14): 1496–8. doi:10.4161/cc.5.14.3093. PMID 16861888.
• Horikoshi M, Sekimizu K, Natori S (1984). "Analysis of the stimulatory factor of RNA polymerase II in the initiation and elongation complex". J. Biol. Chem. 259 (1): 608–11. doi:10.1016/S0021-9258(17)43705-7. PMID 6200476.
• Nagase T, Seki N, Ishikawa K, et al. (1997). "Prediction of the coding sequences of unidentified human genes. VI. The coding sequences of 80 new genes (KIAA0201-KIAA0280) deduced by analysis of cDNA clones from cell line KG-1 and brain". DNA Res. 3 (5): 321–9, 341–54. doi:10.1093/dnares/3.5.321. PMID 9039502.
• Czaplinski K, Ruiz-Echevarria MJ, Paushkin SV, et al. (1998). "The surveillance complex interacts with the translation release factors to enhance termination and degrade aberrant mRNAs". Genes Dev. 12 (11): 1665–77. doi:10.1101/gad.12.11.1665. PMC 316864. PMID 9620853.
• Page MF, Carr B, Anders KR, et al. (1999). "SMG-2 Is a Phosphorylated Protein Required for mRNA Surveillance in Caenorhabditis elegans and Related to Upf1p of Yeast". Mol. Cell. Biol. 19 (9): 5943–51. doi:10.1128/MCB.19.9.5943. PMC 84455. PMID 10454541.
• Bhattacharya A, Czaplinski K, Trifillis P, et al. (2000). "Characterization of the biochemical properties of the human Upf1 gene product that is involved in nonsense-mediated mRNA decay". RNA. 6 (9) S1355838200000546: 1226–35. doi:10.1017/S1355838200000546. PMC 1369996. PMID 10999600.
• Mendell JT, Medghalchi SM, Lake RG, et al. (2000). "Novel Upf2p Orthologues Suggest a Functional Link between Translation Initiation and Nonsense Surveillance Complexes". Mol. Cell. Biol. 20 (23): 8944–57. doi:10.1128/MCB.20.23.8944-8957.2000. PMC 86549. PMID 11073994.
• Serin G, Gersappe A, Black JD, et al. (2001). "Identification and Characterization of Human Orthologues to Saccharomyces cerevisiae Upf2 Protein and Upf3 Protein (Caenorhabditis elegans SMG-4)". Mol. Cell. Biol. 21 (1): 209–23. doi:10.1128/MCB.21.1.209-223.2001. PMC 88795. PMID 11113196.
• Lykke-Andersen J, Shu MD, Steitz JA (2001). "Human Upf proteins target an mRNA for nonsense-mediated decay when bound downstream of a termination codon". Cell. 103 (7): 1121–31. doi:10.1016/S0092-8674(00)00214-2. PMID 11163187. S2CID 18417600.
• Denning G, Jamieson L, Maquat LE, et al. (2001). "Cloning of a novel phosphatidylinositol kinase-related kinase: characterization of the human SMG-1 RNA surveillance protein". J. Biol. Chem. 276 (25): 22709–14. doi:10.1074/jbc.C100144200. PMID 11331269.
• Yamashita A, Ohnishi T, Kashima I, et al. (2001). "Human SMG-1, a novel phosphatidylinositol 3-kinase-related protein kinase, associates with components of the mRNA surveillance complex and is involved in the regulation of nonsense-mediated mRNA decay". Genes Dev. 15 (17): 2215–28. doi:10.1101/gad.913001. PMC 312771. PMID 11544179.
• Lykke-Andersen J, Shu MD, Steitz JA (2001). "Communication of the position of exon-exon junctions to the mRNA surveillance machinery by the protein RNPS1". Science. 293 (5536): 1836–9. Bibcode:2001Sci...293.1836L. doi:10.1126/science.1062786. PMID 11546874. S2CID 389385.
• Carastro LM, Tan CK, Selg M, et al. (2002). "Identification of delta helicase as the bovine homolog of HUPF1: demonstration of an interaction with the third subunit of DNA polymerase delta". Nucleic Acids Res. 30 (10): 2232–43. doi:10.1093/nar/30.10.2232. PMC 115286. PMID 12000843.
• Mendell JT, ap Rhys CM, Dietz HC (2002). "Separable roles for rent1/hUpf1 in altered splicing and decay of nonsense transcripts". Science. 298 (5592): 419–22. doi:10.1126/science.1074428. PMID 12228722. S2CID 46447414.
• Lykke-Andersen J (2003). "Identification of a Human Decapping Complex Associated with hUpf Proteins in Nonsense-Mediated Decay". Mol. Cell. Biol. 22 (23): 8114–21. doi:10.1128/MCB.22.23.8114-8121.2002. PMC 134073. PMID 12417715.
• Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. Bibcode:2002PNAS...9916899M. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
• Chiu SY, Serin G, Ohara O, Maquat LE (2003). "Characterization of human Smg5/7a: A protein with similarities to Caenorhabditis elegans SMG5 and SMG7 that functions in the dephosphorylation of Upf1". RNA. 9 (1): 77–87. doi:10.1261/rna.2137903. PMC 1370372. PMID 12554878.
• Schell T, Köcher T, Wilm M, et al. (2003). "Complexes between the nonsense-mediated mRNA decay pathway factor human upf1 (up-frameshift protein 1) and essential nonsense-mediated mRNA decay factors in HeLa cells". Biochem. J. 373 (Pt 3): 775–83. doi:10.1042/BJ20021920. PMC 1223536. PMID 12723973.