5fg0

Structural highlights

Function

LTN1_YEAST E3 ubiquitin-protein ligase component of the ribosome quality control complex (RQC), a ribosome-associated complex that mediates ubiquitination and extraction of incompletely synthesized nascent chains for proteasomal degradation (PubMed:23178123). Mediates ubiquitination of proteins derived from mRNAs lacking stop codons (non-stop proteins) and other translation arrest products induced by poly-lysine sequences and tandem rare codons. Ubiquitination leads to CDC48 recruitment for extraction and degradation of the incomplete translation product (PubMed:20835226, PubMed:23825054, PubMed:24261871). May indirectly play a role in chromatin function and transcription (PubMed:17283062).^{[1] [2] [3] [4] [5]}

See Also

• Ubiquitin protein ligase 3D structures

References

1. ↑ Braun MA, Costa PJ, Crisucci EM, Arndt KM. Identification of Rkr1, a nuclear RING domain protein with functional connections to chromatin modification in Saccharomyces cerevisiae. Mol Cell Biol. 2007 Apr;27(8):2800-11. Epub 2007 Feb 5. PMID:17283062 doi:http://dx.doi.org/10.1128/MCB.01947-06
2. ↑ Bengtson MH, Joazeiro CA. Role of a ribosome-associated E3 ubiquitin ligase in protein quality control. Nature. 2010 Sep 23;467(7314):470-3. doi: 10.1038/nature09371. Epub 2010 Sep 12. PMID:20835226 doi:http://dx.doi.org/10.1038/nature09371
3. ↑ Brandman O, Stewart-Ornstein J, Wong D, Larson A, Williams CC, Li GW, Zhou S, King D, Shen PS, Weibezahn J, Dunn JG, Rouskin S, Inada T, Frost A, Weissman JS. A ribosome-bound quality control complex triggers degradation of nascent peptides and signals translation stress. Cell. 2012 Nov 21;151(5):1042-54. doi: 10.1016/j.cell.2012.10.044. PMID:23178123 doi:http://dx.doi.org/10.1016/j.cell.2012.10.044
4. ↑ Letzring DP, Wolf AS, Brule CE, Grayhack EJ. Translation of CGA codon repeats in yeast involves quality control components and ribosomal protein L1. RNA. 2013 Sep;19(9):1208-17. doi: 10.1261/rna.039446.113. Epub 2013 Jul 3. PMID:23825054 doi:http://dx.doi.org/10.1261/rna.039446.113
5. ↑ Matsuda R, Ikeuchi K, Nomura S, Inada T. Protein quality control systems associated with no-go and nonstop mRNA surveillance in yeast. Genes Cells. 2014 Jan;19(1):1-12. doi: 10.1111/gtc.12106. Epub 2013 Nov 21. PMID:24261871 doi:http://dx.doi.org/10.1111/gtc.12106