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Kadri Õunap, Lilian Leetsi, Maarja Matsoo, Reet Kurg
The human WBSCR22 protein is a 18S rRNA methyltransferase involved in pre-rRNA processing and ribosome 40S subunit biogenesis. Recent studies have shown that the protein function in ribosome synthesis is independent of its enzymatic activity. In this work, we have studied the WBSCR22 protein interaction partners by SILAC-coupled co-immunoprecipitation assay and identified TRMT112 as the interaction partner of WBSCR22. Knock-down of TRMT112 expression decreased the WBSCR22 protein level in mammalian cells, suggesting that the stability of WBSCR22 is regulated through the interaction with TRMT112...
2015: PloS One
Christiane Zorbas, Emilien Nicolas, Ludivine Wacheul, Emmeline Huvelle, Valérie Heurgué-Hamard, Denis L J Lafontaine
At the heart of the ribosome lie rRNAs, whose catalytic function in translation is subtly modulated by posttranscriptional modifications. In the small ribosomal subunit of budding yeast, on the 18S rRNA, two adjacent adenosines (A1781/A1782) are N(6)-dimethylated by Dim1 near the decoding site, and one guanosine (G1575) is N(7)-methylated by Bud23-Trm112 at a ridge between the P- and E-site tRNAs. Here we establish human DIMT1L and WBSCR22-TRMT112 as the functional homologues of yeast Dim1 and Bud23-Trm112...
June 1, 2015: Molecular Biology of the Cell
Tiantian Gu, Hongjuan He, Yan Zhang, Zhengbin Han, Guangyuan Hou, Tiebo Zeng, Qi Liu, Qiong Wu
Mouse Trmt112, the homologous gene of yeast Trm112 (tRNA methyltransferase 11-2), was initially cloned from RIKEN with uncertain function. The yeast TRM112 is now known to play important roles in RNA methylation. Here, we studied the expression of Trmt112 by in situ hybridization and quantitative real-time RT-PCR (QRT-PCR). A higher expression level of Trmt112 was observed in the brain and nervous system by whole mount in situ hybridization from embryonic day 10.5 (E10.5) to E11.5. At later developmental stages E13...
April 26, 2012: Acta Histochemica et Cytochemica
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