| 2012 |
Trm112 is required for Bud23 stability in vivo; deletion of Trm112 phenocopies bud23Δ and results in defective 40S small ribosomal subunit biogenesis. Genetic analysis further reveals a 60S biogenesis defect in trm112Δ dependent on Nop2 and Rcm1 (additional Trm112 interactors), extending Trm112 function to both ribosomal subunits. |
Sucrose gradient sedimentation, co-immunoprecipitation, genetic epistasis (double mutant analysis), yeast deletion strains |
Molecular biology of the cell |
High |
22956767
|
| 2012 |
Trm112 interacts directly with Bud23 in vitro, is required for Bud23 stability in vivo, and is necessary for Bud23-mediated N7-methylguanosine (m7G) modification at position G1575 of 18S rRNA. Loss of Trm112 leads to Bud23 failing to bind nascent preribosomes, activating a nucleolar surveillance pathway via TRAMP complexes and causing pre-ribosome degradation. |
In vitro binding assay, yeast genetics (deletion strains), rRNA methylation assay, co-purification with pre-rRNAs |
Molecular and cellular biology |
High |
22493060
|
| 2011 |
Trm112 activates the Mtq2 catalytic subunit (eRF1 glutamine methyltransferase) through a common structural mechanism. Crystal structure of Mtq2-Trm112 complex with active site mapping showed that the same Trm112 surface activates Trm9 and Trm11 tRNA methyltransferases, indicating Trm112 uses a conserved strategy to activate multiple methyltransferases modifying components of the translation machinery. |
X-ray crystallography, site-directed mutagenesis, in vivo functional experiments |
Nucleic acids research |
High |
21478168
|
| 2014 |
Crystal structures of Bud23-Trm112 (apo and SAM-bound forms) revealed that Bud23 and Trm112 interact through a β-zipper involving main-chain atoms, burying a hydrophobic surface. Trm112 undergoes induced-fit structural rearrangement upon binding Bud23. The structures further show Bud23-Trm112 binds pre-ribosomes at an early nucleolar stage but m7G methylation of G1575 occurs at a late step of 40S biogenesis, implying delayed catalytic activation. Bud23-Trm112 also directly interacts with the DEAH RNA helicase Dhr1. |
X-ray crystallography (apo and SAM-bound), mutagenesis, co-immunoprecipitation with pre-ribosomes and Dhr1 |
Proceedings of the National Academy of Sciences of the United States of America |
High |
25489090
|
| 2015 |
Human WBSCR22-TRMT112 is the functional homologue of yeast Bud23-Trm112, required for distinct pre-rRNA processing reactions leading to 18S rRNA synthesis. Ribosome biogenesis requires the presence of the modification enzyme rather than its RNA-modifying catalytic activity, indicating a conserved quality control mechanism where methyltransferase binding to nascent pre-rRNA is a prerequisite to processing. |
RNAi knockdown, pre-rRNA processing analysis, catalytic mutant complementation assays in human cells |
Molecular biology of the cell |
High |
25851604
|
| 2015 |
TRMT112 is identified as an interaction partner of WBSCR22 by SILAC-coupled co-immunoprecipitation. Knockdown of TRMT112 decreases WBSCR22 protein levels, indicating TRMT112 stabilizes WBSCR22. The WBSCR22-TRMT112 complex localizes to the cell nucleus, and TRMT112 subcellular localization is determined by WBSCR22. WBSCR22 is ubiquitinated and degraded via the proteasome pathway when transiently expressed without its stabilizing partner. |
SILAC co-immunoprecipitation, siRNA knockdown, immunofluorescence localization, ubiquitination assay, proteasome inhibition |
PloS one |
High |
26214185
|
| 2015 |
Crystal structure of the Trm9-Trm112 complex reveals the structural basis for Trm112's role as an obligate activating platform for tRNA mcm5U modification. Trm112 interacts with Trm9 through a similar mode as other Trm112-MTase complexes despite <20% sequence identity among partners, demonstrating structural plasticity in the Trm112 interaction surface. |
X-ray crystallography, structure-function analysis, sequence and structural comparison |
Nucleic acids research |
High |
26438534
|
| 2017 |
Trm112 activates Trm11 enzymatic activity by influencing S-adenosyl-L-methionine (SAM) binding and contributing to tRNA binding. Hydrogen-deuterium exchange mass spectrometry showed the Trm11-Trm112 interaction relies on the same molecular bases as other Trm112-methyltransferase complexes, and all Trm112-dependent methyltransferases compete to interact with this partner. |
Enzymatic activity assays, hydrogen-deuterium exchange mass spectrometry (HDX-MS), binding assays |
Nucleic acids research |
High |
27986851
|
| 2019 |
METTL5 forms a heterodimeric complex with TRMT112 to gain metabolic stability in cells; METTL5 is identified as the enzyme responsible for the N6-methyladenosine (m6A) modification of 18S rRNA. The first atomic resolution crystal structure of METTL5-TRMT112 was determined, revealing an RNA-binding mode distinct from other m6A RNA methyltransferases, with structural similarities to a DNA methyltransferase suggesting base extrusion as the modification mechanism. |
X-ray crystallography, in vitro methylation assay, co-immunoprecipitation, metabolic stability assays in cells |
Nucleic acids research |
High |
31328227
|
| 2019 |
Crystal structure of human N6AMT1 (HEMK2)-TRMT112 in complex with SAM shows that TRMT112 binds a hydrophobic surface of N6AMT1 to stabilize its structure but does not directly contribute to substrate binding or catalysis. Biochemical data confirm the complex cannot bind DNA and has no methyltransferase activity for DNA, but exhibits methyltransferase activity for Gln185 of eRF1, establishing N6AMT1 as a protein glutamine methyltransferase rather than a DNA methyltransferase. |
X-ray crystallography, DNA binding assay, in vitro methyltransferase activity assay |
Cell discovery |
High |
31636962
|
| 2018 |
In archaea (Haloferax volcanii), Trm112 interacts with and activates multiple methyltransferases targeting translation machinery components, including enzymes functionally orthologous to eukaryotic Trm112 partners and some with bacterial methyltransferase similarities, demonstrating that Trm112 functions as a general methyltransferase activator conserved across all three domains of life. |
Functional and structural characterization, co-immunoprecipitation, mass spectrometry interactome |
Nucleic acids research |
Medium |
30010922
|
| 2021 |
THUMPD3 interacts with TRMT112 to form the m2G6 tRNA methyltransferase complex responsible for N2-methylguanosine at position 6 of human cytoplasmic tRNAs. In vitro, THUMPD3 alone cannot modify tRNAs, but THUMPD3-TRMT112 methylates all 26 tested G6-containing human cytoplasmic tRNAs, recognizing the 3'-CCA terminus of mature tRNAs. Knockout of THUMPD3-TRMT112 impairs global protein synthesis and reduces cell growth. |
Reverse genetics, RNA mass spectrometry, in vitro methylation assay, THUMPD3 knockout cell line |
Nucleic acids research |
High |
34669960
|
| 2021 |
Seven methyltransferases (N6AMT1, WBSCR22, METTL5, ALKBH8, THUMPD2, THUMPD3, TRMT11) are identified as TRMT112 interaction partners by SILAC screen. TRMT112 stabilizes all seven MTases in cells, and TRMT112 with its MTase partners exhibit a strong mutual feedback loop upon co-expression. Single amino acid mutations on TRMT112 surface reveal partner-specific interaction differences. |
SILAC co-immunoprecipitation screen, co-expression stability assays, site-directed mutagenesis |
International journal of molecular sciences |
High |
34948388
|
| 2020 |
Two crystal structures of HEMK2 (N6AMT1)-TRMT112 (SAM-bound and SAH/methylglutamine-bound post-catalytic complex) reveal a specific pocket in HEMK2 for glutamine substrate accommodation and catalysis of eRF1 Gln185 methylation. Mass spectrometry confirmed in vitro methylation of eRF1 glutamine. |
X-ray crystallography (two structures), mass spectrometry-based methylation assay |
The Biochemical journal |
High |
32969463
|
| 2022 |
The METTL5-TRMT112 complex installs m6A at position 1832 of human 18S rRNA, and TRMT112 is required for METTL5 stability. Human METTL5 mutations associated with microcephaly and intellectual disability disrupt the METTL5-TRMT112 interaction. Loss of METTL5 regulates gene expression at the translational level in human cancer cell lines and mice. |
Knockdown/knockout in human cells and mice, rRNA methylation mapping, co-immunoprecipitation, polysome profiling, in vivo mouse model |
The Journal of biological chemistry |
High |
35033535
|
| 2019 |
TRMT112 regulates the expression of N6AMT1 isoforms by selectively stabilizing isoform 1; the alternatively spliced N6AMT1 isoform (lacking substrate-binding motif) cannot interact with TRMT112 and is rapidly degraded. Knockdown of TRMT112 does not affect N6AMT1 protein levels, indicating that WBSCR22 and N6AMT1 are differently regulated by their common cofactor. |
Co-immunoprecipitation, siRNA knockdown, protein stability assay, isoform expression analysis |
Biomolecules |
Medium |
31466382
|
| 2021 |
BUD23-TRMT112 binds the RNA-dependent RNA polymerase domain of Borna disease virus L protein and mediates chromosomal tethering of viral ribonucleoproteins (vRNPs). The methyltransferase activity of BUD23-TRMT112 is necessary for the chromosomal tethering process. |
Proximity-dependent biotinylation (BioID), co-immunoprecipitation, loss-of-function assays with MTase-dead mutants |
Microbiology and immunology |
Medium |
34324219
|
| 2020 |
Archaeal AfTrm11 from Archaeoglobus fulgidus directly interacts with AfTrm112, and while AfTrm11 is active as a single protein, its enzymatic activity is strongly enhanced by AfTrm112. Crystal structures of the AfTrm11-Trm112 complex and AfTrm11 alone reveal conservation of the interaction mechanism with eukaryotic enzymes. |
X-ray crystallography (AfTrm11-Trm112 complex, AfTrm11 alone, sinefungin-bound), in vitro methyltransferase activity assay, binding assay |
Nucleic acids research |
Medium |
33035335
|
| 2026 |
Chemical probes (bicyclopyrrolidine acrylamide stereoprobes) react covalently with C100 of TRMT112 exclusively within the METTL5-TRMT112 complex but not with uncomplexed TRMT112 or other TRMT112:MT complexes. A co-crystal structure reveals stereoprobe binding to a composite pocket at the TRMT112-METTL5 interface templated by METTL5. Stereoprobe binding induces structural rearrangements that allosterically agonize METTL5 activity, demonstrating that covalent ligands can confer partner-specific functional effects on a pleiotropic adaptor. |
Chemical proteomics, co-crystal structure, allosteric activity assay, recombinant protein binding assay |
Nature chemical biology |
High |
41507545
|
| 2022 |
WBSCR22 and TRMT112 function synergistically in pancreatic cancer; concurrent overexpression of both WBSCR22 and TRMT112 further suppresses tumor proliferation, migration, invasion, and tumorigenesis compared to either alone, and WBSCR22-OE negatively regulates ISG15 transcription as a downstream effector. |
Overexpression in cancer cell lines, in vivo tumor model, RNA-sequencing, functional rescue assays |
International journal of oncology |
Medium |
35088887
|
| 2027 |
The THUMPD3-TRMT112 m2G tRNA methyltransferase complex promotes pancreatic cancer cell growth and autophagy by supporting TFEB translation via m2G modification of tRNALeu(CAG). Knockdown of THUMPD3 or TRMT112 suppressed autophagic flux and reduced TFEB translation, revealing a tRNA modification-dependent translational control mechanism. |
siRNA knockdown, in vitro and in vivo tumor growth assays, polysome/translation analysis, tRNA modification mapping |
Molecular cancer |
Medium |
41530782
|
| 2024 |
In Drosophila, Mettl5 forms a complex with Trmt112 to influence 18S rRNA methylation and translational regulation; a Trmt112 mutation recapitulates the sleep disturbances seen in Mettl5 mutants, implicating the Mettl5/Trmt112 complex in translational control of PERIOD protein levels via effects on proteasome component expression. |
Genetic rescue experiments, RNA-seq, Ribo-seq, Drosophila mutant analysis |
bioRxivpreprint |
Medium |
40475643
|