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- PDB-8eg0: CryoEM structure of human METTL1-WDR4 in complex with Lys-tRNA and SAH -

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Basic information

Entry
Database: PDB / ID: 8eg0
TitleCryoEM structure of human METTL1-WDR4 in complex with Lys-tRNA and SAH
Components
  • RNA (65-MER)
  • tRNA (guanine-N(7)-)-methyltransferase
  • tRNA (guanine-N(7)-)-methyltransferase non-catalytic subunit WDR4
KeywordsTRANSFERASE/RNA / Cancer protein / Methyl transferase / TRANSFERASE / TRANSFERASE-RNA complex
Function / homology
Function and homology information


internal mRNA (guanine-N7-)-methyltransferase activity / tRNA (m7G46) methyltransferase complex / tRNA (guanine-N7)-methylation / tRNA stabilization / RNA (guanine-N7)-methylation / tRNA (guanine46-N7)-methyltransferase / tRNA (guanine(46)-N7)-methyltransferase activity / tRNA methyltransferase activator activity / tRNA methyltransferase complex / tRNA modification in the nucleus and cytosol ...internal mRNA (guanine-N7-)-methyltransferase activity / tRNA (m7G46) methyltransferase complex / tRNA (guanine-N7)-methylation / tRNA stabilization / RNA (guanine-N7)-methylation / tRNA (guanine46-N7)-methyltransferase / tRNA (guanine(46)-N7)-methyltransferase activity / tRNA methyltransferase activator activity / tRNA methyltransferase complex / tRNA modification in the nucleus and cytosol / tRNA modification / tRNA methylation / cellular response to stress / Transferases; Transferring one-carbon groups; Methyltransferases / enzyme activator activity / chromosome / tRNA binding / DNA damage response / nucleolus / nucleoplasm / nucleus / cytosol
Similarity search - Function
tRNA (guanine-N(7)-)-methyltransferase non-catalytic subunit / tRNA (guanine-N-7) methyltransferase catalytic subunit Trm8, eukaryote / SAM-dependent methyltransferase TRMB-type domain profile. / tRNA (guanine-N-7) methyltransferase, Trmb type / Putative methyltransferase / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / WD domain, G-beta repeat / Trp-Asp (WD) repeats profile. ...tRNA (guanine-N(7)-)-methyltransferase non-catalytic subunit / tRNA (guanine-N-7) methyltransferase catalytic subunit Trm8, eukaryote / SAM-dependent methyltransferase TRMB-type domain profile. / tRNA (guanine-N-7) methyltransferase, Trmb type / Putative methyltransferase / YVTN repeat-like/Quinoprotein amine dehydrogenase / 7 Propeller / Methylamine Dehydrogenase; Chain H / WD domain, G-beta repeat / Trp-Asp (WD) repeats profile. / Trp-Asp (WD) repeats circular profile. / WD40 repeats / WD40 repeat / WD40-repeat-containing domain superfamily / WD40/YVTN repeat-like-containing domain superfamily / S-adenosyl-L-methionine-dependent methyltransferase superfamily / Mainly Beta
Similarity search - Domain/homology
S-ADENOSYL-L-HOMOCYSTEINE / : / RNA / RNA (> 10) / tRNA (guanine-N(7)-)-methyltransferase non-catalytic subunit WDR4 / tRNA (guanine-N(7)-)-methyltransferase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.53 Å
AuthorsRuiz-Arroyo, V.M. / Nam, Y.
Funding support United States, 3items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01 GM122960 United States
Cancer Prevention and Research Institute of Texas (CPRIT)RP190259 United States
Welch FoundationI-2115-20220331 United States
Citation
Journal: Nature / Year: 2023
Title: Structures and mechanisms of tRNA methylation by METTL1-WDR4.
Authors: Victor M Ruiz-Arroyo / Rishi Raj / Kesavan Babu / Otgonbileg Onolbaatar / Paul H Roberts / Yunsun Nam /
Abstract: Specific, regulated modification of RNAs is important for proper gene expression. tRNAs are rich with various chemical modifications that affect their stability and function. 7-Methylguanosine (mG) ...Specific, regulated modification of RNAs is important for proper gene expression. tRNAs are rich with various chemical modifications that affect their stability and function. 7-Methylguanosine (mG) at tRNA position 46 is a conserved modification that modulates steady-state tRNA levels to affect cell growth. The METTL1-WDR4 complex generates mG46 in humans, and dysregulation of METTL1-WDR4 has been linked to brain malformation and multiple cancers. Here we show how METTL1 and WDR4 cooperate to recognize RNA substrates and catalyse methylation. A crystal structure of METTL1-WDR4 and cryo-electron microscopy structures of METTL1-WDR4-tRNA show that the composite protein surface recognizes the tRNA elbow through shape complementarity. The cryo-electron microscopy structures of METTL1-WDR4-tRNA with S-adenosylmethionine or S-adenosylhomocysteine along with METTL1 crystal structures provide additional insights into the catalytic mechanism by revealing the active site in multiple states. The METTL1 N terminus couples cofactor binding with conformational changes in the tRNA, the catalytic loop and the WDR4 C terminus, acting as the switch to activate mG methylation. Thus, our structural models explain how post-translational modifications of the METTL1 N terminus can regulate methylation. Together, our work elucidates the core and regulatory mechanisms underlying mG modification by METTL1, providing the framework to understand its contribution to biology and disease.
#1: Journal: To be published
Title: CryoEM structure of human METTL1-WDR4 in complex with Lys-tRNA
Authors: Ruiz-Arroyo, V.M. / Nam, Y.
History
DepositionSep 10, 2022Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 11, 2023Provider: repository / Type: Initial release
Revision 1.1Jan 25, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.2Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
B: tRNA (guanine-N(7)-)-methyltransferase non-catalytic subunit WDR4
A: tRNA (guanine-N(7)-)-methyltransferase
C: RNA (65-MER)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)100,1864
Polymers99,8023
Non-polymers3841
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy, 3D Reconstruction
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein tRNA (guanine-N(7)-)-methyltransferase non-catalytic subunit WDR4 / Protein Wuho homolog / hWH / WD repeat-containing protein 4


Mass: 45123.023 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: WDR4 / Production host: Escherichia coli (E. coli) / References: UniProt: P57081
#2: Protein tRNA (guanine-N(7)-)-methyltransferase / Methyltransferase-like protein 1 / mRNA (guanine-N(7)-)-methyltransferase / miRNA (guanine-N(7)-)- ...Methyltransferase-like protein 1 / mRNA (guanine-N(7)-)-methyltransferase / miRNA (guanine-N(7)-)-methyltransferase / tRNA (guanine(46)-N(7))-methyltransferase / tRNA(m7G46)-methyltransferase


Mass: 31516.012 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: METTL1, C12orf1 / Production host: Escherichia coli (E. coli)
References: UniProt: Q9UBP6, tRNA (guanine46-N7)-methyltransferase, Transferases; Transferring one-carbon groups; Methyltransferases
#3: RNA chain RNA (65-MER)


Mass: 23162.705 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) Homo sapiens (human) / References: GenBank: 1781322811
#4: Chemical ChemComp-SAH / S-ADENOSYL-L-HOMOCYSTEINE


Type: L-peptide linking / Mass: 384.411 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C14H20N6O5S / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Human METTL1-WDR4 in complex with Lys-tRNA and SAH. / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 0.112 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenConc.: 3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 375.15 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 700 nm
Image recordingElectron dose: 62 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

Software
NameVersionClassification
phenix.real_space_refine1.20.1_4487refinement
PHENIX1.20.1_4487refinement
EM software
IDNameVersionCategory
2SerialEM3.8image acquisition
13cryoSPARC3D reconstruction
CTF correctionType: NONE
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.53 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 71913 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 197.98 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00156308
ELECTRON MICROSCOPYf_angle_d0.40048867
ELECTRON MICROSCOPYf_chiral_restr0.03491039
ELECTRON MICROSCOPYf_plane_restr0.0028886
ELECTRON MICROSCOPYf_dihedral_angle_d11.70762500

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