5K7W

Crystal structure of the catalytic domain of Mettl3/Mettl14 complex with SAH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Basis for Cooperative Function of Mettl3 and Mettl14 Methyltransferases.

Wang, P.Doxtader, K.A.Nam, Y.

(2016) Mol.Cell 63: 306-317

  • DOI: 10.1016/j.molcel.2016.05.041
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • N(6)-methyladenosine (m(6)A) is a prevalent, reversible chemical modification of functional RNAs and is important for central events in biology. The core m(6)A writers are Mettl3 and Mettl14, which both contain methyltransferase domains. How Mettl3 a ...

    N(6)-methyladenosine (m(6)A) is a prevalent, reversible chemical modification of functional RNAs and is important for central events in biology. The core m(6)A writers are Mettl3 and Mettl14, which both contain methyltransferase domains. How Mettl3 and Mettl14 cooperate to catalyze methylation of adenosines has remained elusive. We present crystal structures of the complex of Mettl3/Mettl14 methyltransferase domains in apo form as well as with bound S-adenosylmethionine (SAM) or S-adenosylhomocysteine (SAH) in the catalytic site. We determine that the heterodimeric complex of methyltransferase domains, combined with CCCH motifs, constitutes the minimally required regions for creating m(6)A modifications in vitro. We also show that Mettl3 is the catalytically active subunit, while Mettl14 plays a structural role critical for substrate recognition. Our model provides a molecular explanation for why certain mutations of Mettl3 and Mettl14 lead to impaired function of the methyltransferase complex.


    Organizational Affiliation

    Cecil H. and Ida Green Center for Reproductive Biology Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Division of Basic Reproductive Biology Research, Department of Obstetrics and Gynecology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
N6-adenosine-methyltransferase 70 kDa subunit
A
225Homo sapiensMutation(s): 0 
Gene Names: METTL3 (MTA70)
EC: 2.1.1.62
Find proteins for Q86U44 (Homo sapiens)
Go to Gene View: METTL3
Go to UniProtKB:  Q86U44
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
N6-adenosine-methyltransferase subunit METTL14
B
349Homo sapiensMutation(s): 0 
Gene Names: METTL14 (KIAA1627)
Find proteins for Q9HCE5 (Homo sapiens)
Go to Gene View: METTL14
Go to UniProtKB:  Q9HCE5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

Download SDF File 
Download CCD File 
A
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 101.942α = 90.00
b = 101.942β = 90.00
c = 118.009γ = 90.00
Software Package:
Software NamePurpose
HKL-3000data reduction
PHENIXrefinement
MOLREPphasing
HKL-3000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Pew ScholarUnited States--
Packard FellowUnited States--
Welch FoundationUnited StatesI-1851
Cancer Prevention Research Institute of TexasUnited StatesR1221

Revision History 

  • Version 1.0: 2016-07-06
    Type: Initial release
  • Version 1.1: 2016-07-20
    Type: Database references
  • Version 1.2: 2016-08-10
    Type: Database references