5ZQ1

Crystal structure of spRlmCD with U1939loop RNA at 3.10 angstrom


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Unveiling the structural features that determine the dual methyltransferase activities of Streptococcus pneumoniae RlmCD

Jiang, Y.Yu, H.Li, F.Cheng, L.Zhu, L.Shi, Y.Gong, Q.

(2018) PLoS Pathog 14: e1007379-e1007379

  • DOI: 10.1371/journal.ppat.1007379
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Methyltransferase RlmCD was previously shown to be responsible for the introduction of C5 methylation at both U747 and U1939 of the 23S ribosomal RNA in Streptococcus pneumoniae. Intriguingly, its structural homologue, RumA, can only catalyze the met ...

    Methyltransferase RlmCD was previously shown to be responsible for the introduction of C5 methylation at both U747 and U1939 of the 23S ribosomal RNA in Streptococcus pneumoniae. Intriguingly, its structural homologue, RumA, can only catalyze the methylation of U1939, while RlmC is the dedicated enzyme for m5U747 in Escherichia coli. In this study, we describe the structure of RlmCD in complex with its cofactor and the RNA substrate containing U747 at 2.00 Å or U1939 at 3.10 Å. We demonstrate that multiple structural features collaborate to establish the dual enzymatic activities of RlmCD. Of them, the side-chain rearrangement of F145 was observed to be an unusual mechanism through which RlmCD can discriminate between U747- and U1939-containing RNA substrate by switching the intermolecular aromatic stacking between protein and RNA on/off. An in-vitro methyltransferase assay and electrophoretic mobility shift assay were performed to validate these findings. Overall, our complex structures allow for a better understanding of the dual-functional mechanism of RlmCD, suggesting useful implications for the evolution of the RumA-type enzyme and the potential development of antibiotic drugs against S. pneumoniae.


    Organizational Affiliation

    Hefei National Laboratory for Physical Science at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei, Anhui, China.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized RNA methyltransferase SP_1029A452Streptococcus pneumoniae TIGR4Mutation(s): 1 
Gene Names: SP_1029
EC: 2.1.1
Find proteins for Q97R12 (Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4))
Explore Q97R12 
Go to UniProtKB:  Q97R12
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsLengthOrganism
RNA (5'-R(*AP*AP*AP*(MUM)P*UP*CP*CP*U)-3')B8Streptococcus pneumoniae TIGR4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.10 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 47.386α = 90
b = 96.097β = 90
c = 114.162γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2018-04-17 
  • Released Date: 2018-10-24 
  • Deposition Author(s): Yu, H.L., Jiang, Y.Y.

Revision History 

  • Version 1.0: 2018-10-24
    Type: Initial release
  • Version 1.1: 2018-11-14
    Changes: Data collection, Database references, Structure summary