4DMG

Thermus thermophilus m5C1942 methyltransferase RlmO


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Identification and Characterization of the Thermus thermophilus 5-Methylcytidine (m5C) Methyltransferase Modifying 23 S Ribosomal RNA (rRNA) Base C1942.

Larsen, L.H.Rasmussen, A.Giessing, A.M.Jogl, G.Kirpekar, F.

(2012) J Biol Chem 287: 27593-27600

  • DOI: 10.1074/jbc.M112.376160
  • Primary Citation of Related Structures:  
    4DMG

  • PubMed Abstract: 
  • Methylation of cytidines at carbon-5 is a common posttranscriptional RNA modification encountered across all domains of life. Here, we characterize the modifications of C1942 and C1962 in Thermus thermophilus 23 S rRNA as 5-methylcytidines (m(5)C) and identify the two associated methyltransferases ...

    Methylation of cytidines at carbon-5 is a common posttranscriptional RNA modification encountered across all domains of life. Here, we characterize the modifications of C1942 and C1962 in Thermus thermophilus 23 S rRNA as 5-methylcytidines (m(5)C) and identify the two associated methyltransferases. The methyltransferase modifying C1942, named RlmO, has not been characterized previously. RlmO modifies naked 23 S rRNA, but not the assembled 50 S subunit or 70 S ribosomes. The x-ray crystal structure of this enzyme in complex with the S-adenosyl-l-methionine cofactor at 1.7 Å resolution confirms that RlmO is structurally related to other m(5)C rRNA methyltransferases. Key residues in the active site are located similar to the further distant 5-methyluridine methyltransferase RlmD, suggestive of a similar enzymatic mechanism. RlmO homologues are primarily found in mesophilic bacteria related to T. thermophilus. In accordance, we find that growth of the T. thermophilus strain with an inactivated C1942 methyltransferase gene is not compromised at non-optimal temperatures.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense M, Denmark.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative uncharacterized protein TTHA1493A, B393Thermus thermophilus HB8Mutation(s): 0 
Gene Names: TTHA1493
UniProt
Find proteins for Q5SI81 (Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8))
Explore Q5SI81 
Go to UniProtKB:  Q5SI81
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5SI81
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAM
Query on SAM

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.797α = 90
b = 45.998β = 96.78
c = 129.364γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
HKL-2000data reduction
BALBESphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-06-27
    Type: Initial release
  • Version 1.1: 2012-07-25
    Changes: Database references
  • Version 1.2: 2012-08-29
    Changes: Database references
  • Version 1.3: 2017-11-15
    Changes: Refinement description