2BH2

Crystal Structure of E. coli 5-methyluridine methyltransferase RumA in complex with ribosomal RNA substrate and S-adenosylhomocysteine.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A Unique RNA Fold in the Ruma-RNA-Cofactor Ternary Complex Contributes to Substrate Selectivity and Enzymatic Function

Lee, T.T.Agarwalla, S.Stroud, R.M.

(2005) Cell 120: 599

  • DOI: 10.1016/j.cell.2004.12.037
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • A single base (U1939) within E. coli 23S ribosomal RNA is methylated by its dedicated enzyme, RumA. The structure of RumA/RNA/S-adenosylhomocysteine uncovers the mechanism for achieving unique selectivity. The single-stranded substrate is "refolded" ...

    A single base (U1939) within E. coli 23S ribosomal RNA is methylated by its dedicated enzyme, RumA. The structure of RumA/RNA/S-adenosylhomocysteine uncovers the mechanism for achieving unique selectivity. The single-stranded substrate is "refolded" on the enzyme into a compact conformation with six key intra-RNA interactions. The RNA substrate contributes directly to catalysis. In addition to the target base, a second base is "flipped out" from the core loop to stack against the adenine of the cofactor S-adenosylhomocysteine. Nucleotides in permuted sequence order are stacked into the site vacated by the everted target U1939 and compensate for the energetic penalty of base eversion. The 3' hairpin segment of the RNA binds distal to the active site and provides binding energy that contributes to enhanced catalytic efficiency. Active collaboration of RNA in catalysis leads us to conclude that RumA and its substrate RNA may reflect features from the earliest RNA-protein era.


    Related Citations: 
    • Crystal Structure of Ruma, an Iron-Sulfur Cluster Containing E. Coli Ribosomal RNA 5-Methyluridine Methyltransferase
      Lee, T.T., Agarwalla, S., Stroud, R.M.
      (2004) Structure 12: 397

    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA 94143, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
23S RRNA (URACIL-5-)-METHYLTRANSFERASE RUMAA, B433Escherichia coliMutation(s): 0 
EC: 2.1.1 (PDB Primary Data), 2.1.1.190 (UniProt)
Find proteins for P55135 (Escherichia coli (strain K12))
Explore P55135 
Go to UniProtKB:  P55135
Protein Feature View
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  • Reference Sequence

Find similar nucleic acids by: Sequence   |  Structure

Entity ID: 2
MoleculeChainsLengthOrganism
23S RIBOSOMAL RNA 1932-1968C, D37Escherichia coli
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SAH
Query on SAH

Download CCD File 
A, B
S-ADENOSYL-L-HOMOCYSTEINE
C14 H20 N6 O5 S
ZJUKTBDSGOFHSH-WFMPWKQPSA-N
 Ligand Interaction
SF4
Query on SF4

Download CCD File 
A, B
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.177 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 190.061α = 90
b = 63.542β = 125.15
c = 112.019γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-30
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance