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- PDB-1qan: THE STRUCTURE OF THE RRNA METHYLTRANSFERASE ERMC': IMPLICATIONS F... -

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Basic information

Entry
Database: PDB / ID: 1qan
TitleTHE STRUCTURE OF THE RRNA METHYLTRANSFERASE ERMC': IMPLICATIONS FOR THE REACTION MECHANISM
ComponentsERMC' METHYLTRANSFERASE
KeywordsTRANSFERASE / BINARY COMPLEX WITH S-ADENOSYL-HOMOCYSTEINE
Function / homology
Function and homology information


23S rRNA (adenine2085-N6)-dimethyltransferase / 23S rRNA (adenine(2085)-N(6))-dimethyltransferase activity / rRNA (adenine-N6,N6-)-dimethyltransferase activity / response to antibiotic / RNA binding / cytosol
Similarity search - Function
rRNA adenine dimethylase, C-terminal domain / rRNA adenine dimethylase-like, C-terminal / Ribosomal RNA adenine methylase transferase, conserved site / Ribosomal RNA adenine dimethylases signature. / Ribosomal RNA adenine methylase transferase, N-terminal / Ribosomal RNA adenine dimethylases / Ribosomal RNA adenine methyltransferase KsgA/Erm / Ribosomal RNA adenine dimethylase / rRNA adenine N(6)-methyltransferase family profile. / Helicase, Ruva Protein; domain 3 ...rRNA adenine dimethylase, C-terminal domain / rRNA adenine dimethylase-like, C-terminal / Ribosomal RNA adenine methylase transferase, conserved site / Ribosomal RNA adenine dimethylases signature. / Ribosomal RNA adenine methylase transferase, N-terminal / Ribosomal RNA adenine dimethylases / Ribosomal RNA adenine methyltransferase KsgA/Erm / Ribosomal RNA adenine dimethylase / rRNA adenine N(6)-methyltransferase family profile. / Helicase, Ruva Protein; domain 3 / Vaccinia Virus protein VP39 / S-adenosyl-L-methionine-dependent methyltransferase superfamily / Rossmann fold / Orthogonal Bundle / 3-Layer(aba) Sandwich / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
ACETATE ION / S-ADENOSYL-L-HOMOCYSTEINE / rRNA adenine N-6-methyltransferase
Similarity search - Component
Biological speciesBacillus subtilis (bacteria)
MethodX-RAY DIFFRACTION / Resolution: 2.4 Å
AuthorsSchluckebier, G. / Zhong, P. / Stewart, K.D. / Kavanaugh, T.J. / Abad-Zapatero, C.
Citation
Journal: J.Mol.Biol. / Year: 1999
Title: The 2.2 A structure of the rRNA methyltransferase ErmC' and its complexes with cofactor and cofactor analogs: implications for the reaction mechanism.
Authors: Schluckebier, G. / Zhong, P. / Stewart, K.D. / Kavanaugh, T.J. / Abad-Zapatero, C.
#1: Journal: Biochemistry / Year: 1998
Title: Crystal structure of ErmC', an RNA methyltransferase which mediates antibiotic resistance in bacteria
Authors: Bussiere, D.E. / Muchmore, S.W. / Dealwis, C.G. / Schluckebier, G. / Nienaber, V.L. / Edalji, R.P. / Walter, K.A. / Ladror, U.S. / Holzman, T.F. / Abad-Zapatero, C.
History
DepositionMar 26, 1999Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 29, 2000Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 8, 2017Group: Structure summary
Revision 1.4Oct 4, 2017Group: Refinement description / Category: software
Revision 1.5Feb 14, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: ERMC' METHYLTRANSFERASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)29,4584
Polymers28,9561
Non-polymers5023
Water1,946108
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)81.21, 81.21, 122.11
Angle α, β, γ (deg.)90, 90, 90
Int Tables number96
Cell settingtetragonal
Space group name H-MP43212

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Components

#1: Protein ERMC' METHYLTRANSFERASE / E.C.2.1.1.48 / RRNA ADENINE N-6-METHYLTRANSFERASE


Mass: 28955.529 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bacillus subtilis (bacteria) / Production host: Escherichia coli (E. coli) / References: UniProt: P13956, EC: 2.1.1.48
#2: Chemical ChemComp-ACT / ACETATE ION


Mass: 59.044 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C2H3O2
#3: 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
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 108 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 3.48 Å3/Da / Density % sol: 64.61 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7.8
Details: PEG 8000, ammonium acetate, pH 7.8 at 298 K, VAPOR DIFFUSION, HANGING DROP
Crystal grow
*PLUS
pH: 7.5
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
15-8 mg/mlprotein1drop
225 mMTris-HCl1drop
3100 mM1dropNaCl
42 mMdithiothreitol1drop
510 %(v/v)glycerol1drop
6100 mMTes1reservoir
7500 mMammonium acetate1reservoir
815 %(w/v)PEG80001reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418
DetectorType: RIGAKU RAXIS IIC / Detector: IMAGE PLATE / Date: Jun 3, 1997
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.4→50 Å / Num. all: 15743 / Num. obs: 15743 / % possible obs: 94.5 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.6 % / Biso Wilson estimate: 59 Å2 / Rmerge(I) obs: 0.047 / Net I/σ(I): 17.6
Reflection shellResolution: 2.4→2.49 Å / Redundancy: 2.7 % / Rmerge(I) obs: 0.264 / Num. unique all: 1220 / % possible all: 75.7
Reflection
*PLUS
Num. measured all: 56913
Reflection shell
*PLUS
% possible obs: 75.7 % / Mean I/σ(I) obs: 4

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Processing

Software
NameClassification
CNSrefinement
SCALEPACKdata scaling
CNSphasing
RefinementResolution: 2.4→50 Å / σ(F): 0 / σ(I): 0
RfactorNum. reflection
Rfree0.263 1593
Rwork0.228 -
all-15730
obs-15730
Refinement stepCycle: LAST / Resolution: 2.4→50 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1973 0 34 108 2115
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.009
X-RAY DIFFRACTIONx_angle_d1.4
Software
*PLUS
Name: CNS / Classification: refinement
Refinement
*PLUS
Highest resolution: 2.4 Å / Lowest resolution: 50 Å / σ(F): 0 / Rfactor obs: 0.228
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDType
X-RAY DIFFRACTIONc_bond_d
X-RAY DIFFRACTIONc_angle_d

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