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- PDB-8x4l: Crystal structure of the N132A mutant of DIMT1 from Pyrococcus ho... -

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Basic information

Entry
Database: PDB / ID: 8x4l
TitleCrystal structure of the N132A mutant of DIMT1 from Pyrococcus horikoshii
ComponentsProbable ribosomal RNA small subunit methyltransferase A
KeywordsTRANSFERASE / Archaea / KsgA/DIMT1 / rRNA methyltransferase / SAM / SAH / SFG
Function / homology
Function and homology information


rRNA (adenine-N6,N6-)-dimethyltransferase activity / Transferases; Transferring one-carbon groups; Methyltransferases / RNA binding / cytoplasm
Similarity search - Function
rRNA adenine dimethylase-like, C-terminal / Ribosomal RNA adenine dimethylase / Ribosomal RNA adenine methylase transferase, conserved site / Ribosomal RNA adenine methylase transferase, N-terminal / Ribosomal RNA adenine dimethylases signature. / Ribosomal RNA adenine dimethylases / Ribosomal RNA adenine methyltransferase KsgA/Erm / Ribosomal RNA adenine dimethylase / rRNA adenine N(6)-methyltransferase family profile. / S-adenosyl-L-methionine-dependent methyltransferase superfamily
Similarity search - Domain/homology
ARGININE / DI(HYDROXYETHYL)ETHER / SULFITE ION / Probable ribosomal RNA small subunit methyltransferase A
Similarity search - Component
Biological speciesPyrococcus horikoshii OT3 (archaea)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.6 Å
AuthorsSaha, S. / Kanaujia, S.P.
Funding support India, 1items
OrganizationGrant numberCountry
Science and Engineering Research Board (SERB)EEQ/2021/000060 India
CitationJournal: Structure / Year: 2024
Title: Structural and functional characterization of archaeal DIMT1 unveils distinct protein dynamics essential for efficient catalysis.
Authors: Saha, S. / Kanaujia, S.P.
History
DepositionNov 15, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 28, 2024Provider: repository / Type: Initial release
Revision 1.1Oct 16, 2024Group: Database references / Structure summary / Category: citation / pdbx_entry_details
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Probable ribosomal RNA small subunit methyltransferase A
B: Probable ribosomal RNA small subunit methyltransferase A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)68,44124
Polymers66,6442
Non-polymers1,79722
Water2,072115
1
A: Probable ribosomal RNA small subunit methyltransferase A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)34,34514
Polymers33,3221
Non-polymers1,02313
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
B: Probable ribosomal RNA small subunit methyltransferase A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)34,09610
Polymers33,3221
Non-polymers7749
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)116.220, 80.550, 84.380
Angle α, β, γ (deg.)90.00, 114.94, 90.00
Int Tables number5
Space group name H-MC121
Components on special symmetry positions
IDModelComponents
11B-420-

HOH

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Components

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Protein , 1 types, 2 molecules AB

#1: Protein Probable ribosomal RNA small subunit methyltransferase A


Mass: 33322.094 Da / Num. of mol.: 2 / Mutation: N132A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pyrococcus horikoshii OT3 (archaea) / Strain: OT3 / Gene: DIMT1 / Plasmid: pET28a / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / Variant (production host): Rosetta
References: UniProt: O59487, 16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase

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Non-polymers , 7 types, 137 molecules

#2: Chemical
ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: Zn
#3: Chemical
ChemComp-SO3 / SULFITE ION


Mass: 80.063 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: SO3
#4: Chemical
ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL


Mass: 62.068 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: C2H6O2
#5: Chemical ChemComp-ARG / ARGININE


Type: L-peptide linking / Mass: 175.209 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C6H15N4O2
#6: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3H8O3
#7: Chemical ChemComp-PEG / DI(HYDROXYETHYL)ETHER


Mass: 106.120 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C4H10O3
#8: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 115 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN
Has protein modificationN

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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: 2.5 Å3/Da / Density % sol: 50.9 % / Description: C-centered Monoclinic
Crystal growTemperature: 293 K / Method: microbatch / pH: 6.5
Details: 0.2 M Zinc Acetate Dihydrate, 0.1 M Sodium Cacodylate Trihydrate pH 6.5, 18% (w/v) PEG 8000

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Data collection

DiffractionMean temperature: 100 K / Serial crystal experiment: N
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU MICROMAX-007 HF / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV++ / Detector: IMAGE PLATE / Date: Sep 6, 2022 / Details: VariMax HF
RadiationMonochromator: Nickel filter / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.6→76.51 Å / Num. obs: 21707 / % possible obs: 99.5 % / Redundancy: 4.7 % / CC1/2: 0.992 / Rmerge(I) obs: 0.126 / Rpim(I) all: 0.061 / Rrim(I) all: 0.141 / Χ2: 0.7 / Net I/σ(I): 6.5 / Num. measured all: 102825
Reflection shellResolution: 2.6→2.72 Å / % possible obs: 98.9 % / Redundancy: 4.7 % / Rmerge(I) obs: 0.485 / Num. measured all: 12471 / Num. unique obs: 2644 / CC1/2: 0.844 / Rpim(I) all: 0.238 / Rrim(I) all: 0.543 / Χ2: 0.62 / Net I/σ(I) obs: 2.4

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Processing

Software
NameVersionClassification
HKL-30003000data collection
MOSFLM7.4.0data reduction
Aimless0.7.13data scaling
PHASER2.8.3phasing
REFMAC5.8.0352refinement
Coot0.9.8.92model building
PDB_EXTRACT4.1data extraction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 2.6→64.08 Å / Cor.coef. Fo:Fc: 0.947 / Cor.coef. Fo:Fc free: 0.917 / SU B: 23.156 / SU ML: 0.252 / Cross valid method: THROUGHOUT / ESU R: 0.71 / ESU R Free: 0.3 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.23939 1096 5 %RANDOM
Rwork0.18788 ---
obs0.19047 20609 99.25 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 50.476 Å2
Baniso -1Baniso -2Baniso -3
1-0.19 Å2-0 Å2-0.11 Å2
2---2.49 Å2-0 Å2
3---1.68 Å2
Refinement stepCycle: 1 / Resolution: 2.6→64.08 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4384 0 88 115 4587
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0070.0124532
X-RAY DIFFRACTIONr_bond_other_d0.0010.0164462
X-RAY DIFFRACTIONr_angle_refined_deg1.4431.6466074
X-RAY DIFFRACTIONr_angle_other_deg0.4861.56710390
X-RAY DIFFRACTIONr_dihedral_angle_1_deg7.7635538
X-RAY DIFFRACTIONr_dihedral_angle_2_deg9.085536
X-RAY DIFFRACTIONr_dihedral_angle_3_deg17.33310890
X-RAY DIFFRACTIONr_dihedral_angle_4_deg
X-RAY DIFFRACTIONr_chiral_restr0.070.2687
X-RAY DIFFRACTIONr_gen_planes_refined0.0060.024958
X-RAY DIFFRACTIONr_gen_planes_other0.0010.02858
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it2.5262.9532164
X-RAY DIFFRACTIONr_mcbond_other2.5262.9532164
X-RAY DIFFRACTIONr_mcangle_it4.1984.4182698
X-RAY DIFFRACTIONr_mcangle_other4.1984.4182699
X-RAY DIFFRACTIONr_scbond_it3.2533.3632368
X-RAY DIFFRACTIONr_scbond_other3.2533.3632369
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other5.1184.8483377
X-RAY DIFFRACTIONr_long_range_B_refined8.13941.0545031
X-RAY DIFFRACTIONr_long_range_B_other8.13541.0065022
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 2.6→2.667 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.31 83 -
Rwork0.283 1488 -
obs--98.5 %
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL11 (°2)L12 (°2)L13 (°2)L22 (°2)L23 (°2)L33 (°2)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T11 (Å2)T12 (Å2)T13 (Å2)T22 (Å2)T23 (Å2)T33 (Å2)Origin x (Å)Origin y (Å)Origin z (Å)
10.29140.1950.79191.39391.17342.7459-0.08250.03160.022-0.08340.0885-0.1707-0.08930.0604-0.0060.286-0.04260.06010.0205-0.01360.043918.953117.773135.2475
22.7349-0.2143-0.43882.70.33610.4333-0.00250.0576-0.2260.22370.0571-0.0058-0.0374-0.0601-0.05460.29880.0120.05270.01370.01060.048831.182825.497.7979
Refinement TLS group
IDRefine-IDRefine TLS-IDAuth asym-IDAuth seq-ID
1X-RAY DIFFRACTION1A21 - 290
2X-RAY DIFFRACTION2B21 - 290

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