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- PDB-2egb: Crystal structure of Glu140 to Asn mutant of Diphthine synthase -

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Basic information

Entry
Database: PDB / ID: 2egb
TitleCrystal structure of Glu140 to Asn mutant of Diphthine synthase
Componentsdiphthine synthase
KeywordsTRANSFERASE / Structural Genomics / NPPSFA / National Project on Protein Structural and Functional Analyses / RIKEN Structural Genomics/Proteomics Initiative / RSGI
Function / homology
Function and homology information


diphthine synthase / diphthine synthase activity / protein histidyl modification to diphthamide / methylation
Similarity search - Function
Diphthine synthase / Tetrapyrrole methylase, C-terminal domain / Methyltransferase, Cobalt-precorrin-4 Transmethylase; Domain 2 / Tetrapyrrole methylase, N-terminal domain / Tetrapyrrole methylase, subdomain 2 / Cobalt-precorrin-4 Transmethylase; domain 1 / Tetrapyrrole methylase / Tetrapyrrole (Corrin/Porphyrin) Methylases / Tetrapyrrole methylase, subdomain 1 / Tetrapyrrole methylase superfamily ...Diphthine synthase / Tetrapyrrole methylase, C-terminal domain / Methyltransferase, Cobalt-precorrin-4 Transmethylase; Domain 2 / Tetrapyrrole methylase, N-terminal domain / Tetrapyrrole methylase, subdomain 2 / Cobalt-precorrin-4 Transmethylase; domain 1 / Tetrapyrrole methylase / Tetrapyrrole (Corrin/Porphyrin) Methylases / Tetrapyrrole methylase, subdomain 1 / Tetrapyrrole methylase superfamily / 2-Layer Sandwich / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
S-ADENOSYL-L-HOMOCYSTEINE / Diphthine synthase
Similarity search - Component
Biological speciesPyrococcus horikoshii (archaea)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.9 Å
AuthorsMizutani, H. / Matsuura, Y. / Krishna Swamy, B.S. / Simanshu, D.K. / Murthy, M.R.N. / Kunishima, N. / RIKEN Structural Genomics/Proteomics Initiative (RSGI)
CitationJournal: Acta Crystallogr.,Sect.D / Year: 2008
Title: Systematic study on crystal-contact engineering of diphthine synthase: influence of mutations at crystal-packing regions on X-ray diffraction quality.
Authors: Mizutani, H. / Saraboji, K. / Malathy Sony, S.M. / Ponnuswamy, M.N. / Kumarevel, T. / Krishna Swamy, B.S. / Simanshu, D.K. / Murthy, M.R. / Kunishima, N.
History
DepositionFeb 28, 2007Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 28, 2007Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Source and taxonomy / Version format compliance
Revision 1.2Nov 10, 2021Group: Database references / Derived calculations / Category: database_2 / struct_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.3Oct 25, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 1.4Aug 6, 2025Group: Data collection / Database references / Structure summary
Category: chem_comp / citation ...chem_comp / citation / citation_author / pdbx_entry_details
Item: _chem_comp.mon_nstd_flag / _chem_comp.type ..._chem_comp.mon_nstd_flag / _chem_comp.type / _citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: diphthine synthase
B: diphthine synthase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)61,30119
Polymers59,1972
Non-polymers2,10417
Water10,070559
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)105.002, 105.002, 137.047
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number92
Space group name H-MP41212

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Components

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Protein , 1 types, 2 molecules AB

#1: Protein diphthine synthase / Diphthamide biosynthesis methyltransferase


Mass: 29598.354 Da / Num. of mol.: 2 / Mutation: E140N
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pyrococcus horikoshii (archaea) / Strain: OT3 / Gene: dphB / Plasmid: pET11a / Production host: Escherichia coli (E. coli) / Strain (production host): BL21-CodonPlus(DE3)-RIL / References: UniProt: O58456, diphthine synthase

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Non-polymers , 5 types, 576 molecules

#2: Chemical
ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: SO4
#3: Chemical ChemComp-SAH / S-ADENOSYL-L-HOMOCYSTEINE


Mass: 384.411 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C14H20N6O5S
#4: Chemical ChemComp-MES / 2-(N-MORPHOLINO)-ETHANESULFONIC ACID


Mass: 195.237 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C6H13NO4S / Comment: pH buffer*YM
#5: Chemical
ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C3H8O3
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 559 / Source method: isolated from a natural source / Formula: H2O

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Details

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: 3.19 Å3/Da / Density % sol: 61.43 %
Crystal growTemperature: 295 K / Method: microbatch / pH: 6.5
Details: 1.8M AMMONIUM SULFATE, 0.1M MES, 0.01M Co CHLORIDE, pH 6.5, microbatch, temperature 295K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SPring-8 / Beamline: BL26B1 / Wavelength: 1 Å
DetectorType: RIGAKU RAXIS V / Detector: IMAGE PLATE / Date: Oct 5, 2006 / Details: mirrors
RadiationMonochromator: bending magnet / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.9→30 Å / Num. all: 59809 / Num. obs: 59809 / % possible obs: 98.1 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 9.5 % / Biso Wilson estimate: 28.6 Å2 / Rmerge(I) obs: 0.067 / Rsym value: 0.066 / Net I/σ(I): 16.1
Reflection shellResolution: 1.9→1.97 Å / Redundancy: 9.4 % / Rmerge(I) obs: 0.393 / Mean I/σ(I) obs: 5.31 / Num. unique all: 5924 / Rsym value: 0.372 / % possible all: 99.4

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Processing

Software
NameVersionClassification
CNS1.1refinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1WNG

1wng


Resolution: 1.9→30 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 2276688.58 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.223 2986 5 %RANDOM
Rwork0.201 ---
all0.202 59760 --
obs0.201 59760 98 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 66.6124 Å2 / ksol: 0.377187 e/Å3
Displacement parametersBiso mean: 38.5 Å2
Baniso -1Baniso -2Baniso -3
1-0 Å20 Å20 Å2
2--0 Å20 Å2
3---0 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.26 Å0.23 Å
Luzzati d res low-5 Å
Luzzati sigma a0.21 Å0.19 Å
Refinement stepCycle: LAST / Resolution: 1.9→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4170 0 124 559 4853
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.005
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d22.6
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.75
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.321.5
X-RAY DIFFRACTIONc_mcangle_it2.052
X-RAY DIFFRACTIONc_scbond_it1.942
X-RAY DIFFRACTIONc_scangle_it2.972.5
LS refinement shellResolution: 1.9→2.02 Å / Rfactor Rfree error: 0.013 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.287 511 5.2 %
Rwork0.265 9407 -
obs--99.4 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2water_rep.paramwater.top
X-RAY DIFFRACTION3ion.paramion.top
X-RAY DIFFRACTION4sah.paramsah.top
X-RAY DIFFRACTION5mes.parammes.top

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