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- PDB-4b44: Bacterial translation initiation factor IF2 (1-363), complex with... -

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Basic information

Entry
Database: PDB / ID: 4b44
TitleBacterial translation initiation factor IF2 (1-363), complex with GDP at pH8.0
ComponentsTRANSLATION INITIATION FACTOR IF-2
KeywordsTRANSLATION / INITIATION / GTP HYDROLYSIS MECHANISM
Function / homology
Function and homology information


translation initiation factor activity / GTPase activity / GTP binding / cytoplasm
Similarity search - Function
Arc Repressor Mutant, subunit A - #2480 / Translation initiation factor IF-2, N-terminal / Translation initiation factor IF-2, N-terminal region / Translation initiation factor IF-2, domain II / Initiation factor 2 signature. / Translation initiation factor IF-2, bacterial-like / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 / Translation initiation factor IF- 2 / Translation initiation factor IF-2, domain 3 superfamily ...Arc Repressor Mutant, subunit A - #2480 / Translation initiation factor IF-2, N-terminal / Translation initiation factor IF-2, N-terminal region / Translation initiation factor IF-2, domain II / Initiation factor 2 signature. / Translation initiation factor IF-2, bacterial-like / Translation initiation factor IF- 2, domain 3 / Translation-initiation factor 2 / Translation initiation factor IF- 2 / Translation initiation factor IF-2, domain 3 superfamily / Translation factors / Translation elongation factor EFTu-like, domain 2 / Elongation factor Tu domain 2 / Translational (tr)-type GTP-binding domain / Elongation factor Tu GTP binding domain / Translational (tr)-type guanine nucleotide-binding (G) domain profile. / Elongation Factor Tu (Ef-tu); domain 3 / Small GTP-binding protein domain / Arc Repressor Mutant, subunit A / Translation protein, beta-barrel domain superfamily / P-loop containing nucleotide triphosphate hydrolases / Beta Barrel / P-loop containing nucleoside triphosphate hydrolase / Rossmann fold / Orthogonal Bundle / 3-Layer(aba) Sandwich / Mainly Beta / Mainly Alpha / Alpha Beta
Similarity search - Domain/homology
GUANOSINE-5'-DIPHOSPHATE / Translation initiation factor IF-2
Similarity search - Component
Biological speciesTHERMUS THERMOPHILUS (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.7 Å
AuthorsSimonetti, A. / Urzhumtsev, A. / Klaholz, B.P.
CitationJournal: To be Published
Title: Molecular Basis of GTP Hydrolysis by Bacterial Translation Initiation Factor If2
Authors: Simonetti, A. / Marzi, S. / Fabbretti, A. / Myasnikov, A.G. / Hazemann, I. / Jenner, L. / Urzhumtsev, A. / Gualerzi, C.O. / Klaholz, B.P.
History
DepositionJul 27, 2012Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 18, 2013Provider: repository / Type: Initial release
Revision 1.1Feb 11, 2015Group: Structure summary
Revision 1.2Dec 20, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Other / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_database_status / pdbx_initial_refinement_model / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_database_status.status_code_sf / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Remark 700 SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "AC" IN EACH CHAIN ON SHEET RECORDS BELOW ... SHEET DETERMINATION METHOD: DSSP THE SHEETS PRESENTED AS "AC" IN EACH CHAIN ON SHEET RECORDS BELOW IS ACTUALLY AN 6-STRANDED BARREL THIS IS REPRESENTED BY A 7-STRANDED SHEET IN WHICH THE FIRST AND LAST STRANDS ARE IDENTICAL.

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: TRANSLATION INITIATION FACTOR IF-2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)40,6382
Polymers40,1951
Non-polymers4431
Water45025
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)45.150, 62.200, 159.960
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein TRANSLATION INITIATION FACTOR IF-2 / TRANSLATION INITIATION FACTOR IF2


Mass: 40194.973 Da / Num. of mol.: 1 / Fragment: RESIDUES 1-363
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) THERMUS THERMOPHILUS (bacteria) / Strain: HB8 / Description: DSM 579 / Production host: ESCHERICHIA COLI (E. coli) / Strain (production host): BL21(DE3) / References: UniProt: P48515
#2: Chemical ChemComp-GDP / GUANOSINE-5'-DIPHOSPHATE / Guanosine diphosphate


Type: RNA linking / Mass: 443.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N5O11P2 / Comment: GDP, energy-carrying molecule*YM
#3: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 25 / 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: 2.83 Å3/Da / Density % sol: 50.6 % / Description: NONE
Crystal growpH: 8 / Details: pH 8.0

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Data collection

DiffractionMean temperature: 295 K
Diffraction sourceSource: SYNCHROTRON / Site: SLS / Beamline: X06DA / Wavelength: 0.978
DetectorType: DECTRIS PILATUS 6M / Detector: PIXEL
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.978 Å / Relative weight: 1
ReflectionResolution: 2.7→50 Å / Num. obs: 12840 / % possible obs: 99 % / Observed criterion σ(I): 3 / Redundancy: 4.3 % / Rmerge(I) obs: 0.16 / Net I/σ(I): 11.5
Reflection shellResolution: 2.7→2.75 Å / Redundancy: 4.4 % / Rmerge(I) obs: 1.13 / Mean I/σ(I) obs: 1.8 / % possible all: 99.5

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Processing

Software
NameVersionClassification
PHENIX(PHENIX.REFINE: DEV_1269)refinement
XDSdata reduction
XDSdata scaling
PHENIXphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 4B3X
Resolution: 2.7→43.452 Å / SU ML: 0.41 / σ(F): 2 / Phase error: 29.11 / Stereochemistry target values: ML
RfactorNum. reflection% reflection
Rfree0.2713 1284 10 %
Rwork0.2116 --
obs0.2175 12838 98.84 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Refinement stepCycle: LAST / Resolution: 2.7→43.452 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2682 0 28 25 2735
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0142754
X-RAY DIFFRACTIONf_angle_d1.2123716
X-RAY DIFFRACTIONf_dihedral_angle_d18.2731074
X-RAY DIFFRACTIONf_chiral_restr0.08414
X-RAY DIFFRACTIONf_plane_restr0.004491
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
2.7002-2.80830.45471380.35451236X-RAY DIFFRACTION97
2.8083-2.93610.37071380.30261240X-RAY DIFFRACTION99
2.9361-3.09090.31011400.25981266X-RAY DIFFRACTION100
3.0909-3.28450.31841430.24891282X-RAY DIFFRACTION100
3.2845-3.53790.30171400.21991269X-RAY DIFFRACTION99
3.5379-3.89380.24541440.18561285X-RAY DIFFRACTION99
3.8938-4.45670.24451410.18011276X-RAY DIFFRACTION98
4.4567-5.61310.27031450.18541310X-RAY DIFFRACTION99
5.6131-43.45790.21691550.19721390X-RAY DIFFRACTION99

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