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- PDB-1bi2: STRUCTURE OF APO-AND HOLO-DIPHTHERIA TOXIN REPRESSOR -

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Basic information

Entry
Database: PDB / ID: 1bi2
TitleSTRUCTURE OF APO-AND HOLO-DIPHTHERIA TOXIN REPRESSOR
ComponentsDIPHTHERIA TOXIN REPRESSOR
KeywordsREPRESSOR / TRANSCRIPTION REGULATION / DNA-BINDING / IRON
Function / homology
Function and homology information


transition metal ion binding / SH3 domain binding / protein dimerization activity / DNA-binding transcription factor activity / negative regulation of DNA-templated transcription / DNA binding / identical protein binding / cytoplasm
Similarity search - Function
Diphteria toxin repressor, SH3 domain / Diphteria toxin repressor SH3 domain / Ferrous iron transport protein A (FeoA) / Iron dependent repressor, metal binding and dimerisation domain / Ferrous iron transporter, core domain / Ferrous iron transporter FeoA domain / FeoA / : / DtxR-type HTH domain profile. / DTXR-type HTH domain ...Diphteria toxin repressor, SH3 domain / Diphteria toxin repressor SH3 domain / Ferrous iron transport protein A (FeoA) / Iron dependent repressor, metal binding and dimerisation domain / Ferrous iron transporter, core domain / Ferrous iron transporter FeoA domain / FeoA / : / DtxR-type HTH domain profile. / DTXR-type HTH domain / Iron dependent repressor, N-terminal DNA binding domain / Iron dependent repressor, metal binding and dimerisation domain / Iron dependent repressor / Iron dependent repressor, metal binding and dimerisation domain superfamily / Iron dependent repressor, metal binding and dimerisation domain / Helix-turn-helix diphteria tox regulatory element / Diphtheria Toxin Repressor; domain 2 / Transcriptional repressor, C-terminal / Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain / SH3 type barrels. / Arc Repressor Mutant, subunit A / Roll / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily / Orthogonal Bundle / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
Diphtheria toxin repressor / Diphtheria toxin repressor
Similarity search - Component
Biological speciesCorynebacterium diphtheriae (bacteria)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.3 Å
AuthorsPohl, E. / Hol, W.G.J.
Citation
Journal: J.Biol.Chem. / Year: 1998
Title: Motion of the DNA-binding domain with respect to the core of the diphtheria toxin repressor (DtxR) revealed in the crystal structures of apo- and holo-DtxR.
Authors: Pohl, E. / Holmes, R.K. / Hol, W.G.
#1: Journal: Structure / Year: 1995
Title: Three-Dimensional Structure of the Diphtheria Toxin Repressor in Complex with Divalent Cation Co-Repressors
Authors: Qiu, X. / Verlinde, C.L. / Zhang, S. / Schmitt, M.P. / Holmes, R.K. / Hol, W.G.
#2: Journal: Proc.Natl.Acad.Sci.USA / Year: 1992
Title: Purification and Characterization of the Diphtheria Toxin Repressor
Authors: Schmitt, M.P. / Twiddy, E.M. / Holmes, R.K.
History
DepositionJun 21, 1998Processing site: BNL
Revision 1.0Jun 22, 1999Provider: repository / Type: Initial release
Revision 1.1Mar 24, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 7, 2024Group: Data collection / Database references / Other
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_database_status
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_database_status.process_site

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: DIPHTHERIA TOXIN REPRESSOR
B: DIPHTHERIA TOXIN REPRESSOR


Theoretical massNumber of molelcules
Total (without water)50,7002
Polymers50,7002
Non-polymers00
Water3,009167
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area1580 Å2
ΔGint-14 kcal/mol
Surface area16970 Å2
MethodPISA
Unit cell
Length a, b, c (Å)63.000, 63.000, 216.200
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number154
Space group name H-MP3221

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Components

#1: Protein DIPHTHERIA TOXIN REPRESSOR / DTXR


Mass: 25349.795 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Corynebacterium diphtheriae (bacteria) / Strain: C7(-) / Gene: DTXR / Plasmid: PMS298 / Gene (production host): T / Production host: Escherichia coli (E. coli) / Strain (production host): DH5-ALPHA / References: UniProt: P33120, UniProt: P0DJL7*PLUS
#2: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 167 / 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: 2.44 Å3/Da / Density % sol: 57 %
Crystal growpH: 8.5 / Details: pH 8.5
Crystal grow
*PLUS
pH: 8 / Method: vapor diffusion, hanging drop / Details: Qiu, X., (1995) Structure (London), 3, 87.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetailsChemical formula
13 mg/mlprotein1drop
250 mMTris-HCl1droppH8.0
31.0 Mammonium sulfate1drop
420 mM2-mercaptoethanol1drop
51.8-2.0 Mammonium sulfate1reservoir
610 mM1reservoirZn2+

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Data collection

DiffractionMean temperature: 293 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RUH2R / Wavelength: 1.5418
DetectorType: RIGAKU / Detector: IMAGE PLATE / Date: Aug 1, 1997 / Details: MIRRORS
RadiationMonochromator: MIRRORS / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.3→8 Å / Num. obs: 19913 / % possible obs: 88.9 % / Observed criterion σ(I): 2 / Redundancy: 3.8 % / Rmerge(I) obs: 0.06 / Rsym value: 0.06 / Net I/σ(I): 23
Reflection shellResolution: 2.4→2.5 Å / Redundancy: 2 % / Rmerge(I) obs: 0.197 / Mean I/σ(I) obs: 4.5 / Rsym value: 0.197 / % possible all: 69.7
Reflection
*PLUS
Num. measured all: 76446
Reflection shell
*PLUS
% possible obs: 69.7 %

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Processing

Software
NameClassification
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 2.3→8 Å / Cross valid method: THROUGHOUT / σ(F): 2
Details: 2FO-FC ELECTRON DENSITY IS MISSING FOR RESIDUES 1 - 3, 141 - 147 AND 199 - 200. THESE RESIDUES ARE ASSUMED TO BE DISORDERED. THE EXPERIMENTAL ELECTRON DENSITY IS WEAK OR MISSING FOR RESIDUES 148 - 226.
RfactorNum. reflection% reflectionSelection details
Rfree0.352 744 5 %RANDOM
Rwork0.257 ---
obs0.257 18605 88.9 %-
Refinement stepCycle: LAST / Resolution: 2.3→8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2661 0 0 163 2824
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.008
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg1.6
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d20.7
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.21
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it
X-RAY DIFFRACTIONx_mcangle_it
X-RAY DIFFRACTIONx_scbond_it
X-RAY DIFFRACTIONx_scangle_it
Software
*PLUS
Name: X-PLOR / Classification: refinement
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg20.7
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg1.21

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