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- PDB-1ct1: CHOLERA TOXIN B-PENTAMER MUTANT G33R BOUND TO RECEPTOR PENTASACCHARIDE -

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Basic information

Entry
Database: PDB / ID: 1ct1
TitleCHOLERA TOXIN B-PENTAMER MUTANT G33R BOUND TO RECEPTOR PENTASACCHARIDE
ComponentsCHOLERA TOXIN
KeywordsENTEROTOXIN / TOXIN-RECEPTOR COMPLEX / OLIGOSACCHARIDE
Function / homology
Function and homology information


host cell surface binding / galactose binding / catalytic complex / positive regulation of tyrosine phosphorylation of STAT protein / toxin activity / periplasmic space / host cell plasma membrane / extracellular region / membrane
Similarity search - Function
Heat-labile enterotoxin, B chain / Heat-labile enterotoxin beta chain / OB fold (Dihydrolipoamide Acetyltransferase, E2P) - #110 / Enterotoxin / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Beta Barrel / Mainly Beta
Similarity search - Domain/homology
Cholera enterotoxin subunit B
Similarity search - Component
Biological speciesVibrio cholerae (bacteria)
MethodX-RAY DIFFRACTION / Resolution: 2.3 Å
AuthorsMerritt, E.A. / Hol, W.G.J.
CitationJournal: Protein Sci. / Year: 1997
Title: Structural studies of receptor binding by cholera toxin mutants.
Authors: Merritt, E.A. / Sarfaty, S. / Jobling, M.G. / Chang, T. / Holmes, R.K. / Hirst, T.R. / Hol, W.G.
History
DepositionJun 3, 1997Processing site: BNL
Revision 1.0Oct 15, 1997Provider: repository / Type: Initial release
Revision 1.1Mar 24, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Database references / Derived calculations / Other / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_database_status / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / struct_asym / struct_conn / struct_ref_seq_dif / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_database_status.process_site / _pdbx_struct_assembly_gen.asym_id_list / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Nov 3, 2021Group: Database references / Structure summary / Category: chem_comp / database_2 / struct_ref_seq_dif
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details
Revision 2.2Aug 9, 2023Group: Refinement description / Category: pdbx_initial_refinement_model
Revision 2.3Oct 16, 2024Group: Data collection / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / pdbx_entry_details / pdbx_modification_feature
Item: _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
D: CHOLERA TOXIN
E: CHOLERA TOXIN
F: CHOLERA TOXIN
G: CHOLERA TOXIN
H: CHOLERA TOXIN
hetero molecules


Theoretical massNumber of molelcules
Total (without water)60,6508
Polymers58,6175
Non-polymers2,0333
Water2,720151
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area16840 Å2
ΔGint-13 kcal/mol
Surface area20860 Å2
MethodPISA
Unit cell
Length a, b, c (Å)103.400, 67.610, 101.700
Angle α, β, γ (deg.)90.00, 131.66, 90.00
Int Tables number5
Space group name H-MC121

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Components

#1: Protein
CHOLERA TOXIN


Mass: 11723.409 Da / Num. of mol.: 5 / Fragment: B-PENTAMER / Mutation: G33R
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Vibrio cholerae (bacteria) / Strain: OGAWA 41 (CLASSICAL BIOTYPE) / Production host: Escherichia coli (E. coli) / References: UniProt: P01556
#2: Polysaccharide beta-D-galactopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-galactopyranose-(1-4)-[N-acetyl-alpha- ...beta-D-galactopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-galactopyranose-(1-4)-[N-acetyl-alpha-neuraminic acid-(2-3)]beta-D-galactopyranose-(1-4)-beta-D-glucopyranose


Type: oligosaccharide / Mass: 998.885 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGalpb1-3DGalpNAcb1-4[DNeup5Aca2-3]DGalpb1-4DGlcpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/4,5,4/[a2122h-1b_1-5][a2112h-1b_1-5][Aad21122h-2a_2-6_5*NCC/3=O][a2112h-1b_1-5_2*NCC/3=O]/1-2-3-4-2/a4-b1_b3-c2_b4-d1_d3-e1WURCSPDB2Glycan 1.1.0
[][b-D-Glcp]{[(4+1)][b-D-Galp]{[(3+2)][a-D-Neup5Ac]{}[(4+1)][b-D-GalpNAc]{[(3+1)][b-D-Galp]{}}}}LINUCSPDB-CARE
#3: Chemical ChemComp-CL / CHLORIDE ION


Mass: 35.453 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Cl
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 151 / Source method: isolated from a natural source / Formula: H2O
Compound detailsEACH CHAIN CONTAINS AN INTRODUCED MUTATION GLY->ARG AT RESIDUE 33 OF THE RECEPTOR BINDING SITE.
Has protein modificationY

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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: 2.26 Å3/Da / Density % sol: 45.69 %
Crystal growDetails: PROTEIN, 20 MM TRIS, 1 MM GM1-OS, PH 7.5 200 MM MGCL2, 100 MM CACODYLATE, 19% PEG 1000, 0.2% AGAROSE, PH 7.2
PH range: 7.2-7.5
Crystal grow
*PLUS
pH: 7.5 / Method: vapor diffusion
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
12.5 mg/mlprotein1drop
210 mMTris1drop
30.5 mMGM11drop
4100 mM1dropMgCl2
550 mMcacodylate1drop
69.5 %PEG10001drop
70.1 %agarose1drop
8200 mM1reservoirMgCl2
9100 mMcacodylate1reservoir
1019 %PEG10001reservoir
110.2 %agarose1reservoir

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Data collection

DiffractionMean temperature: 287 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RUH2R / Wavelength: 1.5418
DetectorType: SIEMENS / Detector: AREA DETECTOR / Date: Dec 1, 1995
RadiationMonochromator: GRAPHITE(002) / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.3→15 Å / Num. obs: 22182 / % possible obs: 95 % / Rmerge(I) obs: 0.098
Reflection shellResolution: 2.3→2.38 Å / % possible all: 55
Reflection shell
*PLUS
% possible obs: 55 %

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Processing

Software
NameVersionClassification
XENGENdata collection
MACROdata reduction
X-PLOR3.1model building
X-PLOR3.1refinement
XENGENdata reduction
MACROdata scaling
X-PLOR3.1phasing
RefinementStarting model: PDB ENTRY 1CHP

1chp


Resolution: 2.3→15 Å / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 1 / Details: BABINET BULK SOLVENT MODEL KSOL = 0.8 BSOL = 50.0
RfactorNum. reflection% reflectionSelection details
Rfree0.25 -7 %RANDOM
Rwork0.182 ---
obs0.182 21343 92 %-
Displacement parametersBiso mean: 27 Å2
Baniso -1Baniso -2Baniso -3
1--0.203 Å20 Å24.2029 Å2
2---3.3302 Å20 Å2
3---3.5332 Å2
Refinement stepCycle: LAST / Resolution: 2.3→15 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4105 0 137 151 4393
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONx_bond_d0.011
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_deg1.57
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it22.3
X-RAY DIFFRACTIONx_mcangle_it44
X-RAY DIFFRACTIONx_scbond_it22.3
X-RAY DIFFRACTIONx_scangle_it44
LS refinement shellResolution: 2.3→2.33 Å / Total num. of bins used: 15
RfactorNum. reflection% reflection
Rfree0.262 21 6 %
Rwork0.2277 272 -
obs--55 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARHCSDX.PROTOPHCSDX.PRO
X-RAY DIFFRACTION2PARAM1.CHO (MODIFIED)TOPH1.CHO (MODIFIED)
Software
*PLUS
Name: X-PLOR / Version: 3.1 / Classification: refinement
Refinement
*PLUS
Rfactor Rfree: 0.25
Solvent computation
*PLUS
Displacement parameters
*PLUS
LS refinement shell
*PLUS
Rfactor Rfree: 0.262

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