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- PDB-1p8f: A four location model to explain the stereospecificity of proteins. -

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Basic information

Entry
Database: PDB / ID: 1p8f
TitleA four location model to explain the stereospecificity of proteins.
ComponentsIsocitrate dehydrogenase [NADP]
KeywordsOXIDOREDUCTASE / isocitrate dehydrogenase / d-isocitrate / enantiomer / stereospecificity / four-location / racemic / magnesium ion
Function / homology
Function and homology information


isocitrate dehydrogenase (NADP+) / isocitrate dehydrogenase (NADP+) activity / glyoxylate cycle / guanosine tetraphosphate binding / tricarboxylic acid cycle / electron transport chain / NAD binding / response to oxidative stress / magnesium ion binding / cytosol / cytoplasm
Similarity search - Function
Isocitrate dehydrogenase NADP-dependent, dimeric, prokaryotic / Isopropylmalate Dehydrogenase / Isopropylmalate Dehydrogenase / Isocitrate/isopropylmalate dehydrogenase, conserved site / Isocitrate and isopropylmalate dehydrogenases signature. / Isopropylmalate dehydrogenase-like domain / Isocitrate/isopropylmalate dehydrogenase / Isocitrate/isopropylmalate dehydrogenase / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
ISOCITRIC ACID / Isocitrate dehydrogenase [NADP]
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.85 Å
AuthorsMesecar, A.D. / Koshland Jr., D.E.
Citation
Journal: Nature / Year: 2000
Title: Structural biology: A new model for protein stereospecificity.
Authors: Mesecar, A.D. / Koshland Jr., D.E.
#1: Journal: IUBMB Life / Year: 2000
Title: Sites of binding and orientation in a four location model for protein stereospecificity.
History
DepositionMay 7, 2003Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 20, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 29, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Jan 31, 2018Group: Experimental preparation / Category: exptl_crystal_grow
Item: _exptl_crystal_grow.pdbx_details / _exptl_crystal_grow.temp
Revision 1.4Feb 14, 2024Group: Data collection / Database references / Derived calculations
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_struct_conn_angle / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr1_symmetry / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.ptnr3_symmetry / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _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.ptnr1_label_seq_id / _struct_conn.ptnr1_symmetry / _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_conn.ptnr2_label_seq_id / _struct_conn.ptnr2_symmetry / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Isocitrate dehydrogenase [NADP]
hetero molecules


Theoretical massNumber of molelcules
Total (without water)46,3987
Polymers45,8101
Non-polymers5896
Water4,324240
1
A: Isocitrate dehydrogenase [NADP]
hetero molecules

A: Isocitrate dehydrogenase [NADP]
hetero molecules


Theoretical massNumber of molelcules
Total (without water)92,79714
Polymers91,6192
Non-polymers1,17812
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation7_555y,x,-z1
Buried area9910 Å2
ΔGint-83 kcal/mol
Surface area30900 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)103.306, 103.306, 150.004
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number96
Space group name H-MP43212
DetailsE.coli isocitrate dehydrogenase is biologically active as a dimer. There is one monomer per assymetric unit.

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Components

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Protein , 1 types, 1 molecules A

#1: Protein Isocitrate dehydrogenase [NADP] / Oxalosuccinate decarboxylase / IDH / NADP+-specific ICDH / IDP


Mass: 45809.562 Da / Num. of mol.: 1 / Fragment: Full Length
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: ICD OR ICDA OR ICDE OR B1136 / Production host: Escherichia coli (E. coli) / Keywords: wild type
References: UniProt: P08200, isocitrate dehydrogenase (NADP+)

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Non-polymers , 5 types, 246 molecules

#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#4: Chemical ChemComp-ICT / ISOCITRIC ACID


Mass: 192.124 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H8O7
#5: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C3H8O3
#6: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 240 / 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: 4.37 Å3/Da / Density % sol: 71.83 %
Crystal growTemperature: 295 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: IDH, stored in metal-free final buffer, was diluted to 25, 30, 35 and 40 mg/ml using metal-free 2X buffer; (70mM Na2HPO4 , 18 mM citric acid, 200 mM NaCl, 0.4 mM DTT, pH 5.4). and was ...Details: IDH, stored in metal-free final buffer, was diluted to 25, 30, 35 and 40 mg/ml using metal-free 2X buffer; (70mM Na2HPO4 , 18 mM citric acid, 200 mM NaCl, 0.4 mM DTT, pH 5.4). and was crystallized from hanging drops using 5 l each of these IDH solutions and 5 l each of 34, 36, 38, 40, 42, and 44 % (NH4)2SO4 solutions in crystallization buffer (35mM Na2HPO4 , 9 mM citric acid, 100 mM NaCl, 0.2 mM DTT at pH 6.1, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 22K
Crystal grow
*PLUS
Method: unknown

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ALS / Beamline: 5.0.2 / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Feb 5, 1999
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.85→25 Å / Num. all: 69674 / Num. obs: 69674 / Observed criterion σ(F): 1 / Observed criterion σ(I): 2 / Redundancy: 14 % / Biso Wilson estimate: 16.6 Å2 / Rmerge(I) obs: 0.073 / Net I/σ(I): 20.7
Reflection shellResolution: 1.85→1.92 Å / Rmerge(I) obs: 0.473 / Mean I/σ(I) obs: 3.2 / % possible all: 98.6

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Processing

Software
NameVersionClassification
CNS1refinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.85→24.86 Å / Rfactor Rfree error: 0.003 / Data cutoff high absF: 295038.84 / 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
Rfree0.225 6755 10.1 %RANDOM
Rwork0.192 ---
obs0.192 66647 95.5 %-
all-69231 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 84.4936 Å2 / ksol: 0.414248 e/Å3
Displacement parametersBiso mean: 25.3 Å2
Baniso -1Baniso -2Baniso -3
1-1.85 Å20 Å20 Å2
2--1.85 Å20 Å2
3----3.7 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.24 Å0.21 Å
Luzzati d res low-5 Å
Luzzati sigma a0.21 Å0.22 Å
Refinement stepCycle: LAST / Resolution: 1.85→24.86 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3213 0 37 240 3490
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.014
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_deg1.6
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d25.1
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d1.02
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.681.5
X-RAY DIFFRACTIONc_mcangle_it2.562
X-RAY DIFFRACTIONc_scbond_it3.042
X-RAY DIFFRACTIONc_scangle_it4.622.5
LS refinement shellResolution: 1.85→1.92 Å / Rfactor Rfree error: 0.011 / Total num. of bins used: 10
RfactorNum. reflection% reflection
Rfree0.271 589 10 %
Rwork0.282 5328 -
obs--86.2 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER.PARAMWATER.TOP
X-RAY DIFFRACTION3ION.PARAMION.TOP
X-RAY DIFFRACTION4ALL.PARALL.TOP
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg25.1
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg1.02

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