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- PDB-1jsc: Crystal Structure of the Catalytic Subunit of Yeast Acetohydroxya... -

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Basic information

Entry
Database: PDB / ID: 1jsc
TitleCrystal Structure of the Catalytic Subunit of Yeast Acetohydroxyacid Synthase: A target for Herbicidal Inhibitors
ComponentsACETOHYDROXY-ACID SYNTHASE
KeywordsLYASE / ACETOHYDROXYACID SYNTHASE / ACETOLACTATE SYNTHASE / FAD / THIAMIN DIPHOSPHATE / HERBICIDE INHIBITION
Function / homology
Function and homology information


acetolactate synthase / acetolactate synthase complex / branched-chain amino acid biosynthetic process / acetolactate synthase activity / valine biosynthetic process / isoleucine biosynthetic process / thiamine pyrophosphate binding / amino acid biosynthetic process / flavin adenine dinucleotide binding / magnesium ion binding / mitochondrion
Similarity search - Function
Acetolactate synthase, large subunit, biosynthetic / Acetolactate synthase large subunit, TPP binding domain / Thiamine pyrophosphate enzyme / TPP-binding enzyme, conserved site / Thiamine pyrophosphate enzymes signature. / Thiamine pyrophosphate enzyme, central domain / Thiamine pyrophosphate enzyme, central domain / Thiamine pyrophosphate enzyme, N-terminal TPP-binding domain / Thiamine pyrophosphate enzyme, N-terminal TPP binding domain / Thiamine pyrophosphate enzyme, C-terminal TPP-binding ...Acetolactate synthase, large subunit, biosynthetic / Acetolactate synthase large subunit, TPP binding domain / Thiamine pyrophosphate enzyme / TPP-binding enzyme, conserved site / Thiamine pyrophosphate enzymes signature. / Thiamine pyrophosphate enzyme, central domain / Thiamine pyrophosphate enzyme, central domain / Thiamine pyrophosphate enzyme, N-terminal TPP-binding domain / Thiamine pyrophosphate enzyme, N-terminal TPP binding domain / Thiamine pyrophosphate enzyme, C-terminal TPP-binding / Thiamine pyrophosphate enzyme, C-terminal TPP binding domain / Thiamin diphosphate (ThDP)-binding fold, Pyr/PP domains / TPP-binding domain / Thiamin diphosphate-binding fold / DHS-like NAD/FAD-binding domain superfamily / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
DIHYDROGENPHOSPHATE ION / FLAVIN-ADENINE DINUCLEOTIDE / : / THIAMINE DIPHOSPHATE / Acetolactate synthase catalytic subunit, mitochondrial
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.6 Å
AuthorsPang, S.S. / Duggleby, R.G. / Guddat, L.W.
CitationJournal: J.Mol.Biol. / Year: 2002
Title: Crystal structure of yeast acetohydroxyacid synthase: a target for herbicidal inhibitors.
Authors: Pang, S.S. / Duggleby, R.G. / Guddat, L.W.
History
DepositionAug 17, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 16, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Aug 16, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / 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.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.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.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_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: ACETOHYDROXY-ACID SYNTHASE
B: ACETOHYDROXY-ACID SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)139,74513
Polymers136,9062
Non-polymers2,83911
Water5,855325
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area10760 Å2
ΔGint-80 kcal/mol
Surface area39330 Å2
MethodPISA
Unit cell
Length a, b, c (Å)95.552, 109.401, 178.858
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

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Protein , 1 types, 2 molecules AB

#1: Protein ACETOHYDROXY-ACID SYNTHASE / ACETOLACTATE SYNTHASE


Mass: 68453.000 Da / Num. of mol.: 2 / Fragment: MATURE CATALYTIC SUBUNIT
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae (brewer's yeast)
Gene: ILV2 / Plasmid: pET30C / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: P07342, EC: 4.1.3.18

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Non-polymers , 6 types, 336 molecules

#2: Chemical ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: K
#3: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#4: Chemical ChemComp-2HP / DIHYDROGENPHOSPHATE ION


Mass: 96.987 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: H2O4P
#5: Chemical ChemComp-TPP / THIAMINE DIPHOSPHATE


Mass: 425.314 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C12H19N4O7P2S
#6: Chemical ChemComp-FAD / FLAVIN-ADENINE DINUCLEOTIDE


Mass: 785.550 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H33N9O15P2 / Comment: FAD*YM
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 325 / 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: 3.62 Å3/Da / Density % sol: 66.1 %
Crystal growTemperature: 291 K / Method: vapor diffusion, hanging drop / pH: 5.8
Details: PEG 4000, potassium phosphate, thiamin diphosphate, FAD, magnesium chloride, DTT, ammonium acetate, pH 5.8, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal grow
*PLUS
Temperature: 293 K / Details: Pang, S.S., (2001) Acta Crystallogr, D57, 1321.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formulaDetails
11 mMThDP1drop
21 mM1dropMgCl2
31 mMFAD1drop
45 mMdithiothreitol1drop
514 %PEG40001reservoir
60.25-0.3 Mpotassium phosphate1reservoirpH5.8
70.2 Mammonium acetate1reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 14-BM-C / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Dec 17, 2000 / Details: mirrors
RadiationMonochromator: Ge(III) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.6→50 Å / Num. all: 214515 / Num. obs: 214515 / % possible obs: 97.8 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.7 % / Rmerge(I) obs: 0.058 / Net I/σ(I): 17.1
Reflection shellResolution: 2.6→2.69 Å / Redundancy: 3.6 % / Rmerge(I) obs: 0.301 / Mean I/σ(I) obs: 3.9 / Num. unique all: 5733 / % possible all: 99.2
Reflection
*PLUS
Num. obs: 57490 / Num. measured all: 214515 / Rmerge(I) obs: 0.058
Reflection shell
*PLUS
% possible obs: 99.2 % / Num. unique obs: 5733 / Num. measured obs: 20596 / Rmerge(I) obs: 0.301

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Processing

Software
NameClassification
AMoREphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1BFD

1bfd


Resolution: 2.6→100 Å / Isotropic thermal model: anisotropic / Cross valid method: R free throughout / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.219 5574 9.5 %RANDOM
Rwork0.188 ---
all0.191 54927 --
obs0.191 54927 94.1 %-
Solvent computationSolvent model: Jiang et al. / Bsol: -1 Å2 / ksol: -1 e/Å3
Displacement parameters
Baniso -1Baniso -2Baniso -3
1-1.245 Å20 Å20 Å2
2---8.228 Å20 Å2
3---6.983 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.33 Å0.29 Å
Luzzati d res low-5 Å
Luzzati sigma a0.35 Å0.3 Å
Refinement stepCycle: LAST / Resolution: 2.6→100 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms8126 0 177 325 8628
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_angle_deg1.274
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_dihedral_angle_d22.45
X-RAY DIFFRACTIONc_improper_angle_d0.794
LS refinement shellResolution: 2.6→2.7 Å / Rfactor Rfree error: 0
RfactorNum. reflection% reflection
Rfree0.267 496 9.62 %
Rwork0.247 4664 -
obs-4664 90 %
Refinement
*PLUS
Highest resolution: 2.6 Å / Lowest resolution: 50 Å / Rfactor all: 0.191 / Rfactor obs: 0.188 / Rfactor Rfree: 0.219 / Rfactor Rwork: 0.188
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.0064
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg22.45
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.794
LS refinement shell
*PLUS
Highest resolution: 2.6 Å / Lowest resolution: 2.69 Å / Rfactor Rfree: 0.267 / Rfactor Rwork: 0.247

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