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- PDB-1z8n: Crystal structure of Arabidopsis thaliana Acetohydroxyacid syntha... -

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Basic information

Entry
Database: PDB / ID: 1z8n
TitleCrystal structure of Arabidopsis thaliana Acetohydroxyacid synthase In Complex With An Imidazolinone Herbicide, Imazaquin
ComponentsAcetolactate synthase
KeywordsTRANSFERASE / Acetohydroxyacid synthase / acetolactate synthase / herbicide / imidazolinone / thiamin diphosphate / FAD / inhibitor / cysteine-s-dioxide / CHES
Function / homology
Function and homology information


acetolactate synthase / acetolactate synthase complex / acetolactate synthase activity / valine biosynthetic process / isoleucine biosynthetic process / response to herbicide / thiamine pyrophosphate binding / chloroplast stroma / amino acid biosynthetic process / chloroplast ...acetolactate synthase / acetolactate synthase complex / acetolactate synthase activity / valine biosynthetic process / isoleucine biosynthetic process / response to herbicide / thiamine pyrophosphate binding / chloroplast stroma / amino acid biosynthetic process / chloroplast / 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
Chem-1IQ / FLAVIN-ADENINE DINUCLEOTIDE / THIAMINE DIPHOSPHATE / Acetolactate synthase, chloroplastic
Similarity search - Component
Biological speciesArabidopsis thaliana (thale cress)
MethodX-RAY DIFFRACTION / SYNCHROTRON / FOURIER SYNTHESIS / Resolution: 2.8 Å
AuthorsMcCourt, J.A. / Pang, S.S. / King-Scott, J. / Guddat, L.W. / Duggleby, R.G.
CitationJournal: Proc.Natl.Acad.Sci.Usa / Year: 2006
Title: Herbicide-binding sites revealed in the structure of plant acetohydroxyacid synthase
Authors: McCourt, J.A. / Pang, S.S. / King-Scott, J. / Guddat, L.W. / Duggleby, R.G.
History
DepositionMar 31, 2005Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Jan 17, 2006Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Oct 25, 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_conn_type / struct_ref_seq_dif / 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.conn_type_id / _struct_conn.id / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _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_conn_type.id / _struct_ref_seq_dif.details / _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

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Assembly

Deposited unit
A: Acetolactate synthase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)66,6577
Polymers64,5921
Non-polymers2,0656
Water5,170287
1
A: Acetolactate synthase
hetero molecules

A: Acetolactate synthase
hetero molecules

A: Acetolactate synthase
hetero molecules

A: Acetolactate synthase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)266,62728
Polymers258,3674
Non-polymers8,26124
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation4_665-x+1,-y+1,z1
crystal symmetry operation7_555y,x,-z+1/31
crystal symmetry operation10_665-y+1,-x+1,-z+1/31
2
A: Acetolactate synthase
hetero molecules

A: Acetolactate synthase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)133,31414
Polymers129,1832
Non-polymers4,13012
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation10_665-y+1,-x+1,-z+1/31
Buried area14500 Å2
ΔGint-81 kcal/mol
Surface area37290 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)179.081, 179.081, 186.077
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number181
Space group name H-MP6422
Components on special symmetry positions
IDModelComponents
11A-4052-

HOH

21A-4220-

HOH

DetailsThe biological unit is a tetramer

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Components

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Protein , 1 types, 1 molecules A

#1: Protein Acetolactate synthase / Acetohydroxy-acid synthase / ALS


Mass: 64591.664 Da / Num. of mol.: 1 / Fragment: residues 86-667
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Arabidopsis thaliana (thale cress) / Gene: ILVB / Plasmid: pET30a(+) / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: P17597, acetolactate synthase

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Non-polymers , 6 types, 293 molecules

#2: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Mg
#3: Chemical ChemComp-1IQ / 2-(4-ISOPROPYL-4-METHYL-5-OXO-4,5-DIHYDRO-1H-IMIDAZOL-2-YL)QUINOLINE-3-CARBOXYLIC ACID / IMAZAQUIN


Mass: 311.335 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C17H17N3O3
#4: Chemical ChemComp-NHE / 2-[N-CYCLOHEXYLAMINO]ETHANE SULFONIC ACID / N-CYCLOHEXYLTAURINE / CHES


Mass: 207.290 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H17NO3S / Comment: pH buffer*YM
#5: Chemical ChemComp-FAD / FLAVIN-ADENINE DINUCLEOTIDE


Mass: 785.550 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C27H33N9O15P2 / Comment: FAD*YM
#6: Chemical ChemComp-TPP / THIAMINE DIPHOSPHATE


Mass: 425.314 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C12H19N4O7P2S
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 287 / 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: 6.6 Å3/Da / Density % sol: 81 %
Crystal growTemperature: 290 K / Method: vapor diffusion, hanging drop / pH: 9
Details: Tris, FAD, DTT, ThDP, magnesium chloride, imazaquin, CHES, lithium sufate, potassium sodium tartrate , pH 9.0, VAPOR DIFFUSION, HANGING DROP, temperature 290K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 14-BM-D / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Dec 12, 2003 / 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: 2.8→50 Å / Num. all: 40076 / Num. obs: 40076 / % possible obs: 90.8 % / Observed criterion σ(F): -3 / Observed criterion σ(I): 0 / Redundancy: 5.7 % / Rmerge(I) obs: 0.06 / Net I/σ(I): 23
Reflection shellResolution: 2.8→2.9 Å / Redundancy: 3 % / Mean I/σ(I) obs: 3.26 / Num. unique all: 2424 / % possible all: 56

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Processing

Software
NameClassification
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: 1YBH

1ybh


Resolution: 2.8→50 Å / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.2157 3486 10 %random
Rwork0.1987 ---
all0.2004 40076 --
obs0.2004 36946 84.3 %-
Refine analyze
FreeObs
Luzzati coordinate error0.3916 Å0.3706 Å
Luzzati d res low-5 Å
Luzzati sigma a0.5455 Å0.4767 Å
Refinement stepCycle: LAST / Resolution: 2.8→50 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4430 0 139 287 4856
LS refinement shellResolution: 2.8→2.9 Å / Rfactor Rfree error: 0
RfactorNum. reflection% reflection
Rfree0 0 -
Rwork0.481 --
obs-1983 57 %

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