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- PDB-1d6i: CHALCONE SYNTHASE (H303Q MUTANT) -

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Basic information

Entry
Database: PDB / ID: 1d6i
TitleCHALCONE SYNTHASE (H303Q MUTANT)
ComponentsCHALCONE SYNTHASE
KeywordsTRANSFERASE / POLYPETIDE SYNTHASE / FLAVONOID BIOSYNTHESIS / MALONYL-COA DECARBOXYLATION / SITE-DIRECTED MUTANT
Function / homology
Function and homology information


chalcone biosynthetic process / chalcone synthase / naringenin-chalcone synthase activity / flavonoid biosynthetic process / polyketide biosynthetic process
Similarity search - Function
Chalcone/stilbene synthase, active site / Chalcone and stilbene synthases active site. / Chalcone/stilbene synthase, N-terminal / Chalcone and stilbene synthases, N-terminal domain / Polyketide synthase, type III / Chalcone/stilbene synthase, C-terminal / Chalcone and stilbene synthases, C-terminal domain / Thiolase/Chalcone synthase / Peroxisomal Thiolase; Chain A, domain 1 / Thiolase-like ...Chalcone/stilbene synthase, active site / Chalcone and stilbene synthases active site. / Chalcone/stilbene synthase, N-terminal / Chalcone and stilbene synthases, N-terminal domain / Polyketide synthase, type III / Chalcone/stilbene synthase, C-terminal / Chalcone and stilbene synthases, C-terminal domain / Thiolase/Chalcone synthase / Peroxisomal Thiolase; Chain A, domain 1 / Thiolase-like / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Biological speciesMedicago sativa (alfalfa)
MethodX-RAY DIFFRACTION / Resolution: 2 Å
AuthorsJez, J.M. / Ferrer, J.L. / Bowman, M.E. / Dixon, R.A. / Noel, J.P.
CitationJournal: Biochemistry / Year: 2000
Title: Dissection of malonyl-coenzyme A decarboxylation from polyketide formation in the reaction mechanism of a plant polyketide synthase.
Authors: Jez, J.M. / Ferrer, J.L. / Bowman, M.E. / Dixon, R.A. / Noel, J.P.
History
DepositionOct 13, 1999Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 3, 2000Provider: repository / Type: Initial release
Revision 1.1Apr 27, 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.temp
Revision 1.4Nov 3, 2021Group: Database references / Derived calculations
Category: database_2 / struct_conn ...database_2 / struct_conn / 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 / _struct_conn.pdbx_leaving_atom_flag / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.5Oct 30, 2024Group: Data collection / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: CHALCONE SYNTHASE
B: CHALCONE SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)85,4844
Polymers85,2922
Non-polymers1922
Water5,873326
1
A: CHALCONE SYNTHASE
B: CHALCONE SYNTHASE
hetero molecules

A: CHALCONE SYNTHASE
B: CHALCONE SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)170,9698
Polymers170,5844
Non-polymers3844
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_555-y,x-y,z+1/31
2
A: CHALCONE SYNTHASE
hetero molecules

B: CHALCONE SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)85,4844
Polymers85,2922
Non-polymers1922
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation3_554-x+y,-x,z-1/31
Buried area6480 Å2
ΔGint-34 kcal/mol
Surface area26610 Å2
MethodPISA
Unit cell
Length a, b, c (Å)97.856, 97.856, 129.601
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number152
Space group name H-MP3121

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Components

#1: Protein CHALCONE SYNTHASE


Mass: 42646.070 Da / Num. of mol.: 2 / Fragment: CHS / Mutation: H303Q
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Medicago sativa (alfalfa) / Production host: Escherichia coli (E. coli) / References: UniProt: P30074, chalcone synthase
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: SO4
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 326 / Source method: isolated from a natural source / Formula: H2O
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: 2.1 Å3/Da / Density % sol: 41.41 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: 2.2-2.4 M AMMONIUM SULFATE, 0.1 M BIS-TRIS PROPANE, 2 MM DITHIOTHREITOL (DTT), pH 6.5, VAPOR DIFFUSION, HANGING DROP
Crystal grow
*PLUS
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
12.2-2.4 Mammonium sulfate1reservoir
20.1 Mbis-Tris-propane1reservoir
32 mMdithiothreitol1reservoir

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Data collection

DiffractionMean temperature: 105 K
Diffraction sourceSource: ROTATING ANODE / Type: MACSCIENCE / Wavelength: 1.5418
DetectorType: MACSCIENCE / Detector: IMAGE PLATE / Date: Mar 11, 1999
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2→71 Å / Num. all: 49071 / Num. obs: 45654 / % possible obs: 93 % / Redundancy: 3.69 % / Biso Wilson estimate: 23.79 Å2 / Rmerge(I) obs: 0.068 / Net I/σ(I): 6.3
Reflection shellResolution: 2→2.05 Å / Redundancy: 2.71 % / Rmerge(I) obs: 0.39 / % possible all: 87.8
Reflection
*PLUS
Num. measured all: 168254
Reflection shell
*PLUS
% possible obs: 87.8 % / Rmerge(I) obs: 0.39 / Mean I/σ(I) obs: 1.7

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Processing

Software
NameClassification
CCP4model building
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
CCP4phasing
RefinementResolution: 2→71 Å / Stereochemistry target values: ENGH & HUBER
RfactorNum. reflection% reflectionSelection details
Rfree0.26861 2309 -RANDOM
Rwork0.19632 ---
all0.19685 49071 --
obs-45654 93 %-
Refinement stepCycle: LAST / Resolution: 2→71 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5976 0 10 326 6312
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONp_bond_d
X-RAY DIFFRACTIONp_angle_d
X-RAY DIFFRACTIONp_angle_deg3.1
X-RAY DIFFRACTIONp_planar_d
X-RAY DIFFRACTIONp_hb_or_metal_coord
X-RAY DIFFRACTIONp_mcbond_it
X-RAY DIFFRACTIONp_mcangle_it
X-RAY DIFFRACTIONp_scbond_it
X-RAY DIFFRACTIONp_scangle_it
X-RAY DIFFRACTIONp_plane_restr
X-RAY DIFFRACTIONp_chiral_restr
X-RAY DIFFRACTIONp_singtor_nbd
X-RAY DIFFRACTIONp_multtor_nbd
X-RAY DIFFRACTIONp_xhyhbond_nbd
X-RAY DIFFRACTIONp_xyhbond_nbd
X-RAY DIFFRACTIONp_planar_tor
X-RAY DIFFRACTIONp_staggered_tor
X-RAY DIFFRACTIONp_orthonormal_tor
X-RAY DIFFRACTIONp_transverse_tor
X-RAY DIFFRACTIONp_special_tor
Software
*PLUS
Name: REFMAC / Classification: refinement
Refinement
*PLUS
Highest resolution: 2 Å / % reflection Rfree: 5 %
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Type: p_bond_d / Dev ideal: 0.015

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