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- PDB-1i48: CYSTATHIONINE GAMMA-SYNTHASE IN COMPLEX WITH THE INHIBITOR CTCPO -

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Basic information

Entry
Database: PDB / ID: 1i48
TitleCYSTATHIONINE GAMMA-SYNTHASE IN COMPLEX WITH THE INHIBITOR CTCPO
ComponentsCYSTATHIONINE GAMMA-SYNTHASE
KeywordsLYASE / PLP-dependent enzyme / homotetramer / inhibitor complex / CTCPO
Function / homology
Function and homology information


cystathionine gamma-synthase activity / methionine biosynthetic process / transsulfuration / chloroplast / pyridoxal phosphate binding
Similarity search - Function
Cystathionine gamma-synthase 1/2 / Cys/Met metabolism enzymes pyridoxal-phosphate attachment site. / Cys/Met metabolism, pyridoxal phosphate-dependent enzyme / Cys/Met metabolism PLP-dependent enzyme / Aspartate Aminotransferase, domain 1 / Aspartate Aminotransferase, domain 1 / Aspartate Aminotransferase; domain 2 / Type I PLP-dependent aspartate aminotransferase-like (Major domain) / Pyridoxal phosphate-dependent transferase, small domain / Pyridoxal phosphate-dependent transferase, major domain ...Cystathionine gamma-synthase 1/2 / Cys/Met metabolism enzymes pyridoxal-phosphate attachment site. / Cys/Met metabolism, pyridoxal phosphate-dependent enzyme / Cys/Met metabolism PLP-dependent enzyme / Aspartate Aminotransferase, domain 1 / Aspartate Aminotransferase, domain 1 / Aspartate Aminotransferase; domain 2 / Type I PLP-dependent aspartate aminotransferase-like (Major domain) / Pyridoxal phosphate-dependent transferase, small domain / Pyridoxal phosphate-dependent transferase, major domain / Pyridoxal phosphate-dependent transferase / Alpha-Beta Complex / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Chem-CCO / PYRIDOXAL-5'-PHOSPHATE / Cystathionine gamma-synthase
Similarity search - Component
Biological speciesNicotiana tabacum (common tobacco)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 3.25 Å
AuthorsSteegborn, C. / Laber, B. / Messerschmidt, A. / Huber, R. / Clausen, T.
CitationJournal: J.Mol.Biol. / Year: 2001
Title: Crystal structures of cystathionine gamma-synthase inhibitor complexes rationalize the increased affinity of a novel inhibitor.
Authors: Steegborn, C. / Laber, B. / Messerschmidt, A. / Huber, R. / Clausen, T.
History
DepositionFeb 20, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 5, 2001Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Non-polymer description / Version format compliance
Revision 1.3Aug 9, 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 / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _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.ptnr1_label_seq_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_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

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Assembly

Deposited unit
A: CYSTATHIONINE GAMMA-SYNTHASE
B: CYSTATHIONINE GAMMA-SYNTHASE
C: CYSTATHIONINE GAMMA-SYNTHASE
D: CYSTATHIONINE GAMMA-SYNTHASE
E: CYSTATHIONINE GAMMA-SYNTHASE
F: CYSTATHIONINE GAMMA-SYNTHASE
G: CYSTATHIONINE GAMMA-SYNTHASE
H: CYSTATHIONINE GAMMA-SYNTHASE
I: CYSTATHIONINE GAMMA-SYNTHASE
J: CYSTATHIONINE GAMMA-SYNTHASE
K: CYSTATHIONINE GAMMA-SYNTHASE
L: CYSTATHIONINE GAMMA-SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)583,03036
Polymers576,81612
Non-polymers6,21424
Water00
1
A: CYSTATHIONINE GAMMA-SYNTHASE
B: CYSTATHIONINE GAMMA-SYNTHASE
C: CYSTATHIONINE GAMMA-SYNTHASE
D: CYSTATHIONINE GAMMA-SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)194,34312
Polymers192,2724
Non-polymers2,0718
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area25290 Å2
ΔGint-150 kcal/mol
Surface area46230 Å2
MethodPISA
2
E: CYSTATHIONINE GAMMA-SYNTHASE
F: CYSTATHIONINE GAMMA-SYNTHASE
G: CYSTATHIONINE GAMMA-SYNTHASE
H: CYSTATHIONINE GAMMA-SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)194,34312
Polymers192,2724
Non-polymers2,0718
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area25250 Å2
ΔGint-150 kcal/mol
Surface area46220 Å2
MethodPISA
3
I: CYSTATHIONINE GAMMA-SYNTHASE
J: CYSTATHIONINE GAMMA-SYNTHASE
K: CYSTATHIONINE GAMMA-SYNTHASE
L: CYSTATHIONINE GAMMA-SYNTHASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)194,34312
Polymers192,2724
Non-polymers2,0718
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area25230 Å2
ΔGint-150 kcal/mol
Surface area46320 Å2
MethodPISA
Unit cell
Length a, b, c (Å)312.400, 165.600, 162.200
Angle α, β, γ (deg.)90.00, 89.80, 90.00
Int Tables number5
Space group name H-MC121

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Components

#1: Protein
CYSTATHIONINE GAMMA-SYNTHASE


Mass: 48067.973 Da / Num. of mol.: 12
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Nicotiana tabacum (common tobacco) / Gene: METB / Plasmid: PENCN1117 / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: Q9ZPL5, EC: 4.2.99.9
#2: Chemical
ChemComp-PLP / PYRIDOXAL-5'-PHOSPHATE / VITAMIN B6 Phosphate


Mass: 247.142 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C8H10NO6P
#3: Chemical
ChemComp-CCO / CARBOXYMETHYLTHIO-3-(3-CHLOROPHENYL)-1,2,4-OXADIAZOL


Mass: 270.692 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C10H7ClN2O3S

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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: 3.64 Å3/Da / Density % sol: 66.17 %
Crystal growTemperature: 291 K / Method: vapor diffusion / pH: 6.5
Details: MES, magnesium acetate, PEG 8000, pH 6.5, VAPOR DIFFUSION, temperature 291K
Crystal grow
*PLUS
pH: 7.8 / Method: vapor diffusion, sitting drop / Details: used seeding
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
1100 mMMES-NaOH1reservoir
2200 mMmagnesium acetate1reservoir
310 %(w/v)PEG80001reservoir
410 mMTris-HCl1drop
50.010 mMPLP1drop

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Data collection

DiffractionMean temperature: 291 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418 Å
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Jul 10, 1999
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 3.25→20 Å / Num. all: 119179 / Num. obs: 119179 / % possible obs: 93 % / Observed criterion σ(I): -100 / Redundancy: 1.7 % / Rmerge(I) obs: 0.138 / Net I/σ(I): 4.4
Reflection shellResolution: 3.25→3.36 Å / Redundancy: 1.6 % / Rmerge(I) obs: 0.496 / % possible all: 94
Reflection
*PLUS
% possible obs: 93 %
Reflection shell
*PLUS
% possible obs: 94 %

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Processing

Software
NameClassification
MOLREPphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry 1qgn

1qgn


Resolution: 3.25→20 Å / Isotropic thermal model: Isotropic / Cross valid method: THROUGHOUT / σ(F): 2 / Stereochemistry target values: Engh & Huber
RfactorNum. reflectionSelection details
Rfree0.257 5978 RANDOM
Rwork0.226 --
all-119179 -
obs-118526 -
Refinement stepCycle: LAST / Resolution: 3.25→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms36276 0 384 0 36660
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.005
X-RAY DIFFRACTIONx_angle_deg0.8
Software
*PLUS
Name: X-PLOR / Classification: refinement
Refinement
*PLUS
Lowest resolution: 20 Å / σ(F): 2 / Rfactor obs: 0.226
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_angle_deg0.8
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg24.8
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg0.5

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