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- PDB-1toe: Unliganded structure of Hexamutant + A293D mutant of E. coli aspa... -

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Basic information

Entry
Database: PDB / ID: 1toe
TitleUnliganded structure of Hexamutant + A293D mutant of E. coli aspartate aminotransferase
ComponentsAspartate aminotransferase
KeywordsTRANSFERASE / aspartate aminotransferase hexamutant
Function / homology
Function and homology information


L-phenylalanine biosynthetic process from chorismate via phenylpyruvate / L-tyrosine-2-oxoglutarate transaminase activity / L-phenylalanine biosynthetic process / aspartate transaminase / L-aspartate:2-oxoglutarate aminotransferase activity / pyridoxal phosphate binding / protein homodimerization activity / identical protein binding / cytosol / cytoplasm
Similarity search - Function
Aspartate/other aminotransferase / Aminotransferases, class-I, pyridoxal-phosphate-binding site / Aminotransferases class-I pyridoxal-phosphate attachment site. / Aminotransferase, class I/classII / Aminotransferase class I and II / 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 ...Aspartate/other aminotransferase / Aminotransferases, class-I, pyridoxal-phosphate-binding site / Aminotransferases class-I pyridoxal-phosphate attachment site. / Aminotransferase, class I/classII / Aminotransferase class I and II / 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
Aspartate aminotransferase
Similarity search - Component
Biological speciesEscherichia coli (E. coli)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2 Å
AuthorsChow, M.A. / McElroy, K.E. / Corbett, K.D. / Berger, J.M. / Kirsch, J.F.
CitationJournal: Biochemistry / Year: 2004
Title: Narrowing substrate specificity in a directly evolved enzyme: the A293D mutant of aspartate aminotransferase
Authors: Chow, M.A. / McElroy, K.E. / Corbett, K.D. / Berger, J.M. / Kirsch, J.F.
History
DepositionJun 14, 2004Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 5, 2004Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Advisory / Derived calculations / Version format compliance
Revision 1.3Oct 27, 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 1.4Aug 23, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 1.5Nov 15, 2023Group: Data collection / Category: chem_comp_atom / chem_comp_bond / Item: _chem_comp_atom.atom_id / _chem_comp_bond.atom_id_2

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Aspartate aminotransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)44,0052
Polymers43,9091
Non-polymers961
Water3,135174
1
A: Aspartate aminotransferase
hetero molecules

A: Aspartate aminotransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)88,0114
Polymers87,8192
Non-polymers1922
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation3_755-x+2,y,-z+1/21
Buried area6790 Å2
ΔGint-67 kcal/mol
Surface area29470 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)85.713, 152.865, 79.117
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number20
Space group name H-MC2221
DetailsThe biological assembly is a dimer, the second part of which is generated by the two-fold axis: -x+2, -z+1/2

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Components

#1: Protein Aspartate aminotransferase / Transaminase A / ASPAT


Mass: 43909.418 Da / Num. of mol.: 1 / Mutation: V39L,K41Y,T47I,N69L,T109S,A293D,N297S
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Escherichia coli (E. coli) / Gene: ASPC, B0928 / Plasmid: pJO2 / Production host: Escherichia coli (E. coli) / Strain (production host): MG204 / References: UniProt: P00509, aspartate transaminase
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 174 / 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: 2.97 Å3/Da / Density % sol: 59 %
Crystal growTemperature: 294 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: potassium phosphate, PLP, EDTA, DTT, PEG 400, N-methylmorpholine, ammonium sulfate, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 294K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ALS / Beamline: 8.3.1 / Wavelength: 1.12 Å
DetectorType: ADSC QUANTUM 210 / Detector: CCD / Date: Oct 16, 2003
RadiationMonochromator: Double Crystal Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.12 Å / Relative weight: 1
ReflectionResolution: 2→50 Å / Num. all: 35904 / Num. obs: 35904 / % possible obs: 99 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 4.4 % / Rsym value: 0.055 / Net I/σ(I): 23.5
Reflection shellResolution: 2→2.06 Å / Redundancy: 2.9 % / Mean I/σ(I) obs: 2 / Num. unique all: 3259 / Rsym value: 0.338 / % possible all: 91.7

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Processing

Software
NameVersionClassification
REFMAC5.2.0003refinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1AHE

1ahe


Resolution: 2→30 Å / Cor.coef. Fo:Fc: 0.961 / Cor.coef. Fo:Fc free: 0.952 / SU B: 6.472 / SU ML: 0.091 / TLS residual ADP flag: LIKELY RESIDUAL / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.145 / ESU R Free: 0.129 / Stereochemistry target values: MAXIMUM LIKELIHOOD
RfactorNum. reflection% reflectionSelection details
Rfree0.20213 1767 5 %RANDOM
Rwork0.17783 ---
all0.17906 33481 --
obs0.17906 33481 99.34 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: BABINET MODEL WITH MASK
Displacement parametersBiso mean: 33.8 Å2
Baniso -1Baniso -2Baniso -3
1-0.96 Å20 Å20 Å2
2---2.55 Å20 Å2
3---1.59 Å2
Refinement stepCycle: LAST / Resolution: 2→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3089 0 5 174 3268
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0110.0223150
X-RAY DIFFRACTIONr_bond_other_d
X-RAY DIFFRACTIONr_angle_refined_deg1.3091.9494262
X-RAY DIFFRACTIONr_angle_other_deg
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.3335389
X-RAY DIFFRACTIONr_dihedral_angle_2_deg31.40724.2150
X-RAY DIFFRACTIONr_dihedral_angle_3_deg19.42415518
X-RAY DIFFRACTIONr_dihedral_angle_4_deg24.131522
X-RAY DIFFRACTIONr_chiral_restr0.1080.2469
X-RAY DIFFRACTIONr_gen_planes_refined0.0060.022402
X-RAY DIFFRACTIONr_gen_planes_other
X-RAY DIFFRACTIONr_nbd_refined0.2580.21439
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined0.3130.22139
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined0.1430.2189
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined0.1760.276
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined0.1550.214
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_mcbond_it0.751.52013
X-RAY DIFFRACTIONr_mcbond_other
X-RAY DIFFRACTIONr_mcangle_it1.21623122
X-RAY DIFFRACTIONr_scbond_it2.331296
X-RAY DIFFRACTIONr_scangle_it3.4874.51140
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 2→2.052 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.251 131 -
Rwork0.234 2270 -
obs-2401 93.21 %
Refinement TLS params.

Method: refined / Refine-ID: X-RAY DIFFRACTION

IDL11 (°2)L12 (°2)L13 (°2)L22 (°2)L23 (°2)L33 (°2)S11 (Å °)S12 (Å °)S13 (Å °)S21 (Å °)S22 (Å °)S23 (Å °)S31 (Å °)S32 (Å °)S33 (Å °)T11 (Å2)T12 (Å2)T13 (Å2)T22 (Å2)T23 (Å2)T33 (Å2)Origin x (Å)Origin y (Å)Origin z (Å)
10.7506-0.2424-0.03611.75030.00710.87260.0133-0.1596-0.12240.316-0.0008-0.02230.14870.095-0.0125-0.04940.00430.0037-0.02890.021-0.050389.160650.886535.7822
23.34731.5933-0.47343.5572-0.94791.73570.1037-0.04670.12920.06210.07180.51160.0959-0.0664-0.1755-0.0479-0.02690.1387-0.07710.0044-0.050563.711858.435641.1392
Refinement TLS group
IDRefine-IDRefine TLS-IDAuth asym-IDLabel asym-IDAuth seq-IDLabel seq-ID
1X-RAY DIFFRACTION1AA48 - 32544 - 313
2X-RAY DIFFRACTION2AA15 - 4711 - 43
3X-RAY DIFFRACTION2AA326 - 409314 - 396

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