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- PDB-2e54: Crystal structure of acetylornithine aminotransferase from Thermo... -

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Basic information

Entry
Database: PDB / ID: 2.0E+54
TitleCrystal structure of acetylornithine aminotransferase from Thermotoga maritima
ComponentsAcetylornithine aminotransferase
KeywordsTRANSFERASE / argD / Structural Genomics / NPPSFA / National Project on Protein Structural and Functional Analyses / RIKEN Structural Genomics/Proteomics Initiative / RSGI
Function / homology
Function and homology information


acetylornithine transaminase / N2-acetyl-L-ornithine:2-oxoglutarate 5-aminotransferase activity / arginine biosynthetic process / pyridoxal phosphate binding / identical protein binding / cytoplasm
Similarity search - Function
Acetylornithine/Succinylornithine transaminase family / : / Aminotransferases class-III pyridoxal-phosphate attachment site. / Aminotransferase class-III / Aminotransferase class-III / 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 ...Acetylornithine/Succinylornithine transaminase family / : / Aminotransferases class-III pyridoxal-phosphate attachment site. / Aminotransferase class-III / Aminotransferase class-III / 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
PYRIDOXAL-5'-PHOSPHATE / Acetylornithine aminotransferase
Similarity search - Component
Biological speciesThermotoga maritima (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.5 Å
AuthorsMizutani, H. / Kunishima, N. / RIKEN Structural Genomics/Proteomics Initiative (RSGI)
CitationJournal: To be Published
Title: Crystal structure of acetylornithine aminotransferase from Thermotoga maritima
Authors: Mizutani, H. / Kunishima, N.
History
DepositionDec 19, 2006Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jun 19, 2007Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Source and taxonomy / 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_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_seq_id / _pdbx_struct_conn_angle.ptnr3_auth_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

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Assembly

Deposited unit
A: Acetylornithine aminotransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)43,3546
Polymers42,9371
Non-polymers4175
Water9,296516
1
A: Acetylornithine aminotransferase
hetero molecules

A: Acetylornithine aminotransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)86,70912
Polymers85,8742
Non-polymers83510
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_655-x+1,-y,z1
Buried area11950 Å2
ΔGint-95 kcal/mol
Surface area24600 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)67.222, 115.697, 52.448
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212
Components on special symmetry positions
IDModelComponents
11A-1136-

HOH

21A-1489-

HOH

DetailsThe biological assembly is a dimer generated by the operations: -x+1, -y, z+1.

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Components

#1: Protein Acetylornithine aminotransferase / ACOAT


Mass: 42937.129 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Thermotoga maritima (bacteria) / Strain: MSB8 / Plasmid: pET21a / Production host: Escherichia coli (E. coli) / Strain (production host): BL21-CodonPlus(DE3)-RIL / References: UniProt: Q9X2A5, acetylornithine transaminase
#2: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Na
#3: Chemical ChemComp-PLP / PYRIDOXAL-5'-PHOSPHATE / VITAMIN B6 Phosphate / Pyridoxal phosphate


Mass: 247.142 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H10NO6P
#4: Chemical ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL / Ethylene glycol


Mass: 62.068 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C2H6O2
#5: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 516 / 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: 2.37 Å3/Da / Density % sol: 48.19 %
Crystal growTemperature: 295 K / Method: microbatch / pH: 8.5
Details: 0.2M NaCl, 0.1M Tris-HCl, 25%(w/v) PEG 3350, pH 8.5, microbatch, temperature 295K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SPring-8 / Beamline: BL26B1 / Wavelength: 1 Å
DetectorType: RIGAKU RAXIS V / Detector: IMAGE PLATE / Date: Oct 16, 2006
RadiationMonochromator: bending magnet / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.5→30 Å / Num. all: 66199 / Num. obs: 66199 / % possible obs: 99.9 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 7 % / Biso Wilson estimate: 21.1 Å2 / Rmerge(I) obs: 0.066 / Rsym value: 0.063 / Net I/σ(I): 14.8
Reflection shellResolution: 1.5→1.55 Å / Redundancy: 6.9 % / Rmerge(I) obs: 0.364 / Mean I/σ(I) obs: 5.35 / Num. unique all: 6498 / Rsym value: 0.34 / % possible all: 100

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Processing

Software
NameVersionClassification
CNS1.1refinement
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1VEF

1vef


Resolution: 1.5→30 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 1368180.57 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.213 3333 5 %RANDOM
Rwork0.196 ---
all0.197 66127 --
obs0.196 66127 99.6 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 65.4862 Å2 / ksol: 0.387397 e/Å3
Displacement parametersBiso mean: 20.8 Å2
Baniso -1Baniso -2Baniso -3
1-2.7 Å20 Å20 Å2
2---4.39 Å20 Å2
3---1.68 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.19 Å0.18 Å
Luzzati d res low-5 Å
Luzzati sigma a0.15 Å0.12 Å
Refinement stepCycle: LAST / Resolution: 1.5→30 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3019 0 26 516 3561
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d21.9
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.82
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it0.961.5
X-RAY DIFFRACTIONc_mcangle_it1.422
X-RAY DIFFRACTIONc_scbond_it1.842
X-RAY DIFFRACTIONc_scangle_it2.772.5
LS refinement shellResolution: 1.5→1.59 Å / Rfactor Rfree error: 0.011 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.267 563 5.2 %
Rwork0.251 10275 -
obs--99.7 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2water_rep.paramwater.top
X-RAY DIFFRACTION3ion.paramion.top
X-RAY DIFFRACTION4plp.paramplp.top
X-RAY DIFFRACTION5egl.paramegl.top

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