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- PDB-1b8a: ASPARTYL-TRNA SYNTHETASE -

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Basic information

Entry
Database: PDB / ID: 1b8a
TitleASPARTYL-TRNA SYNTHETASE
ComponentsPROTEIN (ASPARTYL-TRNA SYNTHETASE)
KeywordsLIGASE / SYNTHETASE / TRNA LIGASE
Function / homology
Function and homology information


aspartate-tRNA ligase / aspartyl-tRNA aminoacylation / aspartate-tRNA ligase activity / aminoacyl-tRNA synthetase multienzyme complex / magnesium ion binding / RNA binding / ATP binding / cytosol
Similarity search - Function
Aspartate-tRNA synthetase, type 2 / Aspartyl/Asparaginyl-tRNA synthetase, class IIb / Aminoacyl-tRNA synthetase, class II (D/K/N) / tRNA synthetases class II (D, K and N) / OB-fold nucleic acid binding domain, AA-tRNA synthetase-type / OB-fold nucleic acid binding domain / Bira Bifunctional Protein; Domain 2 / Aminoacyl-tRNA synthetase, class II / Aminoacyl-transfer RNA synthetases class-II family profile. / BirA Bifunctional Protein; domain 2 ...Aspartate-tRNA synthetase, type 2 / Aspartyl/Asparaginyl-tRNA synthetase, class IIb / Aminoacyl-tRNA synthetase, class II (D/K/N) / tRNA synthetases class II (D, K and N) / OB-fold nucleic acid binding domain, AA-tRNA synthetase-type / OB-fold nucleic acid binding domain / Bira Bifunctional Protein; Domain 2 / Aminoacyl-tRNA synthetase, class II / Aminoacyl-transfer RNA synthetases class-II family profile. / BirA Bifunctional Protein; domain 2 / Class II Aminoacyl-tRNA synthetase/Biotinyl protein ligase (BPL) and lipoyl protein ligase (LPL) / Nucleic acid-binding proteins / OB fold (Dihydrolipoamide Acetyltransferase, E2P) / Nucleic acid-binding, OB-fold / Beta Barrel / 2-Layer Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
ADENOSINE-5'-TRIPHOSPHATE / : / Aspartate--tRNA(Asp) ligase
Similarity search - Component
Biological speciesThermococcus kodakarensis (archaea)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.9 Å
AuthorsSchmitt, E. / Moulinier, L. / Thierry, J.-C. / Moras, D.
CitationJournal: EMBO J. / Year: 1998
Title: Crystal structure of aspartyl-tRNA synthetase from Pyrococcus kodakaraensis KOD: archaeon specificity and catalytic mechanism of adenylate formation.
Authors: Schmitt, E. / Moulinier, L. / Fujiwara, S. / Imanaka, T. / Thierry, J.C. / Moras, D.
History
DepositionJan 27, 1999Deposition site: PDBE / Processing site: RCSB
Revision 1.0Feb 2, 1999Provider: repository / Type: Initial release
Revision 1.1Apr 26, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Source and taxonomy / Version format compliance
Revision 1.3Oct 4, 2017Group: Refinement description / Category: software / Item: _software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: PROTEIN (ASPARTYL-TRNA SYNTHETASE)
B: PROTEIN (ASPARTYL-TRNA SYNTHETASE)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)103,30510
Polymers101,9612
Non-polymers1,3448
Water22,1581230
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area11420 Å2
ΔGint-86 kcal/mol
Surface area33620 Å2
MethodPISA
Unit cell
Length a, b, c (Å)124.800, 125.000, 87.160
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Cell settingorthorhombic
Space group name H-MP21212
Noncrystallographic symmetry (NCS)NCS oper: (Code: given
Matrix: (-0.0651, 0.9967, -0.049), (0.9966, 0.0624, -0.0538), (-0.0505, -0.0523, -0.9974)
Vector: 4.4794, -4.0543, 5.9795)

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Components

#1: Protein PROTEIN (ASPARTYL-TRNA SYNTHETASE) / EC 6.1.1.12 / ASPARTYL TRNA LIGASE


Mass: 50980.398 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Thermococcus kodakarensis (archaea) / Strain: KOD1 / Cellular location: CYTOPLASM / Gene: ASPS / Plasmid: PUC18F / Production host: Escherichia coli (E. coli) / References: UniProt: Q52428, aspartate-tRNA ligase
#2: Chemical
ChemComp-MN / MANGANESE (II) ION


Mass: 54.938 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: Mn
#3: Chemical ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE / Adenosine triphosphate


Mass: 507.181 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Comment: ATP, energy-carrying molecule*YM
#4: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 1230 / 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: 3.33 Å3/Da / Density % sol: 63.09 %
Crystal growpH: 7.5 / Details: pH 7.5
Crystal grow
*PLUS
Temperature: 24 ℃ / Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
14 mg/mlprotein1drop
210 mMTris-HCl1reservoir
310 mM2-mercaptoethanol1reservoir
4100 mM1reservoirKCl
532-38 %ethylene glycol1reservoir

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Data collection

DiffractionMean temperature: 120 K
Diffraction sourceSource: SYNCHROTRON / Site: LURE / Beamline: DW32 / Wavelength: 1
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Details: MIRRORS
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.9→15 Å / Num. obs: 3916674 / % possible obs: 96 % / Observed criterion σ(I): 2 / Redundancy: 3.8 % / Biso Wilson estimate: 8.2 Å2 / Rsym value: 5
Reflection
*PLUS
Num. obs: 105560 / Num. measured all: 3916674 / Rmerge(I) obs: 0.05
Reflection shell
*PLUS
Rmerge(I) obs: 0.269

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Processing

Software
NameVersionClassification
AMoREphasing
CNS0.4refinement
MOSFLMdata reduction
CCP4(AGROVATAdata scaling
ROTAVATAdata scaling
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1ASZ

1asz


Resolution: 1.9→15 Å / Rfactor Rfree error: 0.003 / Data cutoff high rms absF: 2674497.32 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.202 5102 5 %RANDOM
Rwork0.168 ---
all-101060 --
obs-101060 93.9 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 50.7 Å2 / ksol: 0.37 e/Å3
Displacement parametersBiso mean: 19 Å2
Baniso -1Baniso -2Baniso -3
1-6.12 Å20 Å20 Å2
2---2.26 Å20 Å2
3----3.87 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.21 Å0.17 Å
Luzzati d res low-5 Å
Luzzati sigma a0.17 Å0.13 Å
Refinement stepCycle: LAST / Resolution: 1.9→15 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms7188 0 68 1230 8486
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONx_bond_d0.013
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg1.7
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d23.3
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.05
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it0.881.5
X-RAY DIFFRACTIONx_mcangle_it1.432
X-RAY DIFFRACTIONx_scbond_it1.492
X-RAY DIFFRACTIONx_scangle_it2.242.5
LS refinement shellResolution: 1.9→2.02 Å / Rfactor Rfree error: 0.009 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.239 784 5.1 %
Rwork0.2 14554 -
obs--86.6 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2DNAMULTLUC.PARAMDNA-RNA_OLD.TOP
X-RAY DIFFRACTION3LIGAND.PARAMWATER.TOP
X-RAY DIFFRACTION4PARAM19.IONLIGAND.TOP
Software
*PLUS
Name: CNS / Version: 0.4 / Classification: refinement
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_deg
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg23.3
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg1.05
X-RAY DIFFRACTIONc_mcbond_it
X-RAY DIFFRACTIONc_scbond_it
X-RAY DIFFRACTIONc_mcangle_it
X-RAY DIFFRACTIONc_scangle_it

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