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- PDB-1iyn: Crystal structure of chloroplastic ascorbate peroxidase from toba... -

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Basic information

Entry
Database: PDB / ID: 1iyn
TitleCrystal structure of chloroplastic ascorbate peroxidase from tobacco plants and structural insights for its instability
ComponentsChloroplastic ascorbate peroxidase
KeywordsOXIDOREDUCTASE / ascorbate / peroxidase / hydrogen peroxide / tobacco plant / stromal ascorbate peroxidase
Function / homology
Function and homology information


L-ascorbate peroxidase activity / lactoperoxidase activity / cellular response to oxidative stress / heme binding / metal ion binding
Similarity search - Function
Class I peroxidase / Heme-binding peroxidase Ccp1-like / Peroxidase; domain 2 / Peroxidase, domain 2 / Peroxidase; domain 1 - #10 / Peroxidase; domain 1 / Peroxidases heam-ligand binding site / Plant heme peroxidase family profile. / Haem peroxidase / Peroxidase ...Class I peroxidase / Heme-binding peroxidase Ccp1-like / Peroxidase; domain 2 / Peroxidase, domain 2 / Peroxidase; domain 1 - #10 / Peroxidase; domain 1 / Peroxidases heam-ligand binding site / Plant heme peroxidase family profile. / Haem peroxidase / Peroxidase / Peroxidases proximal heme-ligand signature. / Haem peroxidase superfamily / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
PROTOPORPHYRIN IX CONTAINING FE / Stromal ascorbate peroxidase
Similarity search - Component
Biological speciesNicotiana tabacum (common tobacco)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.6 Å
AuthorsWada, K. / Tada, T. / Nakamura, Y.
CitationJournal: J.BIOCHEM.(TOKYO) / Year: 2003
Title: Crystal structure of chloroplastic ascorbate peroxidase from tobacco plants and structural insights into its instability
Authors: Wada, K. / Tada, T. / Nakamura, Y. / Ishikawa, T. / Yabuta, Y. / Yoshimura, K. / Shigeoka, S. / Nishimura, K.
History
DepositionSep 3, 2002Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Sep 3, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: 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_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_auth_comp_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr2_label_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_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

Downloads & links

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Assembly

Deposited unit
A: Chloroplastic ascorbate peroxidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)32,9454
Polymers32,2821
Non-polymers6623
Water5,332296
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)37.188, 76.790, 98.776
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121

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Components

#1: Protein Chloroplastic ascorbate peroxidase / stromal ascorbate peroxidase


Mass: 32282.164 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Nicotiana tabacum (common tobacco) / Plasmid: pET-3a / Production host: Escherichia coli (E. coli) / Strain (production host): BL21(DE3)pLysS / References: UniProt: Q8LNY5, L-ascorbate peroxidase
#2: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Na
#3: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 296 / 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: 2.18 Å3/Da / Density % sol: 43.65 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 8
Details: PEG 4000, Tris-HCl, Magnesium chloride, pH 8.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Crystal grow
*PLUS
Temperature: 277 K / pH: 7 / Method: vapor diffusion, hanging drop / Details: Wada, K., (2002) Acta Crystallogr., D58, 559.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
150 mMHEPES1reservoirpH7.0
21 mMAsA1reservoir
38 mg/mlprotein1drop

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: Photon Factory / Beamline: BL-18B / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Jun 7, 2001
RadiationMonochromator: Doubel-crystal silicon (111) + germanium (220)
Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.6→8 Å / Num. all: 38117 / Num. obs: 38108 / % possible obs: 99.8 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 6.4 % / Biso Wilson estimate: 13.8 Å2 / Rmerge(I) obs: 0.065 / Rsym value: 0.065 / Net I/σ(I): 8.1
Reflection shellResolution: 1.6→1.69 Å / Redundancy: 6 % / Rmerge(I) obs: 0.239 / Mean I/σ(I) obs: 3.1 / Num. unique all: 5467 / Rsym value: 0.239 / % possible all: 99.8
Reflection
*PLUS
Num. obs: 37796 / % possible obs: 98.9 % / Redundancy: 6.5 % / Num. measured all: 1018666 / Rmerge(I) obs: 0.066
Reflection shell
*PLUS
% possible obs: 98.9 % / Rmerge(I) obs: 0.243 / Mean I/σ(I) obs: 3

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Processing

Software
NameVersionClassification
MOSFLMdata reduction
SCALAdata scaling
CNSrefinement
CCP4(SCALA)data scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1APX

1apx


Resolution: 1.6→7.99 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 1200065.89 / Data cutoff low absF: 0 / Isotropic thermal model: anisotropic / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.222 3794 10 %RANDOM
Rwork0.191 ---
all0.191 37822 --
obs0.191 37796 99.9 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 68.0462 Å2 / ksol: 0.47488 e/Å3
Displacement parametersBiso mean: 15.1 Å2
Baniso -1Baniso -2Baniso -3
1-1.25 Å20 Å20 Å2
2--0.74 Å20 Å2
3----1.99 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.2 Å0.18 Å
Luzzati d res low-5 Å
Luzzati sigma a0.1 Å0.13 Å
Refinement stepCycle: LAST / Resolution: 1.6→7.99 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2138 0 45 296 2479
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_d20.9
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.83
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it2.171.5
X-RAY DIFFRACTIONc_mcangle_it2.722
X-RAY DIFFRACTIONc_scbond_it4.812
X-RAY DIFFRACTIONc_scangle_it6.452.5
LS refinement shellResolution: 1.6→1.7 Å / Rfactor Rfree error: 0.01 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.251 625 10.1 %
Rwork0.234 5582 -
obs-5582 99.8 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER.PARAMWATER.TOP
X-RAY DIFFRACTION3HEC_XPLOR_PARAMHEC_XPLOR_TOP
X-RAY DIFFRACTION4ION.PARAMION.TOP
Refinement
*PLUS
Highest resolution: 1.6 Å / Lowest resolution: 8 Å / % reflection Rfree: 10 % / Rfactor Rfree: 0.223
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg20.9
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.83
LS refinement shell
*PLUS
Lowest resolution: 1.69 Å

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