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- PDB-1nz2: K45E Variant of Horse Heart Myoglobin -

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Basic information

Entry
Database: PDB / ID: 1nz2
TitleK45E Variant of Horse Heart Myoglobin
ComponentsMyoglobin
KeywordsOXYGEN STORAGE/TRANSPORT / muscle / oxygen transport / heme / OXYGEN STORAGE-TRANSPORT COMPLEX
Function / homology
Function and homology information


Oxidoreductases; Acting on other nitrogenous compounds as donors / nitrite reductase activity / oxygen transport / sarcoplasm / Oxidoreductases; Acting on a peroxide as acceptor; Peroxidases / removal of superoxide radicals / oxygen carrier activity / peroxidase activity / oxygen binding / heme binding / metal ion binding
Similarity search - Function
Myoglobin / Globins / Globin-like / Globin / Globin / Globin domain profile. / Globin-like superfamily / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
PROTOPORPHYRIN IX CONTAINING FE / Myoglobin
Similarity search - Component
Biological speciesEquus caballus (horse)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 1.9 Å
AuthorsHunter, C.L. / Maurus, R. / Mauk, M.R. / Lee, H. / Raven, E.L. / Tong, H. / Nguyen, N. / Smith, M. / Brayer, G.D. / Mauk, A.G.
CitationJournal: Proc.Natl.Acad.Sci.USA / Year: 2003
Title: Introduction and characterization of a functionally linked metal ion binding site at the exposed heme edge of myoglobin
Authors: Hunter, C.L. / Maurus, R. / Mauk, M.R. / Lee, H. / Raven, E.L. / Tong, H. / Nguyen, N. / Smith, M. / Brayer, G.D. / Mauk, A.G.
History
DepositionFeb 15, 2003Deposition site: RCSB / Processing site: RCSB
Revision 1.0Apr 8, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 29, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Oct 11, 2017Group: Refinement description / Category: software
Revision 1.4Oct 27, 2021Group: Database references / Derived calculations / Category: database_2 / 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_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.5Aug 16, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Myoglobin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)17,6963
Polymers16,9831
Non-polymers7132
Water1,20767
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)64.2, 28.8, 35.9
Angle α, β, γ (deg.)90, 107.1, 90
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Myoglobin


Mass: 16983.447 Da / Num. of mol.: 1 / Mutation: K45E
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Equus caballus (horse) / Gene: MB / Production host: Escherichia coli (E. coli) / References: UniProt: P68082
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: SO4
#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.: 67 / 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: 1.87 Å3/Da / Density % sol: 34.13 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7.3
Details: Ammonium Sulfate, pH 7.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal grow
*PLUS
Temperature: 25 ℃
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
115 mg/mlprotein1drop
260 %satammonium sulfate1drop
320 mMTris-HCl1drop
41 mMEDTA1droppH7.3
567 %satammonium sulfate1reservoir
620 mMTris-HCl1reservoir
71 mMEDTA1reservoir

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Data collection

DiffractionMean temperature: 298 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU300 / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IIC / Detector: IMAGE PLATE
RadiationMonochromator: Mirrors / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.7→10 Å / Num. obs: 10978 / % possible obs: 77 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Rmerge(I) obs: 0.057
Reflection
*PLUS
Lowest resolution: 10 Å / % possible obs: 77 %

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Processing

Software
NameClassification
X-PLORmodel building
PROLSQrefinement
X-PLORphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1WLA

1wla


Resolution: 1.9→10 Å / σ(F): 0 / σ(I): 0 /
RfactorNum. reflection
obs0.165 10978
Refinement stepCycle: LAST / Resolution: 1.9→10 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1199 0 48 67 1314
Refinement
*PLUS
Highest resolution: 1.7 Å / Lowest resolution: 10 Å / Rfactor Rwork: 0.165
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONo_bond_d0.021
X-RAY DIFFRACTIONo_angle_d0.039
X-RAY DIFFRACTIONo_planar_d0.056
X-RAY DIFFRACTIONo_plane_restr0.016
X-RAY DIFFRACTIONo_chiral_restr0.047

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