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- PDB-1y8k: Horse methemoglobin low salt, PH 7.0 (88% relative humidity) -

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Basic information

Entry
Database: PDB / ID: 1y8k
TitleHorse methemoglobin low salt, PH 7.0 (88% relative humidity)
Components
  • Hemoglobin alpha chains
  • Hemoglobin beta chain
KeywordsOXYGEN STORAGE/TRANSPORT / AQUO METHEMOGLOBIN / QUARTERNARY ASSOCIATION / ALLOSTERIC TRANSITION / PROTEIN HYDRATION / OXYGEN STORAGE-TRANSPORT COMPLEX
Function / homology
Function and homology information


hemoglobin alpha binding / cellular oxidant detoxification / haptoglobin-hemoglobin complex / organic acid binding / hemoglobin complex / hydrogen peroxide catabolic process / oxygen carrier activity / oxygen binding / iron ion binding / heme binding / metal ion binding
Similarity search - Function
Hemoglobin, pi / Hemoglobin, alpha-type / Hemoglobin, beta-type / : / Globin/Protoglobin / Globins / Globin domain profile. / Globin-like / Globin / Globin ...Hemoglobin, pi / Hemoglobin, alpha-type / Hemoglobin, beta-type / : / Globin/Protoglobin / Globins / Globin domain profile. / Globin-like / Globin / Globin / Globin-like superfamily / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
PROTOPORPHYRIN IX CONTAINING FE / Hemoglobin subunit alpha / Hemoglobin subunit beta
Similarity search - Component
Biological speciesEquus caballus (horse)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.3 Å
AuthorsSankaranarayanan, R. / Biswal, B.K. / Vijayan, M.
Citation
Journal: Proteins / Year: 2005
Title: A new relaxed state in horse methemoglobin characterized by crystallographic studies.
Authors: Sankaranarayanan, R. / Biswal, B.K. / Vijayan, M.
#1: Journal: Curr.Sci. / Year: 2001
Title: Structure of Human Methaemoglobin: The Variation of a Theme
Authors: Biswal, B.K. / Vijayan, M.
#2: Journal: Acta Crystallogr.,Sect.D / Year: 2002
Title: Structures of Human Oxy- and Deoxyhaemoglobin at Different Levels of Humidity: Variability in the T State
Authors: Biswal, B.K. / Vijayan, M.
History
DepositionDec 13, 2004Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 26, 2005Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Aug 23, 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_ref_seq_dif / 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_asym_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_asym_id / _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_asym_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_ref_seq_dif.details / _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: Hemoglobin alpha chains
B: Hemoglobin beta chain
C: Hemoglobin alpha chains
D: Hemoglobin beta chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)64,8078
Polymers62,3414
Non-polymers2,4664
Water6,954386
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)62.519, 80.140, 111.315
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 Hemoglobin alpha chains / Slow and fast


Mass: 15138.280 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: PH 7.0 AQUOMET STRUCTURE / Source: (natural) Equus caballus (horse) / References: UniProt: P01958
#2: Protein Hemoglobin beta chain


Mass: 16032.274 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Equus caballus (horse) / References: UniProt: P02062
#3: Chemical
ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


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


Mass: 18.015 Da / Num. of mol.: 386 / 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: 2.2 Å3/Da / Density % sol: 43.1 %
Crystal growTemperature: 293 K / Method: liquid diffusion / pH: 7
Details: 0.01M Phosphate Buffer, 30% PEG 3350, pH 7.0, LIQUID DIFFUSION, temperature 293K

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Data collection

DiffractionMean temperature: 293 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418 / Wavelength: 1.5418 Å
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Aug 28, 2002 / Details: OSMIC MIRROR
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.3→20 Å / Num. obs: 24502 / % possible obs: 96 % / Biso Wilson estimate: 31.5 Å2 / Rmerge(I) obs: 0.112
Reflection shellResolution: 2.3→2.38 Å / Rmerge(I) obs: 0.523 / Num. unique all: 2373 / % possible all: 94.9

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNS0.4refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: HORSE METHEMOGLOBIN, pdb entry 2MHB

2mhb


Resolution: 2.3→20 Å / Rfactor Rfree error: 0.007 / Data cutoff high absF: 372154.06 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.228 1150 4.9 %RANDOM
Rwork0.183 ---
obs0.183 23480 92 %-
all-25478 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 49.3435 Å2 / ksol: 0.30976 e/Å3
Displacement parametersBiso mean: 32.1 Å2
Baniso -1Baniso -2Baniso -3
1--0.9 Å20 Å20 Å2
2---0.2 Å20 Å2
3---1.1 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.32 Å0.25 Å
Luzzati d res low-20 Å
Luzzati sigma a0.27 Å0.19 Å
Refinement stepCycle: LAST / Resolution: 2.3→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4406 0 172 386 4964
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.008
X-RAY DIFFRACTIONc_angle_deg1.2
X-RAY DIFFRACTIONc_dihedral_angle_d19.7
X-RAY DIFFRACTIONc_improper_angle_d1.02
LS refinement shellResolution: 2.3→2.44 Å / Rfactor Rfree error: 0.022 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.285 169 4.7 %
Rwork0.23 3436 -
obs--86.3 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2PARAM19X.HEMETOPH19X.HEME
X-RAY DIFFRACTION3WATER_REP.PARAMWATER.TOP

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