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- PDB-3g4q: Ligand migration and cavities within scapharca dimeric hemoglobin... -

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Basic information

Entry
Database: PDB / ID: 3g4q
TitleLigand migration and cavities within scapharca dimeric hemoglobin: wild type with co bound to heme and chloroform bound to the XE4 cavity
ComponentsGlobin-1
KeywordsOXYGEN BINDING / OXYGEN TRANSPORT / ALLOSTERY / OXYGEN AFFINITY / CYTOPLASM / HEME / IRON / METAL-BINDING / OXYGEN STORAGE/TRANSPORT / Transport
Function / homology
Function and homology information


oxygen carrier activity / oxygen binding / response to hypoxia / heme binding / identical protein binding / metal ion binding / cytoplasm
Similarity search - Function
: / Myoglobin-like, M family globin domain / Globin/Protoglobin / Globins / Globin domain profile. / Globin-like / Globin / Globin / Globin-like superfamily / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
CARBON MONOXIDE / PROTOPORPHYRIN IX CONTAINING FE / trichloromethane / Globin-1
Similarity search - Component
Biological speciesScapharca inaequivalvis (ark clam)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 1.6 Å
AuthorsKnapp, J.E. / Pahl, R. / Cohen, J. / Nichols, J.C. / Schulten, K. / Gibson, Q.H. / Srajer, V. / Royer Jr., W.E.
CitationJournal: Structure / Year: 2009
Title: Ligand migration and cavities within Scapharca Dimeric HbI: studies by time-resolved crystallo-graphy, Xe binding, and computational analysis.
Authors: Knapp, J.E. / Pahl, R. / Cohen, J. / Nichols, J.C. / Schulten, K. / Gibson, Q.H. / Srajer, V. / Royer, W.E.
History
DepositionFeb 4, 2009Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 1, 2009Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Sep 6, 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 / struct_conn / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _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_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: Globin-1
B: Globin-1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)33,5829
Polymers31,9352
Non-polymers1,6477
Water3,225179
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area4860 Å2
ΔGint-54 kcal/mol
Surface area12240 Å2
MethodPISA
Unit cell
Length a, b, c (Å)93.180, 43.890, 83.490
Angle α, β, γ (deg.)90.00, 121.93, 90.00
Int Tables number5
Space group name H-MC121

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Components

#1: Protein Globin-1 / Globin I / HbI / Dimeric hemoglobin


Mass: 15967.304 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Scapharca inaequivalvis (ark clam) / Gene: HBI / Plasmid: pCS-26 / Production host: Escherichia coli (E. coli) / Strain (production host): W3110LACIQL8 / References: UniProt: P02213
#2: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#3: Chemical ChemComp-CMO / CARBON MONOXIDE


Mass: 28.010 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: CO
#4: Chemical ChemComp-MCH / trichloromethane / Chloroform CHCl3


Mass: 119.378 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: CHCl3
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 179 / 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: 43.5 %
Crystal growTemperature: 296 K / Method: microbatch / pH: 7.5
Details: 1.5-2.5M PHOSPHATE BUFFER, PH 7.50, SMALL TUBES, TEMPERATURE 298K, Microbatch, temperature 296K

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Data collection

DiffractionMean temperature: 295 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU / Wavelength: 1.54 / Wavelength: 1.54 Å
DetectorType: MAR scanner 345 mm plate / Detector: IMAGE PLATE / Date: May 14, 2004 / Details: OSMIC MIRRORS
RadiationMonochromator: OSMIC MIRRORS / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.54 Å / Relative weight: 1
ReflectionResolution: 1.6→100 Å / Num. all: 38032 / Num. obs: 34419 / % possible obs: 90.5 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 4.1 % / Biso Wilson estimate: 22.1 Å2 / Rmerge(I) obs: 0.067 / Rsym value: 0.067 / Net I/σ(I): 17.1
Reflection shellResolution: 1.6→1.65 Å / Rmerge(I) obs: 0.215 / Mean I/σ(I) obs: 6.1 / Rsym value: 0.215 / % possible all: 85.8

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Processing

Software
NameClassification
MAR345dtbdata collection
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 3SDH

3sdh


Resolution: 1.6→38.38 Å / Rfactor Rfree error: 0.005 / Data cutoff high absF: 1121650.66 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber / Details: BULK SOLVENT MODEL USED
RfactorNum. reflection% reflectionSelection details
Rfree0.219 1703 5 %RANDOM
Rwork0.201 ---
obs0.201 34328 90 %-
all-38032 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 45.1407 Å2 / ksol: 0.4 e/Å3
Displacement parametersBiso mean: 17 Å2
Baniso -1Baniso -2Baniso -3
1-0.77 Å20 Å20.21 Å2
2--2.68 Å20 Å2
3----3.45 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.21 Å0.19 Å
Luzzati d res low-5 Å
Luzzati sigma a0.12 Å0.05 Å
Refinement stepCycle: LAST / Resolution: 1.6→38.38 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2232 0 102 179 2513
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_angle_deg1.1
X-RAY DIFFRACTIONc_dihedral_angle_d18.3
X-RAY DIFFRACTIONc_improper_angle_d1.08
LS refinement shellResolution: 1.6→1.69 Å / Rfactor Rfree error: 0.023 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.359 247 5.1 %
Rwork0.313 4627 -
obs--75.8 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2param19x.hemetoph19x.heme
X-RAY DIFFRACTION3water_rep.paramwater_rep.top
X-RAY DIFFRACTION4chloroform.paramchloroform.top

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