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- PDB-1lsv: Crystal structure of the CO-bound BjFixL heme domain -

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Basic information

Entry
Database: PDB / ID: 1lsv
TitleCrystal structure of the CO-bound BjFixL heme domain
ComponentsSensor protein FixL
KeywordsTRANSFERASE / PAS fold
Function / homology
Function and homology information


histidine phosphotransfer kinase activity / nitrogen fixation / histidine kinase / phosphorelay sensor kinase activity / regulation of DNA-templated transcription / ATP binding / metal ion binding / plasma membrane
Similarity search - Function
: / PAS-associated, C-terminal / PAC domain profile. / His Kinase A (phospho-acceptor) domain / His Kinase A (phosphoacceptor) domain / Signal transduction histidine kinase, dimerisation/phosphoacceptor domain / PAC motif / Motif C-terminal to PAS motifs (likely to contribute to PAS structural domain) / PAS domain / Signal transduction histidine kinase-related protein, C-terminal ...: / PAS-associated, C-terminal / PAC domain profile. / His Kinase A (phospho-acceptor) domain / His Kinase A (phosphoacceptor) domain / Signal transduction histidine kinase, dimerisation/phosphoacceptor domain / PAC motif / Motif C-terminal to PAS motifs (likely to contribute to PAS structural domain) / PAS domain / Signal transduction histidine kinase-related protein, C-terminal / Signal transduction histidine kinase, dimerisation/phosphoacceptor domain superfamily / Histidine kinase domain / Histidine kinase domain profile. / Beta-Lactamase / PAS fold / PAS fold / PAS domain / PAS repeat profile. / Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase / PAS domain / Histidine kinase-like ATPases / PAS domain superfamily / Histidine kinase/HSP90-like ATPase / Histidine kinase/HSP90-like ATPase superfamily / 2-Layer Sandwich / Alpha Beta
Similarity search - Domain/homology
CARBON MONOXIDE / PROTOPORPHYRIN IX CONTAINING FE / Sensor protein FixL
Similarity search - Component
Biological speciesBradyrhizobium japonicum (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / FOURIER SYNTHESIS / Resolution: 2.4 Å
AuthorsHao, B. / Isaza, C. / Arndt, J. / Soltis, M. / Chan, M.K.
CitationJournal: Biochemistry / Year: 2002
Title: Structure-based mechanism of O2 sensing and ligand discrimination by the FixL heme domain of Bradyrhizobium japonicum
Authors: Hao, B. / Isaza, C. / Arndt, J. / Soltis, M. / Chan, M.K.
History
DepositionMay 19, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 20, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 14, 2024Group: 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_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_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_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: Sensor protein FixL
hetero molecules


Theoretical massNumber of molelcules
Total (without water)15,5643
Polymers14,9201
Non-polymers6442
Water68538
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)127.01, 127.01, 58.14
Angle α, β, γ (deg.)90, 90, 120
Int Tables number155
Space group name H-MH32

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Components

#1: Protein Sensor protein FixL


Mass: 14919.858 Da / Num. of mol.: 1 / Fragment: Heme domain (residues 141-270)
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bradyrhizobium japonicum (bacteria) / Gene: FixL / Plasmid: pBH32 / Production host: Escherichia coli (E. coli) / Strain (production host): TG1
References: UniProt: P23222, Transferases; Transferring phosphorus-containing groups; Phosphotransferases with a nitrogenous group as acceptor
#2: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME


Mass: 616.487 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H32FeN4O4
#3: Chemical ChemComp-CMO / CARBON MONOXIDE


Mass: 28.010 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: CO
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 38 / 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: 3.02 Å3/Da / Density % sol: 59.31 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: SODIUM CHLORIDE, MPD, HEPS, pH 7.5, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Crystal grow
*PLUS
Temperature: 4 ℃ / Method: vapor diffusion
Details: Gong, W., (1998) Proc. Natl. Acad. Sci. U.S.A., 95, 15177.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
14.5 M1reservoirNaCl
25 %MPD1reservoir
30.1 MHEPES1reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL9-2 / Wavelength: 0.979 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Feb 10, 2001 / Details: mirrors
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.979 Å / Relative weight: 1
ReflectionResolution: 2.4→20 Å / Num. all: 45212 / Num. obs: 45178 / % possible obs: 99.8 % / Observed criterion σ(I): -3 / Redundancy: 6.3 % / Rmerge(I) obs: 0.044 / Rsym value: 0.044 / Net I/σ(I): 14.4
Reflection shellResolution: 2.4→2.44 Å / Rmerge(I) obs: 0.315 / Mean I/σ(I) obs: 6.8 / Num. unique all: 364 / % possible all: 96.6
Reflection
*PLUS
Num. obs: 7132 / Num. measured all: 45212
Reflection shell
*PLUS
% possible obs: 96.6 %

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLOR3.851refinement
X-PLORphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: PDB ENTRY 1DRM

1drm


Resolution: 2.4→20 Å / Isotropic thermal model: Isotropic / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.251 614 -RANDOM
Rwork0.215 ---
all-7132 --
obs-7120 99.8 %-
Displacement parametersBiso mean: 20.6 Å2
Refinement stepCycle: LAST / Resolution: 2.4→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms923 0 45 38 1006
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_angle_deg1.68
X-RAY DIFFRACTIONx_bond_d0.014
LS refinement shellResolution: 2.4→2.51 Å
RfactorNum. reflection% reflection
Rfree0.274 85 -
Rwork0.196 --
obs-875 99.8 %
Refinement
*PLUS
Highest resolution: 2.4 Å / % reflection Rfree: 8 %
Solvent computation
*PLUS
Displacement parameters
*PLUS

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