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- PDB-1lt0: Crystal structure of the CN-bound BjFixL heme domain -

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Basic information

Entry
Database: PDB / ID: 1lt0
TitleCrystal structure of the CN-bound BjFixL heme domain
ComponentsSensor protein FixL
KeywordsTRANSFERASE / PAS fold
Function / homology
Function and homology information


histidine phosphotransfer kinase activity / nitrogen fixation / phosphorelay sensor kinase activity / histidine kinase / phosphorelay signal transduction system / 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 / PAS domain superfamily / Histidine kinase-like ATPases / Histidine kinase/HSP90-like ATPase superfamily / 2-Layer Sandwich / Alpha Beta
Similarity search - Domain/homology
CYANIDE ION / 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 20, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 20, 2002Provider: repository / Type: Initial release
SupersessionJan 21, 2003ID: 1DRQ
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)15,5623
Polymers14,9201
Non-polymers6432
Water64936
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)127.77, 127.77, 58.30
Angle α, β, γ (deg.)90.00, 90.00, 120.00
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-CYN / CYANIDE ION


Mass: 26.017 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: CN
#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.: 36 / 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: 3.07 Å3/Da / Density % sol: 59.91 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 7.5
Details: SODIUM CHLORIDE, MPD, HEPES, 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: 1 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: May 28, 2000 / Details: mirrors
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.7→20 Å / Num. all: 7182 / Num. obs: 7032 / % possible obs: 96.9 % / Observed criterion σ(I): -3 / Redundancy: 3.3 % / Rmerge(I) obs: 0.032 / Rsym value: 0.032 / Net I/σ(I): 24.3
Reflection shellResolution: 2.4→2.48 Å / Rmerge(I) obs: 0.221 / Mean I/σ(I) obs: 7 / Num. unique all: 900 / Rsym value: 0.221 / % possible all: 100
Reflection
*PLUS
Highest resolution: 2.4 Å / Num. obs: 7182 / Num. measured all: 26220
Reflection shell
*PLUS
% possible obs: 100 %

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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 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.268 591 -RANDOM
Rwork0.226 ---
all-7182 --
obs-7032 96.9 %-
Displacement parametersBiso mean: 18.8 Å2
Refinement stepCycle: LAST / Resolution: 2.4→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms921 0 45 36 1002
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_angle_deg1.73
X-RAY DIFFRACTIONx_bond_d0.016
LS refinement shellResolution: 2.4→2.51 Å
RfactorNum. reflection% reflection
Rfree0.329 66 -
Rwork0.225 --
obs-879 100 %
Refinement
*PLUS
Highest resolution: 2.4 Å / % reflection Rfree: 8 %
Solvent computation
*PLUS
Displacement parameters
*PLUS

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