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- PDB-6mfl: Structure of siderophore binding protein BauB bound to a complex ... -

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Basic information

Entry
Database: PDB / ID: 6mfl
TitleStructure of siderophore binding protein BauB bound to a complex between two molecules of acinetobactin and ferric iron.
ComponentsSiderophore Binding Protein BauB
KeywordsMETAL TRANSPORT / Siderophore Binding Protein / periplasmic protein / substrate binding protein / iron acquisition
Function / homology
Function and homology information


FatB domain / ABC transporter periplasmic binding domain / Periplasmic binding protein / Iron siderophore/cobalamin periplasmic-binding domain profile. / Nitrogenase molybdenum iron protein domain / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Biological speciesAcinetobacter baumannii (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.9 Å
AuthorsGulick, A.M. / Bailey, D.C. / Wencewicz, T.A.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)AI116998 United States
CitationJournal: Biochemistry / Year: 2018
Title: Crystal Structure of the Siderophore Binding Protein BauB Bound to an Unusual 2:1 Complex Between Acinetobactin and Ferric Iron.
Authors: Bailey, D.C. / Bohac, T.J. / Shapiro, J.A. / Giblin, D.E. / Wencewicz, T.A. / Gulick, A.M.
History
DepositionSep 11, 2018Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 21, 2018Provider: repository / Type: Initial release
Revision 1.1May 1, 2019Group: Data collection / Database references / Category: citation
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.2Dec 18, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.3Oct 11, 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
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_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id
Revision 1.4May 1, 2024Group: Structure summary / Category: entity / Item: _entity.pdbx_description

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Siderophore Binding Protein BauB
B: Siderophore Binding Protein BauB
hetero molecules


Theoretical massNumber of molelcules
Total (without water)71,14410
Polymers69,5232
Non-polymers1,6218
Water6,702372
1
A: Siderophore Binding Protein BauB
hetero molecules


Theoretical massNumber of molelcules
Total (without water)35,5725
Polymers34,7621
Non-polymers8114
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
2
B: Siderophore Binding Protein BauB
hetero molecules


Theoretical massNumber of molelcules
Total (without water)35,5725
Polymers34,7621
Non-polymers8114
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)37.762, 137.055, 56.208
Angle α, β, γ (deg.)90.00, 90.02, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Siderophore Binding Protein BauB / Probable ferric acinetobactin binding protein


Mass: 34761.621 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Acinetobacter baumannii (bacteria) / Gene: bauB / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q76HK0
#2: Chemical ChemComp-FE / FE (III) ION


Mass: 55.845 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Fe
#3: Chemical
ChemComp-OPV / ~{N}-[(4~{S},5~{S})-2-[2-(1~{H}-imidazol-4-yl)ethyl]-5-methyl-3-oxidanylidene-1,2-oxazolidin-4-yl]-2,3-bis(oxidanyl)benzamide


Mass: 346.338 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C16H18N4O5 / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL


Mass: 62.068 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C2H6O2
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 372 / 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: 2

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Sample preparation

Crystal
IDDensity Matthews3/Da)Density % sol (%)
12.0941.21
2
Crystal grow
Temperature (K)Crystal-IDMethodpHDetails
2871vapor diffusion, hanging drop625% PEG MME 5k, 50 mM MES
2872vapor diffusion, hanging drop834% PEG 4k, 100 mM EPPS

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Data collection

Diffraction
IDMean temperature (K)Crystal-ID
11131
21131
31132
Diffraction source
SourceSiteBeamlineIDWavelength (Å)
SYNCHROTRONSSRL BL12-210.9795
SYNCHROTRONSSRL BL12-220.9795
SYNCHROTRONAPS 23-ID-D31.0332
Detector
TypeIDDetectorDate
DECTRIS PILATUS3 6M1PIXEL
DECTRIS PILATUS3 6M2PIXELFeb 10, 2018
DECTRIS PILATUS3 6M3PIXELNov 12, 2017
Radiation
IDProtocolMonochromatic (M) / Laue (L)Scattering typeWavelength-ID
1SINGLE WAVELENGTHMx-ray1
2SINGLE WAVELENGTHMx-ray2
3SINGLE WAVELENGTHMx-ray3
Radiation wavelength
IDWavelength (Å)Relative weight
10.97951
21.03321
31
Reflection

Entry-ID: 6MFL

Resolution (Å)Num. obs% possible obs (%)Redundancy (%)CC1/2Rmerge(I) obsRpim(I) allRrim(I) allDiffraction-IDNet I/σ(I)
1.9-684458099.27.80.970.1780.0560.204111.6
1.9-6826033887.36.70.9950.090.0560.106211.8
1.99-45.63814997.73.20.9410.190.1434.9
Reflection shell
Resolution (Å)Redundancy (%)Rmerge(I) obsMean I/σ(I) obsNum. unique obsCC1/2Rpim(I) allRrim(I) allDiffraction-ID% possible all
1.9-26.40.576.7379280.9740.0760.204190.5
1.99-2.0430.5812.226100.4190.45291.1

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Processing

Software
NameVersionClassification
PHENIX(1.13_2998: ???)refinement
MOSFLMdata reduction
Aimlessdata scaling
PHENIXphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3GFV
Resolution: 1.9→56.208 Å / SU ML: 0.18 / Cross valid method: FREE R-VALUE / σ(F): 1.34 / Phase error: 20.48
RfactorNum. reflection% reflectionSelection details
Rfree0.2138 2140 4.84 %random
Rwork0.1694 ---
obs0.1715 44255 98.56 %-
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å
Refinement stepCycle: LAST / Resolution: 1.9→56.208 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4422 0 110 372 4904
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0114658
X-RAY DIFFRACTIONf_angle_d1.1186335
X-RAY DIFFRACTIONf_dihedral_angle_d17.1542787
X-RAY DIFFRACTIONf_chiral_restr0.069710
X-RAY DIFFRACTIONf_plane_restr0.007825
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
1.9-1.94420.21731300.16492785X-RAY DIFFRACTION96
1.9442-1.99280.24451430.16822751X-RAY DIFFRACTION97
1.9928-2.04670.22811740.16662698X-RAY DIFFRACTION97
2.0467-2.10690.22021400.18192789X-RAY DIFFRACTION98
2.1069-2.17490.21951630.16372780X-RAY DIFFRACTION99
2.1749-2.25270.2711510.16452815X-RAY DIFFRACTION99
2.2527-2.34290.18971330.15782837X-RAY DIFFRACTION99
2.3429-2.44950.20481510.16422775X-RAY DIFFRACTION99
2.4495-2.57860.20641350.16282800X-RAY DIFFRACTION98
2.5786-2.74020.23641340.16252852X-RAY DIFFRACTION100
2.7402-2.95180.20241350.17052863X-RAY DIFFRACTION100
2.9518-3.24880.26311390.18082812X-RAY DIFFRACTION99
3.2488-3.71880.18581360.16912865X-RAY DIFFRACTION100
3.7188-4.6850.1751370.15422851X-RAY DIFFRACTION99
4.685-56.23260.22191390.19682842X-RAY DIFFRACTION99

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