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- PDB-8g3l: BceAB-S nucleotide free BceS state 2 -

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Basic information

Entry
Database: PDB / ID: 8g3l
TitleBceAB-S nucleotide free BceS state 2
Components
  • (Bacitracin export ...) x 2
  • Sensor protein BceS
KeywordsMEMBRANE PROTEIN / ABC transporter / histidine kinase / antimicrobial
Function / homology
Function and homology information


protein histidine kinase activity / histidine kinase / phosphorelay signal transduction system / transmembrane transporter activity / transmembrane transport / response to antibiotic / ATP hydrolysis activity / ATP binding / plasma membrane
Similarity search - Function
ABC transporter permease protein, BceB-type / : / : / MacB, ATP-binding domain / ABC3 transporter permease protein domain / FtsX-like permease family / Signal transduction histidine kinase-related protein, C-terminal / Histidine kinase domain / Histidine kinase domain profile. / Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase ...ABC transporter permease protein, BceB-type / : / : / MacB, ATP-binding domain / ABC3 transporter permease protein domain / FtsX-like permease family / Signal transduction histidine kinase-related protein, C-terminal / Histidine kinase domain / Histidine kinase domain profile. / Histidine kinase-, DNA gyrase B-, and HSP90-like ATPase / Histidine kinase-like ATPases / Histidine kinase/HSP90-like ATPase / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / Histidine kinase/HSP90-like ATPase superfamily / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Chem-6OU / OLEIC ACID / PALMITIC ACID / Bacitracin export ATP-binding protein BceA / Bacitracin export permease protein BceB / Sensor protein BceS
Similarity search - Component
Biological speciesBacillus subtilis subsp. subtilis str. 168 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsGeorge, N.L. / Orlando, B.J.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM146721 United States
CitationJournal: Nat Commun / Year: 2023
Title: Architecture of a complete Bce-type antimicrobial peptide resistance module.
Authors: Natasha L George / Benjamin J Orlando /
Abstract: Gram-positive bacteria synthesize and secrete antimicrobial peptides that target the essential process of peptidoglycan synthesis. These antimicrobial peptides not only regulate the dynamics of ...Gram-positive bacteria synthesize and secrete antimicrobial peptides that target the essential process of peptidoglycan synthesis. These antimicrobial peptides not only regulate the dynamics of microbial communities but are also of clinical importance as exemplified by peptides such as bacitracin, vancomycin, and daptomycin. Many gram-positive species have evolved specialized antimicrobial peptide sensing and resistance machinery known as Bce modules. These modules are membrane protein complexes formed by an unusual Bce-type ABC transporter interacting with a two-component system sensor histidine kinase. In this work, we provide the first structural insight into how the membrane protein components of these modules assemble into a functional complex. A cryo-EM structure of an entire Bce module revealed an unexpected mechanism of complex assembly, and extensive structural flexibility in the sensor histidine kinase. Structures of the complex in the presence of a non-hydrolysable ATP analog reveal how nucleotide binding primes the complex for subsequent activation. Accompanying biochemical data demonstrate how the individual membrane protein components of the complex exert functional control over one another to create a tightly regulated enzymatic system.
History
DepositionFeb 8, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 21, 2023Provider: repository / Type: Initial release
Revision 1.1Jul 12, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _citation_author.identifier_ORCID
Revision 1.2Jun 19, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Bacitracin export permease protein BceB
B: Bacitracin export ATP-binding protein BceA
C: Bacitracin export ATP-binding protein BceA
D: Sensor protein BceS
E: Sensor protein BceS
hetero molecules


Theoretical massNumber of molelcules
Total (without water)210,3589
Polymers208,3835
Non-polymers1,9754
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Bacitracin export ... , 2 types, 3 molecules ABC

#1: Protein Bacitracin export permease protein BceB


Mass: 72262.109 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bacillus subtilis subsp. subtilis str. 168 (bacteria)
Gene: bceB, barD, ytsD, BSU30370 / Production host: Escherichia coli (E. coli) / References: UniProt: O34741
#2: Protein Bacitracin export ATP-binding protein BceA


Mass: 29248.377 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bacillus subtilis subsp. subtilis str. 168 (bacteria)
Gene: bceA, barC, ytsC, BSU30380 / Production host: Escherichia coli (E. coli) / References: UniProt: O34697

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Protein , 1 types, 2 molecules DE

#3: Protein Sensor protein BceS


Mass: 38811.898 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bacillus subtilis subsp. subtilis str. 168 (bacteria)
Gene: bceS, barB, ytsB, BSU30390 / Production host: Escherichia coli (E. coli) / References: UniProt: O35044, histidine kinase

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Non-polymers , 3 types, 4 molecules

#4: Chemical ChemComp-PLM / PALMITIC ACID


Mass: 256.424 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C16H32O2
#5: Chemical ChemComp-6OU / [(2~{R})-1-[2-azanylethoxy(oxidanyl)phosphoryl]oxy-3-hexadecanoyloxy-propan-2-yl] (~{Z})-octadec-9-enoate


Mass: 717.996 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C39H76NO8P / Comment: phospholipid*YM
#6: Chemical ChemComp-OLA / OLEIC ACID


Mass: 282.461 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C18H34O2

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Details

Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: BceAB-S / Type: COMPLEX
Details: A membrane protein complex formed by the BceAB transporter and BceS histidine kinase
Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 0.167 MDa / Experimental value: NO
Source (natural)Organism: Bacillus subtilis subsp. subtilis str. 168 (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 8 / Details: 150mM NaCl, 25mM Tris-HCl, 0.005% LMNG
Buffer component
IDConc.NameFormulaBuffer-ID
1150 mMsodium chlorideNaCl1
225 mMTris1
30.005 %LMNG1
SpecimenConc.: 6.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R2/2
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 2500 nm / Nominal defocus min: 700 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 60.5 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)
EM imaging opticsEnergyfilter name: GIF Bioquantum / Energyfilter slit width: 20 eV

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Processing

SoftwareName: PHENIX / Version: 1.19.2_4158: / Classification: refinement
EM software
IDNameVersionCategory
4cryoSPARC3.3.1CTF correction
10cryoSPARC3.3.1initial Euler assignment
11cryoSPARC3.3.1final Euler assignment
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 186936 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00514708
ELECTRON MICROSCOPYf_angle_d0.63519777
ELECTRON MICROSCOPYf_dihedral_angle_d8.2822019
ELECTRON MICROSCOPYf_chiral_restr0.0452246
ELECTRON MICROSCOPYf_plane_restr0.0032467

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