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- PDB-9n2d: Cryo-EM structure of an extended F. johnsoniae BAM complex, compo... -

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Basic information

Entry
Database: PDB / ID: 9n2d
TitleCryo-EM structure of an extended F. johnsoniae BAM complex, composite map
Components
  • Bam A
  • Bam D
  • Bam G
  • Bam H
  • Bam M
  • Bam P
KeywordsMEMBRANE PROTEIN / BAM complex / BamA / BamD / BamG / BamH / BamM / BamP / outer-membrane proteins / OMP
Function / homology
Function and homology information


membrane assembly / peptidyl-prolyl cis-trans isomerase activity / cell outer membrane / calcium ion binding
Similarity search - Function
Protein of unknown function DUF4270 / Domain of unknown function (DUF4270) / TSP type-3 repeat / Outer membrane protein assembly factor BamD / Outer membrane lipoprotein BamD-like / Outer membrane lipoprotein / Outer membrane protein assembly factor BamA / POTRA domain, BamA/TamA-like / Surface antigen variable number repeat / POTRA domain ...Protein of unknown function DUF4270 / Domain of unknown function (DUF4270) / TSP type-3 repeat / Outer membrane protein assembly factor BamD / Outer membrane lipoprotein BamD-like / Outer membrane lipoprotein / Outer membrane protein assembly factor BamA / POTRA domain, BamA/TamA-like / Surface antigen variable number repeat / POTRA domain / POTRA domain profile. / Bacterial surface antigen (D15) / Omp85 superfamily domain / Peptidyl-prolyl cis-trans isomerase domain superfamily / Prokaryotic membrane lipoprotein lipid attachment site profile. / Tetratricopeptide-like helical domain superfamily
Similarity search - Domain/homology
DIACYL GLYCEROL / Chem-JSG / alpha-D-mannopyranose / PALMITIC ACID / PHOSPHATIDYLETHANOLAMINE / DNA uptake lipoprotein-like protein / CarboxypepD_reg-like domain-containing protein / Surface antigen (D15) / Long-chain fatty acid transport protein / Hypothetical lipoprotein / Hypothetical lipoprotein
Similarity search - Component
Biological speciesFlavobacterium johnsoniae UW101 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.7 Å
AuthorsDeme, J.C. / Lea, S.M.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)CCR Core Funding for Lea Group United States
CitationJournal: To Be Published
Title: An extended BAM complex in the Bacteroidota
Authors: Liu, X. / Orenday Tapia, L. / Deme, J.C. / Lea, S.M. / Berks, B.C.
History
DepositionJan 28, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 9, 2025Provider: repository / Type: Initial release
Revision 1.0Jul 9, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Jul 9, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Jul 9, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Aug 13, 2025Group: Data collection / Structure summary
Category: em_admin / entity ...em_admin / entity / pdbx_contact_author / struct_keywords
Item: _em_admin.last_update / _entity.pdbx_description ..._em_admin.last_update / _entity.pdbx_description / _pdbx_contact_author.email / _struct_keywords.text
Revision 1.1Aug 13, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Experimental summary / Structure summary / Data content type: EM metadata / EM metadata / EM metadata / Category: em_admin / entity / struct_keywords / Data content type: EM metadata / EM metadata / EM metadata
Item: _em_admin.last_update / _entity.pdbx_description / _struct_keywords.text

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
F: Bam D
A: Bam A
C: Bam H
B: Bam G
D: Bam M
E: Bam P
hetero molecules


Theoretical massNumber of molelcules
Total (without water)312,23621
Polymers305,5766
Non-polymers6,66015
Water28816
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 6 types, 6 molecules FACBDE

#1: Protein Bam D


Mass: 30219.377 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Flavobacterium johnsoniae UW101 (bacteria)
References: UniProt: A5FE81
#2: Protein Bam A


Mass: 101490.320 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Flavobacterium johnsoniae UW101 (bacteria)
References: UniProt: A5FJ90
#3: Protein Bam H


Mass: 57094.242 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Flavobacterium johnsoniae UW101 (bacteria)
References: UniProt: A5FLQ8
#4: Protein Bam G


Mass: 44458.980 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Flavobacterium johnsoniae UW101 (bacteria)
References: UniProt: A5FK27
#5: Protein Bam M


Mass: 43899.273 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Flavobacterium johnsoniae UW101 (bacteria)
References: UniProt: A5FNX9
#6: Protein Bam P


Mass: 28413.742 Da / Num. of mol.: 1 / Source method: isolated from a natural source
Source: (natural) Flavobacterium johnsoniae UW101 (bacteria)
References: UniProt: A5FJ21

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Sugars , 3 types, 3 molecules

#7: Polysaccharide alpha-D-glucopyranuronic acid-(1-2)-[alpha-D-mannopyranose-(1-4)]beta-D-galactopyranose


Type: oligosaccharide / Mass: 518.421 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpAa1-2[DManpa1-4]DGalpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/3,3,2/[a2112h-1b_1-5][a2122A-1a_1-5][a1122h-1a_1-5]/1-2-3/a2-b1_a4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-Galp]{[(2+1)][b-D-GlcpA]{}[(4+1)][a-D-Manp]{}}LINUCSPDB-CARE
#8: Polysaccharide alpha-D-glucopyranuronic acid-(1-2)-beta-D-galactopyranose


Type: oligosaccharide / Mass: 356.280 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpAa1-2DGalpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2112h-1b_1-5][a2122A-1a_1-5]/1-2/a2-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-Galp]{[(2+1)][b-D-GlcpA]{}}LINUCSPDB-CARE
#12: Sugar ChemComp-MAN / alpha-D-mannopyranose / alpha-D-mannose / D-mannose / mannose


Type: D-saccharide, alpha linking / Mass: 180.156 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H12O6
IdentifierTypeProgram
DManpaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
a-D-mannopyranoseCOMMON NAMEGMML 1.0
a-D-ManpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
ManSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 6 types, 28 molecules

#9: Chemical ChemComp-DGA / DIACYL GLYCEROL


Mass: 625.018 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C39H76O5
#10: Chemical ChemComp-JSG / (2~{R},4~{R},5~{R},6~{R})-6-[(1~{R})-1,2-bis(oxidanyl)ethyl]-2-[(2~{R},4~{R},5~{R},6~{R})-6-[(1~{R})-1,2-bis(oxidanyl)ethyl]-5-[(2~{S},3~{S},4~{R},5~{R},6~{R})-6-[(1~{S})-1,2-bis(oxidanyl)ethyl]-4-[(2~{R},3~{S},4~{R},5~{S},6~{R})-6-[(1~{S})-2-[(2~{S},3~{S},4~{S},5~{S},6~{R})-6-[(1~{S})-1,2-bis(oxidanyl)ethyl]-3,4,5-tris(oxidanyl)oxan-2-yl]oxy-1-oxidanyl-ethyl]-3,4-bis(oxidanyl)-5-phosphonooxy-oxan-2-yl]oxy-3-oxidanyl-5-phosphonooxy-oxan-2-yl]oxy-2-carboxy-2-[[(2~{R},3~{S},4~{R},5~{R},6~{R})-5-[[(3~{R})-3-dodecanoyloxytetradecanoyl]amino]-6-[[(2~{R},3~{S},4~{R},5~{R},6~{R})-3-oxidanyl-5-[[(3~{R})-3-oxidanyltetradecanoyl]amino]-4-[(3~{R})-3-oxidanyltetradecanoyl]oxy-6-phosphonooxy-oxan-2-yl]methoxy]-3-phosphonooxy-4-[(3~{R})-3-tetradecanoyloxytetradecanoyl]oxy-oxan-2-yl]methoxy]oxan-4-yl]oxy-4,5-bis(oxidanyl)oxane-2-carboxylic acid


Mass: 2975.178 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C131H240N2O63P4
#11: Chemical ChemComp-PTY / PHOSPHATIDYLETHANOLAMINE


Mass: 734.039 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C40H80NO8P / Comment: phospholipid*YM
#13: Chemical ChemComp-PLM / PALMITIC ACID


Mass: 256.424 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C16H32O2
#14: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: Ca
#15: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 16 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN
Has protein modificationY

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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: BAM complex / Type: COMPLEX / Entity ID: #1-#3, #5-#6 / Source: NATURAL
Source (natural)Organism: Flavobacterium johnsoniae UW101 (bacteria)
Buffer solutionpH: 8
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 500 nm
Image recordingElectron dose: 60.3 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k)

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Processing

EM softwareName: PHENIX / Version: dev_5533 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 55796 / Symmetry type: POINT
RefinementHighest resolution: 2.7 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00318875
ELECTRON MICROSCOPYf_angle_d0.68925532
ELECTRON MICROSCOPYf_dihedral_angle_d15.0247144
ELECTRON MICROSCOPYf_chiral_restr0.0492774
ELECTRON MICROSCOPYf_plane_restr0.0055550

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