[English] 日本語
Yorodumi
- PDB-8the: Cryo-EM structure of Pseudomonas aeruginosa TonB-dependent transp... -

+
Open data


ID or keywords:

Loading...

-
Basic information

Entry
Database: PDB / ID: 8the
TitleCryo-EM structure of Pseudomonas aeruginosa TonB-dependent transporter PhuR in complex with synthetic antibody and heme
Components
  • (Synthetic Antibody ...) x 2
  • Heme/hemoglobin uptake outer membrane receptor PhuR
KeywordsMEMBRANE PROTEIN / beta barrel / outer membrane protein / heme binding protein / heme transport
Function / homology
Function and homology information


heme transport / siderophore transmembrane transport / heme transmembrane transporter activity / siderophore uptake transmembrane transporter activity / outer membrane / cell outer membrane / cellular response to iron ion
Similarity search - Function
TonB-dependent haem/haemoglobin receptor / TonB-dependent haemoglobin/transferrin/lactoferrin receptor / Vitamin B12 transporter BtuB-like / TonB-dependent receptor-like, beta-barrel / TonB dependent receptor-like, beta-barrel / TonB-dependent receptor, plug domain superfamily / TonB-dependent receptor, plug domain / TonB-dependent receptor-like, beta-barrel domain superfamily / TonB-dependent Receptor Plug Domain
Similarity search - Domain/homology
Chem-CTQ / PROTOPORPHYRIN IX CONTAINING FE / Heme/hemoglobin uptake outer membrane receptor PhuR
Similarity search - Component
Biological speciesPseudomonas aeruginosa (bacteria)
Homo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.5 Å
AuthorsKnejski, P. / Erramilli, S.K. / Kossiakoff, A.A.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R01GM117372 United States
CitationJournal: Structure / Year: 2024
Title: Chaperone-assisted cryo-EM structure of P. aeruginosa PhuR reveals molecular basis for heme binding.
Authors: Paweł P Knejski / Satchal K Erramilli / Anthony A Kossiakoff /
Abstract: Pathogenic bacteria, such as Pseudomonas aeruginosa, depend on scavenging heme for the acquisition of iron, an essential nutrient. The TonB-dependent transporter (TBDT) PhuR is the major heme uptake ...Pathogenic bacteria, such as Pseudomonas aeruginosa, depend on scavenging heme for the acquisition of iron, an essential nutrient. The TonB-dependent transporter (TBDT) PhuR is the major heme uptake protein in P. aeruginosa clinical isolates. However, a comprehensive understanding of heme recognition and TBDT transport mechanisms, especially PhuR, remains limited. In this study, we employed single-particle cryogenic electron microscopy (cryo-EM) and a phage display-generated synthetic antibody (sAB) as a fiducial marker to enable the determination of a high-resolution (2.5 Å) structure of PhuR with a bound heme. Notably, the structure reveals iron coordination by Y529 on a conserved extracellular loop, shedding light on the role of tyrosine in heme binding. Biochemical assays and negative-stain EM demonstrated that the sAB specifically targets the heme-bound state of PhuR. These findings provide insights into PhuR's heme binding and offer a template for developing conformation-specific sABs against outer membrane proteins (OMPs) for structure-function investigations.
History
DepositionJul 15, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jan 31, 2024Provider: repository / Type: Initial release
Revision 1.1Feb 21, 2024Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title ..._citation.pdbx_database_id_PubMed / _citation.title / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Apr 17, 2024Group: Database references / Category: citation / Item: _citation.journal_volume / _citation.page_first

-
Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

-
Assembly

Deposited unit
A: Heme/hemoglobin uptake outer membrane receptor PhuR
H: Synthetic Antibody Heavy Chain
L: Synthetic Antibody Light Chain
hetero molecules


Theoretical massNumber of molelcules
Total (without water)137,7445
Polymers135,1083
Non-polymers2,6352
Water1,45981
1


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

-
Components

-
Protein , 1 types, 1 molecules A

#1: Protein Heme/hemoglobin uptake outer membrane receptor PhuR


Mass: 86370.320 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Pseudomonas aeruginosa (bacteria) / Gene: phuR, PA4710 / Production host: Escherichia coli (E. coli) / References: UniProt: Q9HV88

-
Antibody , 2 types, 2 molecules HL

#2: Antibody Synthetic Antibody Heavy Chain /


Mass: 25525.445 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)
#3: Antibody Synthetic Antibody Light Chain /


Mass: 23212.715 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Production host: Escherichia coli (E. coli)

-
Non-polymers , 3 types, 83 molecules

#4: Chemical ChemComp-HEM / PROTOPORPHYRIN IX CONTAINING FE / HEME / Heme B


Mass: 616.487 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H32FeN4O4 / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-CTQ / (2~{R},4~{R},5~{S},6~{S})-6-[(1~{R})-1,2-bis(oxidanyl)ethyl]-2-[[(2~{R},3~{S},4~{S},5~{R},6~{S})-5-[[(3~{R})-3-dodecanoyloxytetradecanoyl]amino]-6-[[(2~{R},3~{R},4~{R},5~{S},6~{S})-3-oxidanyl-5-[[(3~{R})-3-oxidanyltetradecanoyl]amino]-4-[(3~{R})-3-oxidanyltetradecanoyl]oxy-6-phosphonooxy-oxan-2-yl]methoxy]-3-phosphonooxy-4-[(3~{S})-3-tetradecanoyloxytetradecanoyl]oxy-oxan-2-yl]methoxy]-4,5-bis(oxidanyl)oxane-2-carboxylic acid


Mass: 2018.542 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C102H190N2O32P2
#6: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 81 / Source method: isolated from a natural source / Formula: H2O

-
Details

Has ligand of interestY

-
Experimental details

-
Experiment

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

-
Sample preparation

ComponentName: Heme bound P. aeruginosa PhuR with bound synthetic antibody
Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Pseudomonas aeruginosa (bacteria)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
SpecimenConc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K

-
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 FIELDBright-field microscopy / Nominal defocus max: 2500 nm / Nominal defocus min: 900 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of real images: 5031

-
Processing

EM software
IDNameVersionCategory
1RELIONparticle selection
4RELIONCTF correction
7Cootmodel fitting
9PHENIXmodel refinement
10cryoSPARC3.3initial Euler assignment
11cryoSPARC3.3final Euler assignment
13cryoSPARC3.33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 292512 / Symmetry type: POINT
Atomic model buildingSource name: AlphaFold / Type: in silico model

+
About Yorodumi

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi

Thousand views of thousand structures

  • Yorodumi is a browser for structure data from EMDB, PDB, SASBDB, etc.
  • This page is also the successor to EM Navigator detail page, and also detail information page/front-end page for Omokage search.
  • The word "yorodu" (or yorozu) is an old Japanese word meaning "ten thousand". "mi" (miru) is to see.

Related info.:EMDB / PDB / SASBDB / Comparison of 3 databanks / Yorodumi Search / Aug 31, 2016. New EM Navigator & Yorodumi / Yorodumi Papers / Jmol/JSmol / Function and homology information / Changes in new EM Navigator and Yorodumi

Read more