8QSR

Cryo-EM structure of the glucose-specific PTS transporter IICB from E. coli in the inward-facing conformation

• PDB DOI: https://doi.org/10.2210/pdb8QSR/pdb
• EM Map EMD-18640: EMDB EMDataResource

• Classification: TRANSPORT PROTEIN
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 
• Membrane Protein: Yes  PDBTM


• Deposited: 2023-10-11 Released: 2024-09-25 
• Deposition Author(s): Roth, P., Fotiadis, D., Jeckelmann, J.-M.
• Funding Organization(s): Swiss National Science Foundation

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.56 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Starting Model: in silico

Literature

Cryo-EM structure of the glucose-specific PTS transporter IICB from E. coli in the inward-open state

Roth, P., Fotiadis, D.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by (software)

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 107.24 kDa 
• Atom Count: 5,808 
• Modelled Residue Count: 766 
• Deposited Residue Count: 998 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PTS system glucose-specific EIICB component	A, B	499	Escherichia coli	Mutation(s): 0  Gene Names: ptsG Membrane Entity: Yes
UniProt
Find proteins for P69786 (Escherichia coli (strain K12)) Explore P69786  Go to UniProtKB:  P69786

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BGC (Subject of Investigation/LOI)	C [auth A], D [auth B]	beta-D-glucopyranose C6 H12 O6 WQZGKKKJIJFFOK-VFUOTHLCSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.56 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	3.2.0
MODEL REFINEMENT	PHENIX

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-09-25 
Deposition Author(s): Roth, P., Fotiadis, D., Jeckelmann, J.-M.

---

Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	184980

Revision History  

• Version 1.0: 2024-09-25
  Type: Initial release