Biological Assembly 1  

 3D View: Structure

Global Symmetry: Cyclic - C3  (3D View)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: mass spectrometry

Macromolecule Content

• Total Structure Weight: 115.01 kDa 
• Atom Count: 8142 
• Residue Count: 1038 
• Unique protein chains: 1

7JZ3

Osmoporin OmpC from E.coli K12

• DOI: 10.2210/pdb7JZ3/pdb
• EMDataResource: EMD-22529

• Classification: TRANSPORT PROTEIN
• Organism(s): Escherichia coli K-12
• Mutation(s): No 


• Deposited: 2020-09-01 Released: 2021-01-20 
• Deposition Author(s): Lyu, M., Su, C., Morgan, C.E., Bolla, J.R., Robinson, C.V., Yu, E.W.
• Funding Organization(s): National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)

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Experimental Data Snapshot

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

Literature

A 'Build and Retrieve' methodology to simultaneously solve cryo-EM structures of membrane proteins.

Su, C.C., Lyu, M., Morgan, C.E., Bolla, J.R., Robinson, C.V., Yu, E.W.

(2021) Nat Methods 18: 69-75

• PubMed: 33408407 
• DOI: 10.1038/s41592-020-01021-2
• Primary Citation of Related Structures:  
  7JZ2, 7JZ6, 7JZ3, 7JZH, 6WU0, 6WTI, 6WU6, 6WTZ


• PubMed Abstract: 
  

Single-particle cryo-electron microscopy (cryo-EM) has become a powerful technique in the field of structural biology. However, the inability to reliably produce pure, homogeneous membrane protein samples hampers the progress of their structural determination. Here, we develop a bottom-up iterative method, Build and Retrieve (BaR), that enables the identification and determination of cryo-EM structures of a variety of inner and outer membrane proteins, including membrane protein complexes of different sizes and dimensions, from a heterogeneous, impure protein sample. We also use the BaR methodology to elucidate structural information from Escherichia coli K12 crude membrane and raw lysate. The findings demonstrate that it is possible to solve high-resolution structures of a number of relatively small (<100 kDa) and less abundant (<10%) unidentified membrane proteins within a single, heterogeneous sample. Importantly, these results highlight the potential of cryo-EM for systems structural proteomics.

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Organizational Affiliation: 

Department of Pharmacology, Case Western Reserve University School of Medicine, Cleveland, OH, USA. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Outer membrane protein C	A, B, C	346	Escherichia coli K-12	Mutation(s): 0
Membrane protein Mpstruc	Group:  TRANSMEMBRANE PROTEINS: BETA-BARREL		Sub Group:  Beta-Barrel Membrane Proteins: Porins and Relatives	Protein:  OmpC Osmoporin
Find proteins for C6K7N1 (Escherichia coli) Explore C6K7N1  Go to UniProtKB:  C6K7N1

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2020-09-01 
• Released Date: 2021-01-20 
Deposition Author(s): Lyu, M., Su, C., Morgan, C.E., Bolla, J.R., Robinson, C.V., Yu, E.W.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)	United States	--

Revision History 

• Version 1.0: 2021-01-20
  Type: Initial release