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TitleA 'Build and Retrieve' methodology to simultaneously solve cryo-EM structures of membrane proteins.
Journal, issue, pagesNat Methods, Vol. 18, Issue 1, Page 69-75, Year 2021
Publish dateJan 6, 2021
AuthorsChih-Chia Su / Meinan Lyu / Christopher E Morgan / Jani Reddy Bolla / Carol V Robinson / Edward W Yu /
PubMed AbstractSingle-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 ...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.
External linksNat Methods / PubMed:33408407 / PubMed Central
MethodsEM (single particle)
Resolution2.38 - 3.6 Å
Structure data

EMDB-21897, PDB-6wti:
The Cryo-EM structure of the ubiquinol oxidase from Escherichia coli
Method: EM (single particle) / Resolution: 2.38 Å

EMDB-21900, PDB-6wtz:
Cryo-EM structure of E. Coli OmpF
Method: EM (single particle) / Resolution: 3.15 Å

EMDB-21901, PDB-6wu0:
CryoEM structure of Burkholderia pseudomallei hopanoid biosynthesis-associated RND transporter HpnN
Method: EM (single particle) / Resolution: 3.59 Å

EMDB-21906, PDB-6wu6:
succinate-coenzyme Q reductase
Method: EM (single particle) / Resolution: 3.6 Å

EMDB-22528, PDB-7jz2:
Succinate: quinone oxidoreductase SQR from E.coli K12
Method: EM (single particle) / Resolution: 2.5 Å

EMDB-22529, PDB-7jz3:
Osmoporin OmpC from E.coli K12
Method: EM (single particle) / Resolution: 2.56 Å

EMDB-22530, PDB-7jz6:
The Cryo-EM structure of the Catalase-peroxidase from Escherichia coli
Method: EM (single particle) / Resolution: 2.53 Å

EMDB-22531, PDB-7jzh:
The Cryo-EM structure of the Glutamate decarboxylase from Escherichia coli
Method: EM (single particle) / Resolution: 3.59 Å

Chemicals

ChemComp-HEM:
PROTOPORPHYRIN IX CONTAINING FE

ChemComp-HEO:
HEME O

ChemComp-CU:
COPPER (II) ION

ChemComp-UQ8:
Ubiquinone-8

ChemComp-3PE:
1,2-Distearoyl-sn-glycerophosphoethanolamine / phospholipid*YM

ChemComp-U9V:
pentadecyl(tetradecyl)peroxyanhydride

ChemComp-HOH:
WATER

ChemComp-FES:
FE2/S2 (INORGANIC) CLUSTER

ChemComp-SF4:
IRON/SULFUR CLUSTER

ChemComp-F3S:
FE3-S4 CLUSTER

ChemComp-FAD:
FLAVIN-ADENINE DINUCLEOTIDE / FAD*YM

ChemComp-NA:
Unknown entry

ChemComp-UQ2:
UBIQUINONE-2

Source
  • escherichia coli (E. coli)
  • Escherichia coli K-12 (bacteria)
  • escherichia coli (strain k12) (bacteria)
  • burkholderia pseudomallei mshr346 (bacteria)
  • escherichia coli 908573 (bacteria)
  • escherichia coli (strain se11) (bacteria)
KeywordsOXIDOREDUCTASE / ubiquinol oxidase cytochrome bo3 / membrane protein / outer membrane porin / omp / ompf / PROTEIN TRANSPORT / CryoEM structure / hopanoid transporter HpnN / ELECTRON TRANSPORT / Complex / succinate-coenzyme Q reductase / ELECTRON TRANSPORT/OXIDOREDUCTASE / Succinate: quinone oxidoreductase / SdhA / sdhB / SdhC / SdhD / ELECTRON TRANSPORT-OXIDOREDUCTASE complex / TRANSPORT PROTEIN / Osmoporin OmpC / catalase-peroxidase / LYASE / Glutamate decarboxylase beta

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