Protein assemblies ejected directly from native membranes yield complexes for mass spectrometry

Membrane proteins reside in lipid bilayers and are typically extracted from this environment for study, which often compromises their integrity. In this work, we ejected intact assemblies from membranes, without chemical disruption, and used mass spectrometry to define their composition. From outer...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2018-11, Vol.362 (6416), p.829-834
Hauptverfasser: Chorev, Dror S, Baker, Lindsay A, Wu, Di, Beilsten-Edmands, Victoria, Rouse, Sarah L, Zeev-Ben-Mordehai, Tzviya, Jiko, Chimari, Samsudin, Firdaus, Gerle, Christoph, Khalid, Syma, Stewart, Alastair G, Matthews, Stephen J, Grünewald, Kay, Robinson, Carol V
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container_issue 6416
container_start_page 829
container_title Science (American Association for the Advancement of Science)
container_volume 362
creator Chorev, Dror S
Baker, Lindsay A
Wu, Di
Beilsten-Edmands, Victoria
Rouse, Sarah L
Zeev-Ben-Mordehai, Tzviya
Jiko, Chimari
Samsudin, Firdaus
Gerle, Christoph
Khalid, Syma
Stewart, Alastair G
Matthews, Stephen J
Grünewald, Kay
Robinson, Carol V
description Membrane proteins reside in lipid bilayers and are typically extracted from this environment for study, which often compromises their integrity. In this work, we ejected intact assemblies from membranes, without chemical disruption, and used mass spectrometry to define their composition. From outer membranes, we identified a chaperone-porin association and lipid interactions in the β-barrel assembly machinery. We observed efflux pumps bridging inner and outer membranes, and from inner membranes we identified a pentameric pore of TonB, as well as the protein-conducting channel SecYEG in association with F F adenosine triphosphate (ATP) synthase. Intact mitochondrial membranes from yielded respiratory complexes and fatty acid-bound dimers of the ADP (adenosine diphosphate)/ATP translocase (ANT-1). These results highlight the importance of native membrane environments for retaining small-molecule binding, subunit interactions, and associated chaperones of the membrane proteome.
doi_str_mv 10.1126/science.aau0976
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source American Association for the Advancement of Science; Jstor Complete Legacy; MEDLINE
subjects Adenine Nucleotide Translocator 1 - chemistry
Adenine Nucleotide Translocator 1 - metabolism
Adenosine
Adenosine diphosphate
Adenosine triphosphate
Animals
Assemblies
ATP
Bacteria
Bacterial Outer Membrane Proteins - chemistry
Bacterial Outer Membrane Proteins - metabolism
Bacterial Proteins - chemistry
Bacterial Proteins - metabolism
Bos taurus
Cattle
Chaperones
Dimers
Disruption
E coli
Efflux
Ejection
Electron microscopy
Escherichia coli
Escherichia coli Proteins - chemistry
Escherichia coli Proteins - metabolism
Inner membranes
Lipid bilayers
Lipid Bilayers - chemistry
Lipid Bilayers - metabolism
Lipids
Mass Spectrometry
Mass spectroscopy
Membrane proteins
Membrane Proteins - chemistry
Membrane Proteins - metabolism
Membrane vesicles
Membranes
Mitochondria
Mitochondrial Membranes - chemistry
Mitochondrial Membranes - metabolism
Mitochondrial Proton-Translocating ATPases - chemistry
Mitochondrial Proton-Translocating ATPases - metabolism
Molecular Chaperones - chemistry
Molecular Chaperones - metabolism
Organic chemistry
Outer membranes
Porins - chemistry
Porins - metabolism
Protein Conformation, beta-Strand
Proteins
Proteome - chemistry
Proteome - metabolism
Proteomes
Scientific imaging
SEC Translocation Channels - chemistry
SEC Translocation Channels - metabolism
Stoichiometry
Translocase
title Protein assemblies ejected directly from native membranes yield complexes for mass spectrometry
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