Quantifying the heterogeneity of macromolecular machines by mass photometry
Abstract: Sample purity is central to in vitro studies of protein function and regulation, and to the efficiency and success of structural studies using techniques such as x-ray crystallography and cryo-electron microscopy (cryo-EM). Here, we show that mass photometry (MP) can accurately characterize the heterogeneity of a sample using minimal material with high resolution within a matter of minutes. To benchmark our approach, we use negative stain electron microscopy (nsEM), a popular method for EM sample screening. We include typical workflows developed for structure determination that involve multi-step purification of a multi-subunit ubiquitin ligase and chemical cross-linking steps. When assessing the integrity and stability of large molecular complexes such as the proteasome, we detect and quantify assemblies invisible to nsEM. Our results illustrate the unique advantages of MP over current methods for rapid sample characterization, prioritization and workflow optimization
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Anmerkungen
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Nature communications. - 11 (2020) , 1772, ISSN: 2041-1723
- Ereignis
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Veröffentlichung
- (wo)
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Freiburg
- (wer)
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Universität
- (wann)
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2020
- Urheber
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Sonn-Segev, Adar
Belacic, Katarina
Bodrug, Tatyana
Young, Gavin
VanderLinden, Ryan T.
Schulman, Brenda A.
Schimpf, Johannes
Friedrich, Thorsten
Dip, Phat Vinh
Schwartz, Thomas
Bauer, Benedikt
Peters, Jan-Michael
Struwe, Weston B.
Benesch, Justin L. P.
Brown, Nicholas G.
Haselbach, David
Kukura, Philipp
- Beteiligte Personen und Organisationen
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Institute of Biochemistry, Molecular Bioenergetics
- DOI
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10.1038/s41467-020-15642-w
- URN
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urn:nbn:de:bsz:25-freidok-1741366
- Rechteinformation
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Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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14.08.2025, 10:44 MESZ
Datenpartner
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Beteiligte
- Sonn-Segev, Adar
- Belacic, Katarina
- Bodrug, Tatyana
- Young, Gavin
- VanderLinden, Ryan T.
- Schulman, Brenda A.
- Schimpf, Johannes
- Friedrich, Thorsten
- Dip, Phat Vinh
- Schwartz, Thomas
- Bauer, Benedikt
- Peters, Jan-Michael
- Struwe, Weston B.
- Benesch, Justin L. P.
- Brown, Nicholas G.
- Haselbach, David
- Kukura, Philipp
- Institute of Biochemistry, Molecular Bioenergetics
- Universität
Entstanden
- 2020