Current Genetics

, Volume 64, Issue 2, pp 469–478 | Cite as

Screening for amyloid proteins in the yeast proteome

  • Tatyana A. Ryzhova
  • Julia V. Sopova
  • Sergey P. Zadorsky
  • Vera A. Siniukova
  • Aleksandra V. Sergeeva
  • Svetlana A. Galkina
  • Anton A. Nizhnikov
  • Aleksandr A. Shenfeld
  • Kirill V. Volkov
  • Alexey P. GalkinEmail author
Original Article


The search for novel pathological and functional amyloids represents one of the most important tasks of contemporary biomedicine. Formation of pathological amyloid fibrils in the aging brain causes incurable neurodegenerative disorders such as Alzheimer’s, Parkinson’s Huntington’s diseases. At the same time, a set of amyloids regulates vital processes in archaea, prokaryotes and eukaryotes. Our knowledge of the prevalence and biological significance of amyloids is limited due to the lack of universal methods for their identification. Here, using our original method of proteomic screening PSIA–LC–MALDI, we identified a number of proteins that form amyloid-like detergent-resistant aggregates in Saccharomyces cerevisiae. We revealed in yeast strains of different origin known yeast prions, prion-associated proteins, and a set of proteins whose amyloid properties were not shown before. A substantial number of the identified proteins are cell wall components, suggesting that amyloids may play important roles in the formation of this extracellular protective sheath. Two proteins identified in our screen, Gas1 and Ygp1, involved in biogenesis of the yeast cell wall, were selected for detailed analysis of amyloid properties. We show that Gas1 and Ygp1 demonstrate amyloid properties both in vivo in yeast cells and using the bacteria-based system C-DAG. Taken together, our data show that this proteomic approach is very useful for identification of novel amyloids.


Amyloid Prion Yeast Proteomic screen Gas1 Ygp1 



The authors acknowledge Dr. A.A. Aleksandrov for critical reading of the manuscript. Special thanks go to Dr. A. Hochschild for providing the bacterial C-DAG system. The authors acknowledge St. Petersburg State University for opportunity to use facilities of the Research Resource Center for Molecular and Cell Technologies and the Resource Centers “CHROMAS” of SPbSU. This work was partially supported by the grant of SPbSU to A.P.G. and by the Russian Foundation for Basic Research (14-04-01463to A.P.G. and 16-34-60153 to A.A.N). The experiments on proteomic screening were supported by the Russian Science Foundation 14-50-00069 to SPbSU.

Supplementary material

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Tatyana A. Ryzhova
    • 1
    • 2
  • Julia V. Sopova
    • 1
    • 2
  • Sergey P. Zadorsky
    • 1
    • 2
  • Vera A. Siniukova
    • 2
  • Aleksandra V. Sergeeva
    • 1
  • Svetlana A. Galkina
    • 2
  • Anton A. Nizhnikov
    • 1
    • 2
    • 3
  • Aleksandr A. Shenfeld
    • 1
    • 2
  • Kirill V. Volkov
    • 4
  • Alexey P. Galkin
    • 1
    • 2
    Email author
  1. 1.Vavilov Institute of General Genetics, St. Petersburg BranchRussian Academy of SciencesSt. PetersburgRussian Federation
  2. 2.Department of Genetics and BiotechnologySt. Petersburg State UniversitySt. PetersburgRussian Federation
  3. 3.All-Russia Research Institute for Agricultural MicrobiologySt. PetersburgRussian Federation
  4. 4.Research Park, Research Resource Center “Molecular and Cell Technologies”St. Petersburg State UniversitySt. PetersburgRussian Federation

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