Structure of the ciliary axoneme at nanometer resolution reconstructed by TYGRESS

Kangkang Song, Zhiguo Shang, Xiaofeng Fu, Xiaochu Lou, Nikolaus Grigorieff, Daniela Nicastro

Research output: Contribution to journalArticlepeer-review


The resolution of subtomogram averages calculated from cryo-electron tomograms (cryo-ET) of crowded cellular environments is often limited due to signal loss in, and misalignment of the subtomograms. In contrast, single-particle cryo-electron microcopy (SP-cryo-EM) routinely reaches near-atomic resolution of isolated complexes. We developed a novel hybrid-method called “TomographY-Guided 3D REconstruction of Subcellular Structures” (TYGRESS) that combines cryo-ET with SP-cryo-EM to achieve close-to-nanometer resolution of complexes inside crowded environments. Using TYGRESS, we determined the native 3D structures of the intact ciliary axoneme with up to 12 Å resolution. These results reveal many structures and details that were not visible by cryo-ET. TYGRESS is generally applicable to cellular complexes that are amenable to subtomogram averaging, bringing us a step closer to (pseudo-)atomic models of cells. One Sentence Summary A hybrid cryo-electron microscopy method reveals subcellular structures at unprecedented resolution.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Jul 6 2018

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)
  • Immunology and Microbiology(all)
  • Neuroscience(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

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