Evidence map›Paper›PMID 27432965›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Flexible, symmetry-directed approach to assembling protein cages.

Aaron Sciore, Min Su, Philipp Koldewey, Joseph D Eschweiler, Kelsey A Diffley, Brian M Linhares, Brandon T Ruotolo, James C A Bardwell, Georgios Skiniotis, E Neil G Marsh

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed
7.5field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

35 citing papers in PubMed, 101 citations in OpenAlex.

  1. Article
  2. Review
  3. Pleomorphism in Wild-Type and Engineered PP7 Virus-Like Particles.Small (Weinheim an der Bergstrasse, Germany) · 2025
    Article
  4. Inverse Design of DNA-Programmable Protein Colloidal Crystals.Journal of the American Chemical Society · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Review
  10. Protein Assembly by Design.Chemical reviews · 2021
    Review
  11. Article
  12. Artificial Organelles: Towards Adding or Restoring Intracellular Activity.Chembiochem : a European journal of chemical biology · 2021
    Review
  13. Generation of ordered protein assemblies using rigid three-body fusion.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  14. Review
  15. Review
  16. Review
  17. Article
  18. Article
  19. A complete rule set for designing symmetry combination materials from protein molecules.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 1 institution in 1 country.

Aaron ScioreDepartment of Chemistry, University of Michigan, Ann Arbor, MI 48109;
Min SuLife Sciences Institute, University of Michigan, Ann Arbor, MI 48109;
Philipp KoldeweyDepartment of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109;
Joseph D EschweilerDepartment of Chemistry, University of Michigan, Ann Arbor, MI 48109;
Kelsey A DiffleyDepartment of Chemistry, University of Michigan, Ann Arbor, MI 48109;
Brian M LinharesLife Sciences Institute, University of Michigan, Ann Arbor, MI 48109;
Brandon T RuotoloDepartment of Chemistry, University of Michigan, Ann Arbor, MI 48109;
James C A BardwellDepartment of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI 48109; Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109; Howard Hughes Medical Institute, University of Michigan, Ann Arbor, MI 48109.
Georgios SkiniotisLife Sciences Institute, University of Michigan, Ann Arbor, MI 48109; Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109;
E Neil G MarshDepartment of Chemistry, University of Michigan, Ann Arbor, MI 48109; Department of Biological Chemistry, University of Michigan, Ann Arbor, MI 48109; nmarsh@umich.edu.
University of Michigan–Ann Arbor · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The assembly of individual protein subunits into large-scale symmetrical structures is widespread in nature and confers new biological properties. Engineered protein assemblies have potential applications in nanotechnology and medicine; however, a major challenge in engineering assemblies de novo has been to design interactions between the protein subunits so that they specifically assemble into the desired structure. Here we demonstrate a simple, generalizable approach to assemble proteins into cage-like structures that uses short de novo designed coiled-coil domains to mediate assembly. We assembled eight copies of a C3-symmetric trimeric esterase into a well-defined octahedral protein cage by appending a C4-symmetric coiled-coil domain to the protein through a short, flexible linker sequence, with the approximate length of the linker sequence determined by computational modeling. The structure of the cage was verified using a combination of analytical ultracentrifugation, native electrospray mass spectrometry, and negative stain and cryoelectron microscopy. For the protein cage to assemble correctly, it was necessary to optimize the length of the linker sequence. This observation suggests that flexibility between the two protein domains is important to allow the protein subunits sufficient freedom to assemble into the geometry specified by the combination of C4 and C3 symmetry elements. Because this approach is inherently modular and places minimal requirements on the structural features of the protein building blocks, it could be extended to assemble a wide variety of proteins into structures with different symmetries.

Indexed as

Protein FoldingProtein MultimerizationProtein Structure, SecondaryAmino Acid SequenceCryoelectron MicroscopyMass SpectrometryMicroscopy, Electron, TransmissionModels, MolecularOctamer Transcription Factor-2Octamer Transcription Factor-3ProteinsOctamer Transcription Factor-2Octamer Transcription Factor-3Proteinsanalytical ultracentrifugationcoiled coilscryoelectron microscopynative mass spectrometryprotein design

Identifiers

PMID27432965
PMCPMC4978231
OpenAlexW2483319449

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.