Cited by 106Protein Structure and DynamicsChemical Synthesis and AnalysisBiochemical and Structural Characterization

Understanding a protein fold: The physics, chemistry, and biology of α-helical coiled coils

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Woolfson, Derek N.·2023·Journal of Biological Chemistry

Abstract

Protein science is being transformed by powerful computational methods for structure prediction and design: AlphaFold2 can predict many natural protein structures from sequence, and other AI methods are enabling the de novo design of new structures.This raises a question: how much do we understand the underlying sequence-to-structure/function relationships being captured by these methods?This perspective presents our current understanding of one class of protein assembly, the α-helical coiled coils.At first sight, these are straightforward: sequence repeats of hydrophobic (h) and polar (p) residues, (hpphppp) n , direct the folding and assembly of amphipathic α helices into bundles.However, many different bundles are possible: they can have two or more helices (different oligomers); the helices can have parallel, antiparallel, or mixed arrangements (different topologies); and the helical sequences can be the same (homomers) or different (heteromers).Thus, sequence-to-structure relationships must be present within the hpphppp repeats to distinguish these states.I discuss the current understanding of this problem at three levels: first, physics gives a parametric framework to generate the many possible coiled-coil backbone structures.Second, chemistry provides a means to explore and deliver sequence-to-structure relationships.Third, biology shows how coiled coils are adapted and functionalized in nature, inspiring applications of coiled coils in synthetic biology.I argue that the chemistry is largely understood; the physics is partly solved, though the considerable challenge of predicting even relative stabilities of different coiled-coil states remains; but there is much more to explore in the biology and synthetic biology of coiled coils.

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Crossref · 10.1016/j.jbc.2023.104579

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  • The free energy landscape of coiled coils is complex, consisting of multiple local, energetically close minima.

    “The free energy landscape of coiled coils is complex, consisting of multiple local, energetically close minima.32,33”

    From Assessment of the Topology and Oligomerisation States of Coiled Coils Using Metadynamics with Conformational Restraints (2025) · cites this paper as [32]

    The “Current rules and challenges in coiled-coil design” section describes a complex free-energy landscape with multiple states close in energy, using CC-Hex as an example. “A note of caution” likewise says multiple states may be accessible for the short, low-to-medium-complexity de novo coiled coils discussed there. These passages support the central idea, but not its unqualified extension to coiled coils generally. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Achieving quantitative predictions of coiled-coil stability by calculating the free energy of oligomerization has been deemed one of the outstanding challenges in coiled coil research.

    “For these reasons, achieving quantitative predictions of coiled-coil stability by calculating the free energy of oligomerization has been deemed one of the outstanding challenges in coiled coil research.32”
  • Computational design of multistate coiled-coil assemblies is challenging because it requires accurate estimates of the free energy differences between multiple alternative coiled-coil conformations.

    “However, the computational design of multistate coiled-coil protein assemblies is challenging, as it requires accurate estimates of the free energy differences between multiple alternative coiled-coil conformations.”

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Research works printed but not linked: 1

  1. Plaper, 2021, De novo designed parallel heterodimeric coiled-coil peptide pairs with high affinity for use in mammalian cells, FEBS Open Biol., 11, 269

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Authors
Woolfson, D. N.
Affiliations
University of Bristol (GB)
Corresponding author
Woolfson, Derek N.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2023-04
Volume
299
Issue
4
Pages
104579
ISSN
0021-9258 (ISSN-L)
OpenAlex
W4323276421
Cited by
106
References
292
Citations by year
2026: 24 · 2025: 39 · 2024: 29 · 2023: 14
FWCI
2.78
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Explore Bristol Research (submittedVersion, cc-by-nc-nd)
Funders
  • Biotechnology and Biological Sciences Research Council (BB/S002820/1, BB/V004220/1, BB/V006231/1)
  • Royal Society (WM140008)
  • University of Bristol
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Structural Characterization
Keywords
alpha-helical coiled coil, coiled-coil stability, synthetic biology, protein design, protein folding
MeSH terms
Protein Domains, Protein Conformation, alpha-Helical, Biology, Physics, Proteins, Protein Folding

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