4.5 Article

Expanding the versatility of natural and de novo designed coiled coils and helical bundles

Journal

CURRENT OPINION IN STRUCTURAL BIOLOGY
Volume 68, Issue -, Pages 224-234

Publisher

CURRENT BIOLOGY LTD
DOI: 10.1016/j.sbi.2021.03.011

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Funding

  1. Max Planck Society
  2. Madeleine Schickedanz-KinderKrebs-Stiftung endowed chair Modeling Tumorigenesis

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Natural helical bundles (HBs) are protein folds built of α helices that adopt diverse topologies and functions, ranging from structural scaffolds to molecular switches; Symmetric HBs, such as coiled coils, serve as ideal model systems for studying protein folding and design.
Natural helical bundles (HBs) constitute a ubiquitous class of protein folds built of two or more longitudinally arranged a helices. They adopt topologies that include symmetric, highly regular assemblies all the way to asymmetric, loosely packed domains. The diverse functional spectrum of HBs ranges from structural scaffolds to complex and dynamic effectors as molecular motors, signaling and sensing molecules, enzymes, and molecular switches. Symmetric HBs, particularly coiled coils, offer simple model systems providing an ideal entry point for protein folding and design studies. Herein, we review recent progress unveiling new structural features and functional mechanisms in natural HBs and cover staggering advances in the de novo design of HBs, giving rise to exotic structures and the creation of novel functions.

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