Cited by 596Protein Structure and DynamicsProtein Interaction Studies and Fluorescence AnalysisEnzyme Structure and Function

Folding funnels and binding mechanisms

Ma, Buyong, Kumar, Sandeep, Tsai, Chung-Jung, Nussinov, Ruth·1999·Protein Engineering, Design and Selection

Abstract

The long-held views on lock-and-key versus induced fit in binding arose from the notion that a protein exists in a single, most stable conformation, dictated by its sequence. However, in solution proteins exist in a range of conformations, which may be described by statistical mechanical laws and their populations follow statistical distributions. Upon binding, the equilibrium will shift in favor of the bound conformation from the ensemble of conformations around the bottom of the folding funnel. Hence here we extend the implications and the usefulness of the folding funnel concept to explain fundamental binding mechanisms.

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Registry

Crossref · 10.1093/protein/12.9.713

Cites

75 of 75 references verified0 citation errors · 0 not checkable

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  • The conformational selection and population shift model provides a more realistic description of molecular mechanism considering ensemble nature.

    “The ‘conformational selection and population shift’ model87–89,134 provides a more realistic description of the molecular mechanism considering the ensemble nature of protein molecules.”
  • During binding, higher energy (lower population) conformers most complementary to pre-existing ligand conformations can be selected, shifting equilibrium toward them.

    “During binding, higher energy (lower population) conformers which are most complementary to some pre-existing ligand conformations can be selected and the equilibrium shifts toward these conformers.87–89,134”
  • Biomolecules are dynamical objects that are always interconverting between structures with varying energies, and this is the origin of allosteric mechanisms.

    “biomolecules are dynamical objects that are always interconverting between a variety of structures with varying energies,166 and that this is the origin of allosteric mechanisms.”

    From AlphaFold, Artificial Intelligence (AI), and Allostery (2022) · cites this paper as [168]

  • The conformational selection mechanism theorizes that the energy surface hosts a very large number of conformations, the best-fitting one is selected, with subsequent minor induced fit optimization largely by side chains.

    “In contrast, the conformational selection mechanism167−169,185 theorizes that the energy surface hosts a very large number of conformations, and the one that fits best is selected, with subsequent minor induced fit optimization, largely by side chains.”

    From AlphaFold, Artificial Intelligence (AI), and Allostery (2022) · cites this paper as [168]

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Authors
Ma, B., Kumar, S., Tsai, C.-J., & Nussinov, R.
Affiliations
  • National Institutes of Health (US)
  • National Cancer Institute (US)
Venue
Protein Engineering, Design and Selection
Published
1999-09
Volume
12
Issue
9
Pages
713-720
ISSN
  • 0269-2139 (ISSN-L)
  • 1741-0134
  • 1741-0126
OpenAlex
W2123529526
Cited by
594
References
75
Citations by year
2026: 12 · 2025: 15 · 2024: 16 · 2023: 27 · 2022: 21 · 2021: 30 · 2020: 29 · 2019: 27 · 2018: 21 · 2017: 35 · 2016: 33 · 2015: 19 · 2014: 34 · 2013: 43 · 2012: 26
FWCI
0.70
Type
journal article
Language
en
Open access
closed
Locations
  • Protein Engineering Design and Selection (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Health and Human Services
  • Israel Science Foundation
  • Tel Aviv University
  • National Institutes of Health (n01co056000-057, NO1-CO-56000, CO-56000)
  • National Cancer Institute (N01 CO 56000, NO1CO56000)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Interaction Studies and Fluorescence Analysis
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
folding funnel, protein binding mechanism, induced fit, lock-and-key model, protein conformational ensembles, conformational statistics, binding equilibrium, protein folding
MeSH terms
Peptides, Protein Binding, Protein Conformation, Proteins, Protein Folding

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