Evidence map›Paper›PMID 21637799›Full record

ArticlePLoS computational biology2011

A role for both conformational selection and induced fit in ligand binding by the LAO protein.

Daniel-Adriano Silva, Gregory R Bowman, Alejandro Sosa-Peinado, Xuhui Huang

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Article in PLoS computational biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 95 papers.

0numbers the graph read from it
0cells of the map it votes in
95citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

95 citing papers in PubMed.

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  9. Molecular dynamics in multidimensional space explains how mutations affect the association path of neomycin to a riboswitch.Proceedings of the National Academy of Sciences of the United States of America · 2024
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35 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

4 authors.

Daniel-Adriano SilvaDepartment of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
Gregory R Bowman
Alejandro Sosa-Peinado
Xuhui Huang

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Molecular recognition is determined by the structure and dynamics of both a protein and its ligand, but it is difficult to directly assess the role of each of these players. In this study, we use Markov State Models (MSMs) built from atomistic simulations to elucidate the mechanism by which the Lysine-, Arginine-, Ornithine-binding (LAO) protein binds to its ligand. We show that our model can predict the bound state, binding free energy, and association rate with reasonable accuracy and then use the model to dissect the binding mechanism. In the past, this binding event has often been assumed to occur via an induced fit mechanism because the protein's binding site is completely closed in the bound state, making it impossible for the ligand to enter the binding site after the protein has adopted the closed conformation. More complex mechanisms have also been hypothesized, but these have remained controversial. Here, we are able to directly observe roles for both the conformational selection and induced fit mechanisms in LAO binding. First, the LAO protein tends to form a partially closed encounter complex via conformational selection (that is, the apo protein can sample this state), though the induced fit mechanism can also play a role here. Then, interactions with the ligand can induce a transition to the bound state. Based on these results, we propose that MSMs built from atomistic simulations may be a powerful way of dissecting ligand-binding mechanisms and may eventually facilitate a deeper understanding of allostery as well as the prediction of new protein-ligand interactions, an important step in drug discovery.

Indexed as

ArginineBacterial ProteinsCarrier ProteinsHoloenzymesMarkov ChainsMolecular Dynamics SimulationProtein BindingSalmonella typhimuriumThermodynamicsArginineBacterial ProteinsCarrier ProteinsHoloenzymeslysyl-arginyl-ornithine-binding protein, bacteria

Identifiers

PMID21637799
PMCPMC3102756

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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.