Volume 12, Issue 2 e1542
Advanced Review

Artificial intelligence advances for de novo molecular structure modeling in cryo-electron microscopy

Dong Si

Corresponding Author

Dong Si

Division of Computing and Software Systems, University of Washington Bothell, Bothell, Washington, USA

Correspondence

Dong Si, Division of Computing and Software Systems, University of Washington Bothell, Bothell, WA 98011, USA.

Email: [email protected]

Contribution: Conceptualization, Data curation, Funding acquisition, ​Investigation, Resources, Supervision, Visualization, Writing - original draft, Writing - review & editing

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Andrew Nakamura

Andrew Nakamura

Division of Computing and Software Systems, University of Washington Bothell, Bothell, Washington, USA

Contribution: Data curation, Formal analysis, ​Investigation, Methodology, Validation, Visualization, Writing - review & editing

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Runbang Tang

Runbang Tang

Molecular Engineering and Sciences Institute, University of Washington Seattle, Seattle, Washington, USA

Contribution: Data curation, Formal analysis, ​Investigation, Validation, Writing - review & editing

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Haowen Guan

Haowen Guan

Applied and Computational Math Sciences, University of Washington Seattle, Seattle, Washington, USA

Contribution: Data curation, ​Investigation, Methodology, Validation, Writing - review & editing

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Jie Hou

Jie Hou

Department of Computer Science, Saint Louis University, Saint Louis, Missouri, USA

Contribution: ​Investigation, Methodology, Visualization, Writing - review & editing

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Ammaar Firozi

Ammaar Firozi

Department of Computer Science, Saint Louis University, Saint Louis, Missouri, USA

Contribution: ​Investigation, Methodology, Writing - review & editing

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Renzhi Cao

Renzhi Cao

Department of Computer Science, Pacific Lutheran University, Tacoma, Washington, USA

Contribution: ​Investigation, Methodology, Writing - review & editing

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Kyle Hippe

Kyle Hippe

Department of Computer Science, Pacific Lutheran University, Tacoma, Washington, USA

Contribution: ​Investigation, Writing - review & editing

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Minglei Zhao

Minglei Zhao

Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois, USA

Contribution: ​Investigation, Writing - review & editing

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First published: 15 May 2021
Citations: 7

Edited by: Peter R. Schreiner, Editor-in-Chief

Funding information: National Science Foundation, Grant/Award Number: 2030381

Abstract

Cryo-electron microscopy (cryo-EM) has become a major experimental technique to determine the structures of large protein complexes and molecular assemblies, as evidenced by the 2017 Nobel Prize. Although cryo-EM has been drastically improved to generate high-resolution three-dimensional maps that contain detailed structural information about macromolecules, the computational methods for using the data to automatically build structure models are lagging far behind. The traditional cryo-EM model building approach is template-based homology modeling. Manual de novo modeling is very time-consuming when no template model is found in the database. In recent years, de novo cryo-EM modeling using machine learning (ML) and deep learning (DL) has ranked among the top-performing methods in macromolecular structure modeling. DL-based de novo cryo-EM modeling is an important application of artificial intelligence, with impressive results and great potential for the next generation of molecular biomedicine. Accordingly, we systematically review the representative ML/DL-based de novo cryo-EM modeling methods. Their significances are discussed from both practical and methodological viewpoints. We also briefly describe the background of cryo-EM data processing workflow. Overall, this review provides an introductory guide to modern research on artificial intelligence for de novo molecular structure modeling and future directions in this emerging field.

This article is categorized under:

  • Structure and Mechanism > Molecular Structures
  • Structure and Mechanism > Computational Biochemistry and Biophysics
  • Data Science > Artificial Intelligence/Machine Learning

Graphical Abstract

De novo structure modeling and feature detection from cryo-EM.

CONFLICT OF INTEREST

The authors have declared no conflicts of interest for this article.

DATA AVAILABILITY STATEMENT

Data sharing is not applicable to this article as no new data were created or analyzed in this study.