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      Theoretical and Data-Driven Approaches for Biomolecular Condensates

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          Abstract

          Biomolecular condensation processes are increasingly recognized as a fundamental mechanism that living cells use to organize biomolecules in time and space. These processes can lead to the formation of membraneless organelles that enable cells to perform distinct biochemical processes in controlled local environments, thereby supplying them with an additional degree of spatial control relative to that achieved by membrane-bound organelles. This fundamental importance of biomolecular condensation has motivated a quest to discover and understand the molecular mechanisms and determinants that drive and control this process. Within this molecular viewpoint, computational methods can provide a unique angle to studying biomolecular condensation processes by contributing the resolution and scale that are challenging to reach with experimental techniques alone. In this Review, we focus on three types of dry-lab approaches: theoretical methods, physics-driven simulations and data-driven machine learning methods. We review recent progress in using these tools for probing biomolecular condensation across all three fields and outline the key advantages and limitations of each of the approaches. We further discuss some of the key outstanding challenges that we foresee the community addressing next in order to develop a more complete picture of the molecular driving forces behind biomolecular condensation processes and their biological roles in health and disease.

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          Highly accurate protein structure prediction with AlphaFold

          Proteins are essential to life, and understanding their structure can facilitate a mechanistic understanding of their function. Through an enormous experimental effort 1 – 4 , the structures of around 100,000 unique proteins have been determined 5 , but this represents a small fraction of the billions of known protein sequences 6 , 7 . Structural coverage is bottlenecked by the months to years of painstaking effort required to determine a single protein structure. Accurate computational approaches are needed to address this gap and to enable large-scale structural bioinformatics. Predicting the three-dimensional structure that a protein will adopt based solely on its amino acid sequence—the structure prediction component of the ‘protein folding problem’ 8 —has been an important open research problem for more than 50 years 9 . Despite recent progress 10 – 14 , existing methods fall far short of atomic accuracy, especially when no homologous structure is available. Here we provide the first computational method that can regularly predict protein structures with atomic accuracy even in cases in which no similar structure is known. We validated an entirely redesigned version of our neural network-based model, AlphaFold, in the challenging 14th Critical Assessment of protein Structure Prediction (CASP14) 15 , demonstrating accuracy competitive with experimental structures in a majority of cases and greatly outperforming other methods. Underpinning the latest version of AlphaFold is a novel machine learning approach that incorporates physical and biological knowledge about protein structure, leveraging multi-sequence alignments, into the design of the deep learning algorithm. AlphaFold predicts protein structures with an accuracy competitive with experimental structures in the majority of cases using a novel deep learning architecture.
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            CHARMM36m: an improved force field for folded and intrinsically disordered proteins

            An all-atom protein force field, CHARMM36m, offers improved accuracy for simulating intrinsically disordered peptides and proteins.
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              Accurate prediction of protein structures and interactions using a 3-track neural network

              DeepMind presented remarkably accurate predictions at the recent CASP14 protein structure prediction assessment conference. We explored network architectures incorporating related ideas and obtained the best performance with a 3-track network in which information at the 1D sequence level, the 2D distance map level, and the 3D coordinate level is successively transformed and integrated. The 3-track network produces structure predictions with accuracies approaching those of DeepMind in CASP14, enables the rapid solution of challenging X-ray crystallography and cryo-EM structure modeling problems, and provides insights into the functions of proteins of currently unknown structure. The network also enables rapid generation of accurate protein-protein complex models from sequence information alone, short circuiting traditional approaches which require modeling of individual subunits followed by docking. We make the method available to the scientific community to speed biological research.
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                Author and article information

                Journal
                Chem Rev
                Chem Rev
                cr
                chreay
                Chemical Reviews
                American Chemical Society
                0009-2665
                1520-6890
                12 May 2023
                26 July 2023
                : 123
                : 14 , Phase Separation
                : 8988-9009
                Affiliations
                []Yusuf Hamied Department of Chemistry, University of Cambridge , Cambridge CB2 1EW, United Kingdom
                [# ]Transition Bio Ltd. , Cambridge, United Kingdom
                []Laboratory of Chemical Physics, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health , Bethesda, Maryland 20892, United States
                []Department of Genetics, University of Cambridge , Cambridge CB2 3EH, United Kingdom
                [§ ]Cavendish Laboratory, Department of Physics, University of Cambridge , Cambridge CB3 0HE, United Kingdom
                Author notes
                Author information
                https://orcid.org/0000-0002-5926-3628
                https://orcid.org/0000-0002-8539-3346
                https://orcid.org/0000-0001-5308-8542
                https://orcid.org/0000-0003-1781-7351
                https://orcid.org/0000-0002-7893-3543
                https://orcid.org/0000-0002-7879-0140
                Article
                10.1021/acs.chemrev.2c00586
                10375482
                37171907
                e99f8902-a8c2-4565-a7da-bf0c7f1538a0
                © 2023 The Authors. Published by American Chemical Society

                Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained ( https://creativecommons.org/licenses/by/4.0/).

                History
                : 23 August 2022
                Funding
                Funded by: National Institute of Diabetes and Digestive and Kidney Diseases, doi 10.13039/100000062;
                Award ID: NA
                Funded by: Winton Programme for the Physics of Sustainability, doi NA;
                Award ID: NA
                Funded by: Schmidt Science Fellows, doi NA;
                Award ID: G104038
                Funded by: Cambridge Trust, doi 10.13039/501100003343;
                Award ID: NA
                Funded by: Rhodes Scholarships, doi 10.13039/501100000697;
                Award ID: G104038
                Funded by: Seventh Framework Programme, doi 10.13039/100011102;
                Award ID: FP7/20072013
                Funded by: H2020 European Research Council, doi 10.13039/100010663;
                Award ID: 803326
                Funded by: Frances and Augustus Newman Foundation, doi 10.13039/100007898;
                Award ID: NA
                Categories
                Review
                Custom metadata
                cr2c00586
                cr2c00586

                Chemistry
                Chemistry

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