{"title":"Single-Cell Mechanics: Structural Determinants and Functional Relevance","authors":"Marta Urbanska, Jochen Guck","doi":"10.1146/annurev-biophys-030822-030629","DOIUrl":"https://doi.org/10.1146/annurev-biophys-030822-030629","url":null,"abstract":"The mechanical phenotype of a cell determines its ability to deform under force and is therefore relevant to cellular functions that require changes in cell shape, such as migration or circulation through the microvasculature. On the practical level, the mechanical phenotype can be used as a global readout of the cell's functional state, a marker for disease diagnostics, or an input for tissue modeling. We focus our review on the current knowledge of structural components that contribute to the determination of the cellular mechanical properties and highlight the physiological processes in which the mechanical phenotype of the cells is of critical relevance. The ongoing efforts to understand how to efficiently measure and control the mechanical properties of cells will define the progress in the field and drive mechanical phenotyping toward clinical applications.Expected final online publication date for the Annual Review of Biophysics, Volume 53 is May 2024. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"15 1","pages":""},"PeriodicalIF":12.4,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139923430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
George A. Pantelopulos, Conor B. Abraham, John E. Straub
{"title":"Cholesterol and Lipid Rafts in the Biogenesis of Amyloid-β Protein and Alzheimer's Disease","authors":"George A. Pantelopulos, Conor B. Abraham, John E. Straub","doi":"10.1146/annurev-biophys-062823-023436","DOIUrl":"https://doi.org/10.1146/annurev-biophys-062823-023436","url":null,"abstract":"Cholesterol has been conjectured to be a modulator of the amyloid cascade, the mechanism that produces the amyloid-β (Aβ) peptides implicated in the onset of Alzheimer's disease. We propose that cholesterol impacts the genesis of Aβ not through direct interaction with proteins in the bilayer, but indirectly by inducing the liquid-ordered phase and accompanying liquid–liquid phase separations, which partition proteins in the amyloid cascade to different lipid domains and ultimately to different endocytotic pathways. We explore the full process of Aβ genesis in the context of liquid-ordered phases induced by cholesterol, including protein partitioning into lipid domains, mechanisms of endocytosis experienced by lipid domains and secretases, and pH-controlled activation of amyloid precursor protein secretases in specific endocytotic environments. Outstanding questions on the essential role of cholesterol in the amyloid cascade are identified for future studies.Expected final online publication date for the Annual Review of Biophysics, Volume 53 is May 2024. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"32 1","pages":""},"PeriodicalIF":12.4,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139923379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metabolomics and Microbial Metabolism: Toward a Systematic Understanding","authors":"Duncan Holbrook-Smith, Julian Trouillon, Uwe Sauer","doi":"10.1146/annurev-biophys-030722-021957","DOIUrl":"https://doi.org/10.1146/annurev-biophys-030722-021957","url":null,"abstract":"Over the past decades, our understanding of microbial metabolism has increased dramatically. Metabolomics, a family of techniques that are used to measure the quantities of small molecules in biological samples, has been central to these efforts. Advances in analytical chemistry have made it possible to measure the relative and absolute concentrations of more and more compounds with increasing levels of certainty. In this review, we highlight how metabolomics has contributed to understanding microbial metabolism and in what ways it can still be deployed to expand our systematic understanding of metabolism. To that end, we explain how metabolomics was used to ( a) characterize network topologies of metabolism and its regulation networks, ( b) elucidate the control of metabolic function, and ( c) understand the molecular basis of higher-order phenomena. We also discuss areas of inquiry where technological advances should continue to increase the impact of metabolomics, as well as areas where our understanding is bottlenecked by other factors such as the availability of statistical and modeling frameworks that can extract biological meaning from metabolomics data.Expected final online publication date for the Annual Review of Biophysics, Volume 53 is May 2024. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"306 2 1","pages":""},"PeriodicalIF":12.4,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138744442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Toshio Ando, Shingo Fukuda, Kien X. Ngo, Holger Flechsig
{"title":"High-Speed Atomic Force Microscopy for Filming Protein Molecules in Dynamic Action","authors":"Toshio Ando, Shingo Fukuda, Kien X. Ngo, Holger Flechsig","doi":"10.1146/annurev-biophys-030722-113353","DOIUrl":"https://doi.org/10.1146/annurev-biophys-030722-113353","url":null,"abstract":"Structural biology is currently undergoing a transformation into dynamic structural biology, which reveals the dynamic structure of proteins during their functional activity to better elucidate how they function. Among the various approaches in dynamic structural biology, high-speed atomic force microscopy (HS-AFM) is unique in the ability to film individual molecules in dynamic action, although only topographical information is acquirable. This review provides a guide to the use of HS-AFM for biomolecular imaging and showcases several examples, as well as providing information on up-to-date progress in HS-AFM technology. Finally, we discuss the future prospects of HS-AFM in the context of dynamic structural biology in the upcoming era.Expected final online publication date for the Annual Review of Biophysics, Volume 53 is May 2024. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"2 1","pages":""},"PeriodicalIF":12.4,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138556113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual Review of BiophysicsPub Date : 2023-05-09Epub Date: 2023-02-03DOI: 10.1146/annurev-biophys-111622-091232
Amer Alam, Kaspar P Locher
{"title":"Structure and Mechanism of Human ABC Transporters.","authors":"Amer Alam, Kaspar P Locher","doi":"10.1146/annurev-biophys-111622-091232","DOIUrl":"10.1146/annurev-biophys-111622-091232","url":null,"abstract":"<p><p>ABC transporters are essential for cellular physiology. Humans have 48 ABC genes organized into seven distinct families. Of these genes, 44 (in five distinct families) encode for membrane transporters, of which several are involved in drug resistance and disease pathways resulting from transporter dysfunction. Over the last decade, advances in structural biology have vastly expanded our mechanistic understanding of human ABC transporter function, revealing details of their molecular arrangement, regulation, and interactions, facilitated in large part by advances in cryo-EM that have rendered hitherto inaccessible targets amenable to high-resolution structural analysis. As a result, experimentally determined structures of multiple members of each of the five families of ABC transporters in humans are now available. Here we review this recent progress, highlighting the physiological relevance of human ABC transporters and mechanistic insights gleaned from their direct structure determination. We also discuss the impact and limitations of model systems and structure prediction methods in understanding human ABC transporters and discuss current challenges and future research directions.</p>","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"52 ","pages":"275-300"},"PeriodicalIF":12.4,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9437904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Annual Review of BiophysicsPub Date : 2023-05-09Epub Date: 2023-02-15DOI: 10.1146/annurev-biophys-111622-091140
T Kubař, M Elstner, Q Cui
{"title":"Hybrid Quantum Mechanical/Molecular Mechanical Methods For Studying Energy Transduction in Biomolecular Machines.","authors":"T Kubař, M Elstner, Q Cui","doi":"10.1146/annurev-biophys-111622-091140","DOIUrl":"10.1146/annurev-biophys-111622-091140","url":null,"abstract":"<p><p>Hybrid quantum mechanical/molecular mechanical (QM/MM) methods have become indispensable tools for the study of biomolecules. In this article, we briefly review the basic methodological details of QM/MM approaches and discuss their applications to various energy transduction problems in biomolecular machines, such as long-range proton transports, fast electron transfers, and mechanochemical coupling. We highlight the particular importance for these applications of balancing computational efficiency and accuracy. Using several recent examples, we illustrate the value and limitations of QM/MM methodologies for both ground and excited states, as well as strategies for calibrating them in specific applications. We conclude with brief comments on several areas that can benefit from further efforts to make QM/MM analyses more quantitative and applicable to increasingly complex biological problems.</p>","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"52 ","pages":"525-551"},"PeriodicalIF":10.4,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10810093/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9444168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Assembly and Architecture of NLR Resistosomes and Inflammasomes.","authors":"Zehan Hu, Jijie Chai","doi":"10.1146/annurev-biophys-092922-073050","DOIUrl":"https://doi.org/10.1146/annurev-biophys-092922-073050","url":null,"abstract":"<p><p>Nucleotide-binding and leucine-rich repeat (NLR) proteins are critical intracellular immune receptors in both animals and plants. Perception of pathogen-derived or stress-associated signals induces NLR oligomerization to form multiprotein complexes called inflammasomes in animals or resistosomes in plants to mediate host immune response. Significant progress has been made during the past few years in our understanding of NLR biology, particularly the structural perspective of these two types of NLR-containing complexes. In this article, we review the latest advances in our structural knowledge of how NLR inflammasomes and resistosomes are activated and assembled and how the structural information provides insight into their distinct mechanisms of action. Commonalities and differences between NLR inflammasomes and resistosomes are also discussed.</p>","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"52 ","pages":"207-228"},"PeriodicalIF":12.4,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9814899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ball-and-Chain Inactivation in Potassium Channels.","authors":"Nattakan Sukomon, Chen Fan, Crina M Nimigean","doi":"10.1146/annurev-biophys-100322-072921","DOIUrl":"https://doi.org/10.1146/annurev-biophys-100322-072921","url":null,"abstract":"Carefully orchestrated opening and closing of ion channels controls the diffusion of ions across cell membranes, generating the electrical signals required for fast transmission of information throughout the nervous system. Inactivation is a parsimonious means for channels to restrict ion conduction without the need to remove the activating stimulus. Voltage-gated channel inactivation plays crucial physiological roles, such as controlling action potential duration and firing frequency in neurons. The ball-and-chain moniker applies to a type of inactivation proposed first for sodium channels and later shown to be a universal mechanism. Still, structural evidence for this mechanism remained elusive until recently. We review the ball-and-chain inactivation research starting from its introduction as a crucial component of sodium conductance during electrical signaling in the classical Hodgkin and Huxley studies, through the discovery of its simple intuitive mechanism in potassium channels during the molecular cloning era, to the eventual elucidation of a potassium channel structure in a ball-and-chain inactivated state. Expected final online publication date for the Annual Review of Biophysics, Volume 52 is May 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"52 ","pages":"91-111"},"PeriodicalIF":12.4,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9814900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Karola Gerecht, Niklas Freund, Wei Liu, Yang Liu, Maximilian J L J Fürst, Philipp Holliger
{"title":"The Expanded Central Dogma: Genome Resynthesis, Orthogonal Biosystems, Synthetic Genetics.","authors":"Karola Gerecht, Niklas Freund, Wei Liu, Yang Liu, Maximilian J L J Fürst, Philipp Holliger","doi":"10.1146/annurev-biophys-111622-091203","DOIUrl":"https://doi.org/10.1146/annurev-biophys-111622-091203","url":null,"abstract":"<p><p>Synthetic biology seeks to probe fundamental aspects of biological form and function by construction [i.e., (re)synthesis] rather than deconstruction (analysis). In this sense, biological sciences now follow the lead given by the chemical sciences. Synthesis can complement analytic studies but also allows novel approaches to answering fundamental biological questions and opens up vast opportunities for the exploitation of biological processes to provide solutions for global problems. In this review, we explore aspects of this synthesis paradigm as applied to the chemistry and function of nucleic acids in biological systems and beyond, specifically, in genome resynthesis, synthetic genetics (i.e., the expansion of the genetic alphabet, of the genetic code, and of the chemical make-up of genetic systems), and the elaboration of orthogonal biosystems and components.</p>","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"52 ","pages":"413-432"},"PeriodicalIF":12.4,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7614659/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9636415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Next-Gen Biophysics: Look to the Forest, Beyond the Trees.","authors":"Jeremy Schmit, Ken A Dill","doi":"10.1146/annurev-bb-52-030923-100001","DOIUrl":"10.1146/annurev-bb-52-030923-100001","url":null,"abstract":"","PeriodicalId":50756,"journal":{"name":"Annual Review of Biophysics","volume":"52 ","pages":"v-viii"},"PeriodicalIF":12.4,"publicationDate":"2023-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9501369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}