Chaperonin Mechanisms: Multiple and (Mis)Understood?

2022 ◽  
Vol 51 (1) ◽  
Author(s):  
Amnon Horovitz ◽  
Tali Haviv Reingewertz ◽  
Jorge Cuéllar ◽  
José María Valpuesta
Keyword(s):  
Escherichia Coli ◽  
Protein Folding ◽  
Reaction Mechanism ◽  
Reaction Mechanisms ◽  
Online Publication ◽  
Annual Review ◽  
Folding Pathway ◽  
Publication Date ◽  
T Complex ◽  
Key Aspects

The chaperonins are ubiquitous and essential nanomachines that assist in protein folding in an ATP-driven manner. They consist of two back-to-back stacked oligomeric rings with cavities in which protein (un)folding can take place in a shielding environment. This review focuses on GroEL from Escherichia coli and the eukaryotic chaperonin-containing t-complex polypeptide 1, which differ considerably in their reaction mechanisms despite sharing a similar overall architecture. Although chaperonins feature in many current biochemistry textbooks after being studied intensively for more than three decades, key aspects of their reaction mechanisms remain under debate and are discussed in this review. In particular, it is unclear whether a universal reaction mechanism operates for all substrates and whether it is passive, i.e., aggregation is prevented but the folding pathway is unaltered, or active. It is also unclear how chaperonin clients are distinguished from nonclients and what are the precise roles of the cofactors with which chaperonins interact. Expected final online publication date for the Annual Review of Biophysics, Volume 51 is May 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Bacterial Multicellularity: The Biology of Escherichia coli Building Large-Scale Biofilm Communities

2021 ◽  
Vol 75 (1) ◽  
Author(s):  
Diego O. Serra ◽  
Regine Hengge
Keyword(s):  
Escherichia Coli ◽  
Large Scale ◽  
Second Messengers ◽  
Emergent Properties ◽  
Annual Review ◽  
Publication Date ◽  
Growth And Survival ◽  
Chemical Gradients ◽  
Life Itself ◽  
Scale Matrix

Biofilms are a widespread multicellular form of bacterial life. The spatial structure and emergent properties of these communities depend on a polymeric extracellular matrix architecture that is orders of magnitude larger than the cells that build it. Using as a model the wrinkly macrocolony biofilms of Escherichia coli, which contain amyloid curli fibers and phosphoethanolamine (pEtN)-modified cellulose as matrix components, we summarize here the structure, building, and function of this large-scale matrix architecture. Based on different sigma and other transcription factors as well as second messengers, the underlying regulatory network reflects the fundamental trade-off between growth and survival. It controls matrix production spatially in response to long-range chemical gradients, but it also generates distinct patterns of short-range matrix heterogeneity that are crucial for tissue-like elasticity and macroscopic morphogenesis. Overall, these biofilms confer protection and a potential for homeostasis, thereby reducing maintenance energy, which makes multicellularity an emergent property of life itself. Expected final online publication date for the Annual Review of Microbiology, Volume 75 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

New Directions in the Study of Institutional Logics: From Tools to Phenomena

2021 ◽  
Vol 47 (1) ◽  
Author(s):  
Michael Lounsbury ◽  
Christopher W.J. Steele ◽  
Milo Shaoqing Wang ◽  
Madeline Toubiana
Keyword(s):  
Recent Work ◽  
Online Publication ◽  
Institutional Logics ◽  
Annual Review ◽  
Publication Date ◽  
Complex Dynamic ◽  
New Directions ◽  
Analytical Tools ◽  
Dynamic Phenomena

In this article, we take stock of the institutional logics perspective and highlight opportunities for new scholarship. While we celebrate the growth and generativity of the literature on institutional logics, we also note that there has been a troubling tendency in recent work to use logics as analytical tools, feeding disquiet about reification and reductionism. Seeding a broader scholarly agenda that addresses such weaknesses in the literature, we highlight nascent efforts that aim to more systematically understand institutional logics as complex, dynamic phenomena in their own right. In doing so, we argue for more research that probes how logics cohere and endure by unpacking the role of values, the centrality of practice, and the governance dynamics of institutional logics and their orders. Furthermore, we encourage bridging the study of institutional logics with various literatures, including ethnomethodology, phenomenology, professions, elites, world society, and the old institutionalism, to enhance progress in these directions. Expected final online publication date for the Annual Review of Sociology, Volume 47 is July 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Advances in Morphological Theory: Construction Morphology and Relational Morphology

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Jenny Audring
Keyword(s):  
Online Publication ◽  
Mental Lexicon ◽  
Research Community ◽  
Annual Review ◽  
Publication Date ◽  
Theory Construction ◽  
Construction Morphology ◽  
Challenges And Opportunities ◽  
Morphological Theory

In recent years, construction-based approaches to morphology have gained ground in the research community. This framework is characterized by the assumption that the mental lexicon is extensive and richly structured, containing not only a large number of stored words but also a wide variety of generalizations in the form of schemas. This review explores two construction-based theories, Construction Morphology and Relational Morphology. After outlining the basic theoretical architecture, the article presents an array of recent applications of a construction-based approach to morphological phenomena in various languages. In addition, it offers reflections on challenges and opportunities for further research. The review highlights those aspects of the theory that have proved particularly helpful in accommodating both the regularities and the quirks that are typical of the grammar of words. Expected final online publication date for the Annual Review of Linguistics, Volume 8 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

The Political Economy of Attention

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Morten Axel Pedersen ◽  
Kristoffer Albris ◽  
Nick Seaver
Keyword(s):  
Political Economy ◽  
Online Publication ◽  
The Political ◽  
Annual Review ◽  
Publication Date ◽  
Moral Concern ◽  
Digital Platforms ◽  
Political Economic

Attention has become an issue of intense political, economic, and moral concern over recent years: from the commodification of attention by digital platforms to the alleged loss of the attentional capacities of screen-addicted children (and their parents). While attention has rarely been an explicit focus of anthropological inquiry, it has still played an important if mostly tacit part in many anthropological debates and subfields. Focusing on anthropological scholarship on digital worlds and ritual forms, we review resources for colleagues interested in this burgeoning topic of research and identify potential avenues for an incipient anthropology of attention, which studies how attentional technologies and techniques mold human minds and bodies in more or less intentional ways. Expected final online publication date for the Annual Review of Anthropology, Volume 50 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Recent Research on the Archaeology of War and Violence

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Andrew K. Scherer
Keyword(s):  
State Formation ◽  
Online Publication ◽  
General Trend ◽  
Annual Review ◽  
Publication Date ◽  
Modern Times ◽  
The Past ◽  
Definition Of ◽  
Consequences Of Violence

The mid-1990s through the first decade of the new millennium marked an increase in publications pertaining to war and violence in the ancient past. This review considers how scholars of the past decade have responded to that work. The emerging consensus is that war and violence were endemic to all societies studied by archaeologists, and yet the frequency, intensity, causes, and consequences of violence were highly variable for reasons that defy simplistic explanation. The general trend has been toward archaeologies of war and violence that focus on understanding the nuances of particular places and historical moments. Nevertheless, archaeologists continue to grapple with grand narratives of war, such as the proposition that violence has decreased from ancient to modern times and the role of war and violence in state formation and collapse. Recent research also draws attention to a more expansive definition of violence. Expected final online publication date for the Annual Review of Anthropology, Volume 50 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Confronting Banking Crises: Lessons from the Field

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Marc Dobler ◽  
Marina Moretti ◽  
Alvaro Piris
Keyword(s):  
Financial Crisis ◽  
Online Publication ◽  
Financial Crises ◽  
Global Financial Crisis ◽  
Banking Crises ◽  
Lessons Learned ◽  
Annual Review ◽  
Publication Date ◽  
Policy Interventions ◽  
Comprehensive Framework

Financial crises are a recurring feature of modern economies. This article summarizes the lessons learned from policy interventions and tools used to resolve banking crises from a practical, operational perspective and in light of the experiences and challenges faced during and since the 2008 global financial crisis. Managing a systemic banking crisis is a complex, multiyear process and requires a comprehensive framework for addressing systemic banking problems while minimizing taxpayers’ costs. Expected final online publication date for the Annual Review of Financial Economics, Volume 13 is March 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Particle-Laden Turbulence: Progress and Perspectives

2021 ◽  
Vol 54 (1) ◽  
Author(s):  
Luca Brandt ◽  
Filippo Coletti
Keyword(s):  
Fluid Dynamics ◽  
Fluid Mechanics ◽  
Online Publication ◽  
Granular Media ◽  
Finite Size ◽  
Spherical Particles ◽  
Annual Review ◽  
Publication Date ◽  
Zero Gravity ◽  
Inertial Particles

This review is motivated by the fast progress in our understanding of the physics of particle-laden turbulence in the last decade, partly due to the tremendous advances of measurement and simulation capabilities. The focus is on spherical particles in homogeneous and canonical wall-bounded flows. The analysis of recent data indicates that conclusions drawn in zero gravity should not be extrapolated outside of this condition, and that the particle response time alone cannot completely define the dynamics of finite-size particles. Several breakthroughs have been reported, mostly separately, on the dynamics and turbulence modifications of small inertial particles in dilute conditions and of large weakly buoyant spheres. Measurements at higher concentrations, simulations fully resolving smaller particles, and theoretical tools accounting for both phases are needed to bridge this gap and allow for the exploration of the fluid dynamics of suspensions, from laminar rheology and granular media to particulate turbulence. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 54 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

scholarly journals Bacteriophage-Bacteria Interactions in the Gut: From Invertebrates to Mammals

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Joshua M. Kirsch ◽  
Robert S. Brzozowski ◽  
Dominick Faith ◽  
June L. Round ◽  
Patrick R. Secor ◽  
...  
Keyword(s):  
Immune System ◽  
Environmental Conditions ◽  
Online Publication ◽  
Annual Review ◽  
Publication Date ◽  
Microbiota Composition ◽  
Complex Environment ◽  
Health And Disease ◽  
Polymicrobial Communities ◽  
Diverse Interactions

Bacteria and their viruses (bacteriophages or phages) interact antagonistically and beneficially in polymicrobial communities such as the guts of animals. These interactions are multifaceted and are influenced by environmental conditions. In this review, we discuss phage-bacteria interactions as they relate to the complex environment of the gut. Within the mammalian and invertebrate guts, phages and bacteria engage in diverse interactions including genetic coexistence through lysogeny, and phages directly modulate microbiota composition and the immune system with consequences that are becoming recognized as potential drivers of health and disease. With greater depth of understanding of phage-bacteria interactions in the gut and the outcomes, future phage therapies become possible. Expected final online publication date for the Annual Review of Virology, Volume 8 is September 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Postcolonial Semiotics

2021 ◽  
Vol 50 (1) ◽  
Author(s):  
Angela Reyes
Keyword(s):  
Online Publication ◽  
Continuous Production ◽  
Linguistic Anthropology ◽  
Annual Review ◽  
Publication Date ◽  
Economic Interests ◽  
Recent Scholarship ◽  
The Creation

This article provides an overview of recent scholarship on postcolonial semiotics: processes through which linguistic and other signs are linked to the colonial and its ongoing relevance in the construction of value. After tracing the question of colonialism across scholarly lineages in linguistic anthropology, this article focuses on elite formations as a key realm within postcolonial semiotics and on “fake,” “mix,” and “excess” as central qualities that constitute chronotopically anchored dimensions of ambivalent, aspirational postcolonial eliteness. Linguistic anthropological work on postcolonial elite formations illuminates how economic interests are advanced through the creation of ambiguous value around emblems presupposed as colonial and attached to differentiated elite types in fractally recursive forms. Scholarship on postcolonial semiotics reveals how colonial hierarchies persist through the continuous production of divisible interior alterities that create nested categories of the formerly colonized, inventing elite types that are both denigrated and admired for their supposed approximation to imperial modes of being and speaking. Expected final online publication date for the Annual Review of Anthropology, Volume 50 is October 2021. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

On the Acquisition of Attitude Verbs

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Valentine Hacquard ◽  
Jeffrey Lidz
Keyword(s):  
Case Studies ◽  
Cognitive Abilities ◽  
Online Publication ◽  
Indirect Evidence ◽  
Mental States ◽  
Physical World ◽  
Annual Review ◽  
Publication Date ◽  
Attitude Verbs ◽  
Internal Mental States

Attitude verbs, such as think, want, and know, describe internal mental states that leave few cues as to their meanings in the physical world. Consequently, their acquisition requires learners to draw from indirect evidence stemming from the linguistic and conversational contexts in which they occur. This provides us a unique opportunity to probe the linguistic and cognitive abilities that children deploy in acquiring these words. Through a few case studies, we show how children make use of syntactic and pragmatic cues to figure out attitude verb meanings and how their successes, and even their mistakes, reveal remarkable conceptual, linguistic, and pragmatic sophistication. Expected final online publication date for the Annual Review of Linguistics, Volume 8 is January 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

Sign in / Sign up

Export Citation Format

Share Document