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KorB switching from DNA-sliding clamp to repressor mediates long-range gene silencing in a multi-drug resistance plasmid.
Nat Microbiol
January 2025
Department of Molecular Microbiology, John Innes Centre, Norwich, UK.
Examples of long-range gene regulation in bacteria are rare and generally thought to involve DNA looping. Here, using a combination of biophysical approaches including X-ray crystallography and single-molecule analysis for the KorB-KorA system in Escherichia coli, we show that long-range gene silencing on the plasmid RK2, a source of multi-drug resistance across diverse Gram-negative bacteria, is achieved cooperatively by a DNA-sliding clamp, KorB, and a clamp-locking protein, KorA. We show that KorB is a CTPase clamp that can entrap and slide along DNA to reach distal target promoters up to 1.
View Article and Find Full Text PDFIndividual-specific strategies inform category learning.
Sci Rep
January 2025
Department of Neuroscience, University of Pennsylvania, Philadelphia, PA, USA.
Categorization is an essential task for sensory perception. Individuals learn category labels using a variety of strategies to ensure that sensory signals, such as sounds or images, can be assigned to proper categories. Categories are often learned on the basis of extreme examples, and the boundary between categories can differ among individuals.
View Article and Find Full Text PDFExpert navigators deploy rational complexity-based decision precaching for large-scale real-world planning.
Proc Natl Acad Sci U S A
January 2025
Institute of Behavioural Neuroscience, Department of Experimental Psychology, University College London, London WC1H 0AP, United Kingdom.
Efficient planning is a distinctive hallmark of intelligence in humans, who routinely make rapid inferences over complex world contexts. However, studies investigating how humans accomplish this tend to focus on naive participants engaged in simplistic tasks with small state spaces, which do not reflect the intricacy, ecological validity, and human specialization in real-world planning. In this study, we examine the street-by-street route planning of London taxi drivers navigating across more than 26,000 streets in London (United Kingdom).
View Article and Find Full Text PDFBrain connectivity for constructing new face representations in typical adults versus a prosopagnosic patient.
Neuroimage
January 2025
Department of Biological and Health Psychology, Faculty of Psychology, Universidad Autónoma de Madrid, Campus de Cantoblanco, 28049 Madrid, Spain.
Will our brains get to know a new face better if we look at its external features first? Here we offer neurophysiological evidence of the relevance of external versus internal facial features for constructing new face representations, by contrasting successful face processing with a prototypical case of face agnosia. A woman with acquired prosopagnosia (E.C.
View Article and Find Full Text PDF[Dealing with deep uncertainty during a pandemic; make policies adaptive].
Ned Tijdschr Geneeskd
January 2025
Radboudumc, Nijmegen. Afd. Medische Microbiologie en Radboudumc Community Infectieziekten.
This article is a reflection on the covid-19 pandemic and the policy on medical and non-medical e.g. (lock down) measures, and on how we can anticipate earlier on for example effects on education and wellbeing of young people.
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