728 results found
    1. Evolutionary Biology

    Coupling adaptive molecular evolution to phylodynamics using fitness-dependent birth-death models

    David A Rasmussen, Tanja Stadler
    A new model describes how adaptive molecular evolution shapes phylogenetic trees and can be used to estimate the fitness effects of mutations from phylogenies.
    1. Computational and Systems Biology
    2. Chromosomes and Gene Expression

    Stochastic modelling, Bayesian inference, and new in vivo measurements elucidate the debated mtDNA bottleneck mechanism

    Iain G Johnston et al.
    New modelling, statistics, and experiments show that cellular populations of mitochondrial DNA (mtDNA) evolve during development according to solvable stochastic dynamics involving binomial partitioning and random turnover, facilitating a predictive and quantitative theory of the mtDNA bottleneck.
    1. Computational and Systems Biology

    Evolutionary dynamics of incubation periods

    Bertrand Ottino-Loffler et al.
    Evolutionary graph theory solves the longstanding puzzle of why diverse infectious diseases and cancers show similar (approximately lognormal) distributions of their incubation periods.
    1. Physics of Living Systems

    Adaptation of olfactory receptor abundances for efficient coding

    Tiberiu Teşileanu et al.
    A model of efficient coding by olfactory neurons explains context-dependence observed in the effect of perturbations to the olfactory environment.
    1. Ecology
    2. Evolutionary Biology

    Point of View: Towards a mechanistic foundation of evolutionary theory

    Michael Doebeli et al.
    A description of evolution that is based on birth-death processes, and in which fitness is at most a derived quantity, is advocated.
    1. Biochemistry and Chemical Biology
    2. Developmental Biology

    Haploinsufficiency of Trp53 dramatically extends the lifespan of Sirt6-deficient mice

    Shrestha Ghosh et al.
    The dramatic extension of lifespan in Sirt6-deficient mice by Trp53 haploinsufficiency suggests that SIRT6 has distinct biological function from SIRT1 in regulating p53 activity and preventing cells from senescence/apoptosis.
    1. Computational and Systems Biology
    2. Developmental Biology

    Vascular dimorphism ensured by regulated proteoglycan dynamics favors rapid umbilical artery closure at birth

    Sumeda Nandadasa et al.
    Morphologic, molecular, biomechanical and computational analyses show that the specialized extracellular matrix architecture of the umbilical artery contributes to its rapid closure at birth and regulates smooth muscle cell differentiation.
    1. Ecology
    2. Epidemiology and Global Health

    Accelerated viral dynamics in bat cell lines, with implications for zoonotic emergence

    Cara E Brook et al.
    Bats' uniquely robust innate antiviral immune defenses select for faster transmitting viruses likely to generate extreme virulence upon spillover to secondary hosts with immune systems divergent from those of bat.
    1. Evolutionary Biology
    2. Genetics and Genomics

    A de novo evolved gene in the house mouse regulates female pregnancy cycles

    Chen Xie et al.
    A female specifically expressed new protein-coding gene that has emerged out of non-coding sequences without detectable signatures of adaptive evolution affects female pregnancy cycles.
    1. Ecology

    Acknowledging selection at sub-organismal levels resolves controversy on pro-cooperation mechanisms

    Wenying Shou
    Building on previous work (Momeni et al., 2013), it is shown that recognizing the hierarchical organization of biological systems resolves the ongoing controversy on pro-cooperation mechanisms.

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