19 results found
    1. Biochemistry and Chemical Biology
    2. Microbiology and Infectious Disease

    Polypyrimidine tract binding protein 1 protects mRNAs from recognition by the nonsense-mediated mRNA decay pathway

    Zhiyun Ge et al.
    The RNA-binding protein PTBP1 is recruited to sites near stop codons in retroviral and human mRNAs, shielding them from detection and degradation by the nonsense-mediated mRNA decay pathway.
    1. Developmental Biology
    2. Evolutionary Biology

    Domestic chickens activate a piRNA defense against avian leukosis virus

    Yu Huining Sun et al.
    To protect the germ line genome, chickens acquire new small RNA-based immune defense in response to recently endogenized retroviruses by turning a truncated provirus into a weapon.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Crystal structure of an HIV assembly and maturation switch

    Jonathan M Wagner et al.
    Folding and unfolding of a 6-helix bundle controls HIV assembly and maturation.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    ULK3 regulates cytokinetic abscission by phosphorylating ESCRT-III proteins

    Anna Caballe et al.
    ULK3 is a kinase in the abscission checkpoint that temporarily inactivates ESCRT-III proteins via phosphorylation, which is required to delay cytokinesis in response to defects in mitosis.
    1. Developmental Biology

    Mechanism and consequence of abnormal calcium homeostasis in Rett syndrome astrocytes

    Qiping Dong et al.
    Increased spontaneous calcium activity in Rett syndrome astrocytes is a key cell-autonomous phenotype that affects synaptic function and network activity.
    1. Cell Biology

    RalB directly triggers invasion downstream Ras by mobilizing the Wave complex

    Giulia Zago et al.
    By moving from correlations to causality in cancer signal transduction using optogenetics, the sufficiency of RalB activation to trigger invasion and the underlying molecular mechanisms were established.
    1. Microbiology and Infectious Disease

    N6-methyladenosine of HIV-1 RNA regulates viral infection and HIV-1 Gag protein expression

    Nagaraja Tirumuru et al.
    Human proteins that add or remove the methyladenosine modification of cellular RNA, or recognize methylated RNA significantly affect HIV-1 infection or viral protein synthesis in cells, suggesting an important role for HIV-1 RNA methylation in regulating viral replication.
    1. Cell Biology

    Phase transitioned nuclear Oskar promotes cell division of Drosophila primordial germ cells

    Kathryn E Kistler et al.
    The scaffolding protein Oskar organizes two types of germ granules by phase transition within the same cell but with distinct morphologies, composition and biological functions.
    1. Cell Biology
    2. Human Biology and Medicine

    Mechanism and preclinical prevention of increased breast cancer risk caused by pregnancy

    Svasti Haricharan et al.
    The transcription factor STAT5 mediates the increased breast cancer risk associated with a late age pregnancy, but intermittent anti-STAT5 treatment can lower this risk and thus prevent breast cancer.
    1. Biochemistry and Chemical Biology
    2. Plant Biology

    Limitations to photosynthesis by proton motive force-induced photosystem II photodamage

    Geoffry A Davis et al.
    Storage of solar energy in the thylakoid electrical field by photosynthesis in vivo can substantially destabilize charge-separated states in photosystem II, leading to singlet oxygen production and photodamage, contributing to loss of productivity, especially under fluctuating light experienced in the field.

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