865 results found
    1. Cancer Biology

    BRET-based RAS biosensors that show a novel small molecule is an inhibitor of RAS-effector protein-protein interactions

    Nicolas Bery et al.
    A biosensor resource has been developed to monitor the intracellular interactions of RAS family proteins with effector molecules and the effects of inhibitors as an aid to drug development.
    1. Developmental Biology
    2. Cancer Biology

    MicroRNA-203 represses selection and expansion of oncogenic Hras transformed tumor initiating cells

    Kent Riemondy et al.
    Inhibition of microRNA-203 by oncogenic HRas mutations promotes skin cancer initiation.
    1. Developmental Biology
    2. Cancer Biology

    The acinar differentiation determinant PTF1A inhibits initiation of pancreatic ductal adenocarcinoma

    Nathan M Krah et al.
    By regulating acinar cell differentiation, the transcription factor PTF1A acts as a novel class of tumor suppressor in pancreatic cancer.
    1. Chromosomes and Gene Expression
    2. Genetics and Genomics

    KRAB-zinc finger protein gene expansion in response to active retrotransposons in the murine lineage

    Gernot Wolf et al.
    Unbiased ChIP-seq screens and genetic knockouts of large Kruppel associated box zinc finger protein (KRAB-ZFP) clusters reveal that evolutionarily young KRAB-ZFPs play a redundant role in retrotransposon restriction in mice.
    1. Structural Biology and Molecular Biophysics

    Structural analysis of autoinhibition in the Ras-specific exchange factor RasGRP1

    Jeffrey S Iwig et al.
    A key activator of Ras signaling adopts an autoinhibited, dimeric conformation that is activated by membrane and calcium binding.
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    A Histidine pH sensor regulates activation of the Ras-specific guanine nucleotide exchange factor RasGRP1

    Yvonne Vercoulen et al.
    The Ras activator RasGRP1 that impacts Ras signals in immune cells, leukemias, and colorectal cancer, switches to an active conformation aided by a pH-sensitive histidine residue in a central location of the RasGRP1 molecule.
    1. Cancer Biology

    KRAS-dependent sorting of miRNA to exosomes

    Diana J Cha et al.
    In isogenically matched colorectal cancer (CRC) cell lines, mutant KRAS alters the composition of secreted miRNAs in extracellular vesicles that can then transfer repressive activity to wild type cells.
    1. Structural Biology and Molecular Biophysics
    2. Cell Biology

    Specific cancer-associated mutations in the switch III region of Ras increase tumorigenicity by nanocluster augmentation

    Maja Šolman et al.
    Rare mutations in the switch III region of Ras can increase its nanoscale clustering, which enhances effector recruitment and downstream signaling.
    1. Physics of Living Systems
    2. Structural Biology and Molecular Biophysics

    High-throughput, single-particle tracking reveals nested membrane domains that dictate KRasG12D diffusion and trafficking

    Yerim Lee et al.
    The nanoscopic landscape of the membrane has a direct impact on the spatiotemporal, and likely also the signaling, dynamics of Ras proteins.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    Mapping the functional versatility and fragility of Ras GTPase signaling circuits through in vitro network reconstitution

    Scott M Coyle, Wendell A Lim
    A systems level reconstitution of H-Ras GTPase signaling reveals a rich space of tunable dynamic outputs and clarifies the consequences of oncogenic perturbations to signaling.

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