706 results found
    1. Biochemistry and Chemical Biology
    2. Genes and Chromosomes

    SMC condensin entraps chromosomal DNA by an ATP hydrolysis dependent loading mechanism in Bacillus subtilis

    Larissa Wilhelm et al.
    The Smc–ScpAB complex-a prokaryotic ancestor of cohesin, condensin and Smc5/6-loads onto the bacterial chromosome by employing ATP hydrolysis to capture DNA fibers within its tripartite ring.
    1. Biochemistry and Chemical Biology
    2. Biophysics and Structural Biology

    Structural basis for the recognition of spliceosomal SmN/B/B’ proteins by the RBM5 OCRE domain in splicing regulation

    André Mourão et al.
    Interactions with Sm proteins can provide a way in which regulatory factors can modulate alternative splice site choices.
    1. Biochemistry and Chemical Biology

    Action of CMG with strand-specific DNA blocks supports an internal unwinding mode for the eukaryotic replicative helicase

    Lance Langston, Mike O’Donnell
    The CMG complex, the replicative helicase in eukaryotes, uses a different mechanism from bacterial and viral helicases by engaging both strands of parental DNA with substantial force and unwinding the duplex within the central channel of CMG.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    SM proteins Sly1 and Vps33 co-assemble with Sec17 and SNARE complexes to oppose SNARE disassembly by Sec18

    Braden T Lobingier et al.
    Sec1/Munc18 (SM) proteins shield SNARE complexes from NSF/Sec18-mediated disassembly through cooperative binding interactions with SNARE complexes and the universal co-chaperone α-SNAP/Sec17.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The prenyltransferase UBIAD1 is the target of geranylgeraniol in degradation of HMG CoA reductase

    Marc M Schumacher et al.
    The inhibition of sterol-accelerated degradation of HMG CoA reductase by the vitamin K2 synthetic enzyme UBIAD1 may contribute to the accumulation of cholesterol that is associated with Schnyder corneal dystrophy.
    1. Biochemistry and Chemical Biology
    2. Genes and Chromosomes

    Mcm10 promotes rapid isomerization of CMG-DNA for replisome bypass of lagging strand DNA blocks

    Lance D Langston et al.
    Biochemical data demonstrate an unexpected and critical function for the enigmatic Mcm10 protein in helping the eukaryotic CMG helicase/replisome bypass roadblocks on the DNA that may also explain Mcm10 function at origins of replication.
    1. Developmental Biology and Stem Cells

    Patched1 and Patched2 inhibit Smoothened non-cell autonomously

    Brock Roberts et al.
    Ptch1/2 can lower the sensitivity of Smo to activation by Shh via the secretion of a sterol precursor.
    1. Genes and Chromosomes

    MukB ATPases are regulated independently by the N- and C-terminal domains of MukF kleisin

    Katarzyna Zawadzka et al.
    In Escherichia coli structural maintenance of chromosomes (SMC) complex, MukBEF, a dimeric MukF kleisin binds and activates MukB SMC ATPases through two independent interfaces provided by distinct MukF N- and C-terminal domains.
    1. Neuroscience

    Decreased microRNA levels lead to deleterious increases in neuronal M2 muscarinic receptors in Spinal Muscular Atrophy models

    Patrick J O'Hern et al.
    In invertebrate and vertebrate models of Spinal Muscular Atrophy, diminished SMN protein causes Gemin3-dependent decreases in microRNA function, leading to upregulated M2 muscarinic receptor and deleterious consequences.
    1. Biochemistry and Chemical Biology
    2. Biophysics and Structural Biology

    DNA binding polarity, dimerization, and ATPase ring remodeling in the CMG helicase of the eukaryotic replisome

    Alessandro Costa et al.
    The Mcm2-7 motor unwinds DNA using an approach distinct from that of superfamily III helicases, and accesses multiple ring configurations and assembly states during the initiation of DNA replication.

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