3,867 results found
    1. Biochemistry and Chemical Biology
    2. Structural Biology and Molecular Biophysics

    Structures of the scanning and engaged states of the mammalian SRP-ribosome complex

    Rebecca M Voorhees, Ramanujan S Hegde
    Structures of the signal recognition particle before and after it captures a transmembrane domain suggest how it chooses, engages, and shields its clients during membrane protein targeting to the endoplasmic reticulum.
    1. Cell Biology

    Two subunits of human ORC are dispensable for DNA replication and proliferation

    Etsuko Shibata et al.
    Human cell lines replicate and proliferate without ORC1 or ORC2, two subunits of the replication initiator protein complex ORC, which has till now been considered essential for DNA replication.
    1. Biochemistry and Chemical Biology
    2. Computational and Systems Biology

    ATP-induced asymmetric pre-protein folding as a driver of protein translocation through the Sec machinery

    Robin A Corey et al.
    How the process of protein folding may be controlled by the Sec machinery to assist protein transport across membranes.
    1. Structural Biology and Molecular Biophysics

    Architectural principles for Hfq/Crc-mediated regulation of gene expression

    Xue Yuan Pei et al.
    Structural insights show how RNA chaperones cooperate to recognise defined target transcripts and suppress gene expression.
    1. Biochemistry and Chemical Biology
    2. Chromosomes and Gene Expression

    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

    Inter-membrane association of the Sec and BAM translocons for bacterial outer-membrane biogenesis

    Sara Alvira et al.
    The protein translocation apparatus of the inner- (Sec) and outer-membrane (BAM) interact to form a trans-periplasmic super-complex capable of long-range, PMF-dependent conformational changes to facilitate efficient outer-membrane protein maturation.
    1. Chromosomes and Gene Expression

    The chromatin remodelers RSC and ISW1 display functional and chromatin-based promoter antagonism

    Timothy J Parnell et al.
    A combination of genetics, expression, genomic localization, and genomic nucleosome profiling demonstrates antagonism between two chromatin remodelers that reveal different mechanisms at different promoter architectures.
    1. Chromosomes and Gene Expression

    Human ORC/MCM density is low in active genes and correlates with replication time but does not delimit initiation zones

    Nina Kirstein et al.
    Replication origins are established throughout the genome with the exception of transcribed genes, and the local chromatin composition likely modulates the density of ORC and MCM as well as origin activation.
    1. Biochemistry and Chemical Biology

    Efficient analysis of mammalian polysomes in cells and tissues using Ribo Mega-SEC

    Harunori Yoshikawa et al.
    Translationally active polysomes from mammalian cells/tissues are successfully separated with rapidity, high efficiency and exceptional reproducibility by a SEC-based approach, an accessible alternative to the conventional sucrose density gradient analysis.
    1. Biochemistry and Chemical Biology
    2. Cell Biology

    The translational landscape of the splicing factor SRSF1 and its role in mitosis

    Magdalena M Maslon et al.
    Identifying the translational targets of the shuttling protein, SRSF1, reveals that it is needed for normal cell division, and suggests that it couples pre-mRNA splicing and translation.

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