Full-length prepro-alpha-factor can be translocated across the mammalian microsomal membrane only if translation has not terminated. [PDF]
, 1988 We have previously shown that fully synthesized prepro-alpha-factor (pp alpha F), the precursor for the yeast pheromone alpha-factor, can be translocated posttranslationally across yeast rough microsomal (RM) membranes from a soluble, ribosome-free pool.
Garcia, PD, Walter, P
core
Structural characterization of ribosome recruitment and translocation by type IV IRES
eLife, 2016 Viral mRNA sequences with a type IV IRES are able to initiate translation without any host initiation factors. Initial recruitment of the small ribosomal subunit as well as two translocation steps before the first peptidyl transfer are essential for the ...
Jason Murray +5 more
doaj +1 more source
Thermodynamic and kinetic insights into stop codon recognition by release factor 1. [PDF]
, 2014 Stop codon recognition is a crucial event during translation termination and is performed by class I release factors (RF1 and RF2 in bacterial cells). Recent crystal structures showed that stop codon recognition is achieved mainly through a network of ...
Joseph, Simpson +2 more
core
Ribosome Flow Model with Extended Objects [PDF]
arXiv, 2017 We study a deterministic mechanistic model for the flow of ribosomes along the mRNA molecule, called the ribosome flow model with extended objects (RFMEO). This model encapsulates many realistic features of translation including non-homogeneous transition rates along the mRNA, the fact that every ribosome covers several codons, and the fact that ...
arxiv
Antibiotic resistance evolved via inactivation of a ribosomal RNA methylating enzyme. [PDF]
, 2016 Modifications of the bacterial ribosome regulate the function of the ribosome and modulate its susceptibility to antibiotics. By modifying a highly conserved adenosine A2503 in 23S rRNA, methylating enzyme Cfr confers resistance to a range of ribosome ...
Fujimori, Danica Galonić +3 more
core
Slowing translation to avoid ribosome population extinction and maintain stable allocation at slow growth rates [PDF]
arXivTo double the cellular population of ribosomes, a fraction of the active ribosomes is allocated to synthesize ribosomal proteins. Subsequently, these ribosomal proteins enter the ribosome self-assembly process, synthesizing new ribosomes and forming the well-known ribosome autocatalytic subcycle.
arxiv
Mass spectrometry and ribosome profiling, a perfect combination towards a more comprehensive identification strategy of true in vivo protein forms [PDF]
, 2013 An increasing number of studies involve integrative analysis of gene and protein expression data, taking advantage of new technologies such as next-generation transcriptome sequencing (RNA-Seq) and highly sensitive mass spectrometry (MS).
Crappé, Jeroen +5 more
core
eLife, 2017 The eukaryotic pre-initiation complex (PIC) bearing the eIF2·GTP·Met-tRNAiMet ternary complex (TC) scans the mRNA for an AUG codon in favorable context.
Jyothsna Visweswaraiah +1 more
doaj +1 more source
Computer simulations of the bacterial ribosome using a general purpose coarse-grained model MARTINI [PDF]
arXivRibosomes are critical biomolecular nanomachines responsible for protein synthesis in all known organisms. The function and dynamics of ribosomes can be studied using molecular dynamics computer simulations. Although this task remains challenging at atomic level, several studies have reported all-atom molecular dynamics simulations of the entire ...
arxiv
Dynamics of ribosomes and release factors during translation termination in E. coli
eLife, 2018 Release factors RF1 and RF2 promote hydrolysis of peptidyl-tRNA during translation termination. The GTPase RF3 promotes recycling of RF1 and RF2. Using single molecule FRET and biochemical assays, we show that ribosome termination complexes that carry ...
Sarah Adio +8 more
doaj +1 more source