Studies of Escherichia coli 30S ribosomal subunit assembly have revealed a hierarchical and cooperative association of ribosomal proteins with 16S ribosomal RNA; these results have been used to compile an in vitro 30S subunit assembly map. In single protein addition and omission studies, ribosomal protein S13 was shown to be dependent on the prior association of ribosomal protein S20 for bindin...

Individual ribosomal proteins S4, S9 and S13 were tested for their ability to interact with tRNA and synthetic polynucleotides. All three proteins bind to immobilized to Sepharose poly(A) and poly(U), while S4 and S13 form stoichiometric (1:1) complexes with tRNA in solution. We show that only the polynucleotide X S13 complexes are able to select their cognate tRNAs. In particular, the affinity...

BACKGROUND Unprecedented progresses in high-throughput DNA sequencing and de novo gene synthesis technologies have allowed us to create living organisms in the absence of natural template. METHODOLOGY/PRINCIPAL FINDINGS The sequence of wild-type S13 phage genome was downloaded from GenBank. Two synonymous mutations were introduced into wt-S13 genome to generate m1-S13 genome. Another mutant, ...

In this work two dimensional graphene flakes were used to prepare new electrolytes for dye sensitized solar cells (DSSCs). Small amounts (up to 3 wt%) of graphene nanoflakes were suspended into the ionic liquid (IL) 1-propyl-3-methyl imidazolium iodide (PMII) to produce new electrolytes. The use of these electrolytes in DSSCs resulted in more than twenty five times improvement of the solar cell...

Ribosome crystal structures have revealed that two small subunit proteins, S9 and S13, have C-terminal tails, which, together with several features of 16S rRNA, contact the anticodon stem-loop of P-site tRNA. To test the functional importance of these protein tails, we created genomic deletions of the C-terminal regions of S9 and S13. All of the tail deletions, including double mutants containi...

We have investigated the in vitro effects of the cytokine leukemia inhibitory factor (LIF) on normal murine hematopoietic progenitors by measuring recovery and retroviral vector infection efficiency of 13-day posttransplant, spleen-colony-forming cell (CFU-S 13) in short-term culture. Up to a twofold increase in CFU-S13 recovery was observed, from 9.7 x 10(-5) cells in untreated controls to 17....

Abstract—Fibrin degradation is an important part in prevention or treatment of intravascular thrombosis and cardiovascular diseases. Plasmin like fibrinolytic enzymes has given new hope to patient with cardiovascular diseases by treating fibrin aggregation related diseases with traditional plasminogen activator which have many side effects. Various researches involving wide range of sources for...

Previous work has shown that the obligate intracellular amoebal endosymbiont Neochlamydia S13, an environmental chlamydia strain, has an amoebal infection rate of 100%, but does not cause amoebal lysis and lacks transferability to other host amoebae. The underlying mechanism for these observations remains unknown. In this study, we found that the host amoeba could completely evade Legionella in...

Heat shock protein 90 (Hsp90), whose inhibitors have shown promising activity in clinical trials, is an attractive anticancer target. In this work, we first explored the significant pharmacophore features needed for Hsp90 inhibitors by generating a 3D-QSAR pharmacophore model. It was then used to virtually screen the SPECS databases, identifying 17 hits. Compound S1 and S13 exhibited the most p...