Abstract:
The present disclosure provide novel variants of T7 RNA polymerase. Embodiments of T7 variants, according to the instant invention, include a Cysteine-Serine substitution on position 723 of the amino acid sequence of the T7 polypeptide. Embodiments of T7 variants according to the instant invention have a DNA-dependent RNA polymerase enzymatic activity and a reduced tendency to form intramolecular homodimers by way of oxidizing thiol groups. The amino acid substitutions within the T7 variants disclosed herein impact minimally, if at all, the RNA polymerase activity of the T7 polypeptide. Further, the mutations of the disclosed embodiments may optionally be combined with mutations which provide enhanced thermostability compared to the wild-type reference.
Abstract:
The present invention provides a method for monitoring of profile changes of components in a dynamic system such as a cell-free in vitro protein synthesis system by using liquid chromatography (LC) combined with mass spectrometry (MS). In an additional aspect, this invention provides a method for enhancing the yield and/or reproducibility in a cell-free protein synthesis system by modulating the level and/or activity of a protein component that has regulatory effects on the system.
Abstract:
Recombinant negative-strand viral RNA templates are described which may be used with purified RNA-directed RNA polymerase complex to express heterologous gene products in appropriate host cells and/or to rescue the heterologous gene in virus particles. The RNA templates are prepared by transcription of appropriate DNA sequences with a DNA-directed RNA polymerase. The resulting RNA templates are of the negative-polarity and contain appropriate terminal sequences which enable the viral RNA-synthesizing apparatus to recognize the template. Bicistronic mRNAs can be constructed to permit internal initiation of translation of viral sequences and allow for the expression of foreign protein coding sequences from the regular terminal initiation site, or vice versa
Abstract:
The present invention relates to compositions and methods for controlling nematode infestation of plants or animals. In particular, the present invention provides vectors comprising sequences designed to control nematodes by RNA interference (RNAi) and transgenic plants transformed with such vectors.
Abstract:
The invention relates to new methods for synthesising polynucleotide molecules according to a predefined nucleotide sequence. The invention also relates to methods for the assembly of synthetic polynucleotides following synthesis, as well as systems and kits for performing the synthesis and/or assembly methods.
Abstract:
Some aspects of this disclosure provide methods for phage-assisted continuous evolution (PACE) of proteases. Some aspects of this invention provide methods for evaluating and selecting protease inhibitors based on the likelihood of the emergence of resistant proteases as determined by the protease PACE methods provided herein. Some aspects of this disclosure provide strategies, methods, and reagents for protease PACE, including fusion proteins for translating a desired protease activity into a selective advantage for phage particles encoding a protease exhibiting such an activity and improved mutagenesis-promoting expression constructs. Evolved proteases that recognize target cleavage sites which differ from their canonical cleavage site are also provided herein.
Abstract:
Provided herein, in one aspect, is a composition for in vitro transcription and translation, comprising: a treated cell lysate derived from one or more host cells such as bacteria, archaea, plant or animal; a plurality of supplements for gene transcription and translation; an energy recycling system for providing and recycling adenosine triphosphate (ATP); and one or more exogenous additives. Methods for making and using the same are also provided.
Abstract:
The present invention relates to heat-repressible split-T7 polymerases comprising temperature-sensitive domains of Tlpa protein fused with split T7 RNA polymerase (T7RNAP) to introduce thermal control into widely used T7 RNA polymerase, creating a heat-repressible Thermal-T7RNAP system. The invention further provides polynucleotides encoding the heat-repressible split-T7 polymerases, and methods of thermal control of bioproduction.
Abstract:
The present invention provides methods for large-scale production of a composition enriched for full-length mRNA molecules using an SP6 RNA polymerase and compositions produced using such methods and uses thereof.
Abstract:
The present disclosure relates to cap analogs, which can result in high levels of capping efficiency and transcription and improved translation efficiencies. The present disclosure also relates to methods useful for preparing cap analogs and using mRNA species containing such analogs, as well as kits containing the novel cap analogs.