摘要:
Some aspects of the present disclosure provide methods for evolving recombinases to recognize target sequences that differ from the canonical recognition sequences. Some aspects of this disclosure provide evolved recombinases, e.g., recombinases that bind and recombine naturally-occurring target sequences, such as, e.g., target sequences within the human Rosa26 locus. Methods for using such recombinases for genetically engineering nucleic acid molecules in vitro and in vivo are also provided. Some aspects of this disclosure also provide libraries and screening methods for assessing the target site preferences of recombinases, as well as methods for selecting recombinases that bind and recombine a non- canonical target sequence with high specificity.
摘要:
Liquid storage solutions comprising polymerases are provided. In some embodiments, provided herein are liquid storage solution for storing a polynucleotide manipulating enzyme (e.g., a polymerase or other enzyme as described herein). In some embodiments, the solution comprises, the enzyme (e.g., polymerase orrestriction enzyme); free arginine or a salt thereof or an arginine derivative (for example, but not limited to arginine ethyl ester, argininainide dihydrochloride) or a salt thereof; and 5% or more cryoprotectant.
摘要:
The present invention relates to influenza A virus variants, particularly variants that are resistant to a polymerase inhibitors. Also provided are methods and compositions related to the influenza A virus variants. Further provided are methods of isolating, identifying, and characterizing multiple viral variants from a patient.
摘要:
Hyperactive Hermes Transposase mutants and genes encoding them are disclosed. These transposases are easily purified in large quantity after expression in bacteria. The modified Hermes Transposases are soluble and stable and exist as smaller active complexes compared to the native enzyme. The consensus target DNA recognition sequence is the same as the native enzyme and shows minimal insertional sequence bias. These properties are useful in whole genome sequencing applications that involve sample DNA preparation requiring simultaneous fragmentation and attachment of custom sequences to the ends of the fragments. Methods and compositions using these transposases in fragmentation and 5' end-tagging are also disclosed.
摘要:
Amplification reaction mixtures comprising a cationic surfactant and an anionic surfactant are provided. Provided herein is a solution for storing a polymerase. In some embodiments, the solution comprises a polymerase; an anionic surfactant; and a cationic surfactant. In some embodiments, the concentration of the anionic surfactant and the cationic surfactant is between 0.0001 % and 0.1%. In some embodiments, the anionic detergent is sodium dodecyl sulfate (SDS). In some embodiments, the cationic detergent is cetyl trimethylammonium bromide (CTAB). In some embodiments, the anionic detergent is SDS and the cationic detergent is CTA 13.
摘要:
The present invention provides polynucleotide vectors for high expression of heterologous genes, and methods for constructing such vectors. Some vectors further comprise novel transposons and transposases that further improve expression. Further disclosed are vectors that can be used in a gene transfer system for stably introducing nucleic acids into the DNA of a cell. The gene transfer systems can be used in methods, for example, but not limited to, gene expression, gene therapy, insertional mutagenesis, or gene discovery.
摘要:
Disclosed are genetic delivery systems that utilize genetic elements of the piggyBac family transposon system, and methods of introducing nucleic acid into target cells using the genetic delivery systems.
摘要:
Disclosed herein are conjugates comprising a biomolecule linked to a label that have biological activity and are useful in a wide variety of biological applications. For example, provided herein are polymerase-nanoparticle conjugates including a polymerase linked to a nanoparticle, wherein the conjugate has polymerase activity. Such conjugates can exhibit reduced aggregation and improved stochiometries wherein the average biomolecule: nanoparticle ratio approaches or equals 1 :1. Also disclosed herein are improved methods for preparing such conjugates, and methods and systems for using such conjugates in biological applications such as nucleotide incorporation, primer extension and single molecule sequencing.
摘要:
Disclosed herein are modified polymerase compositions exhibiting altered polymerase activity, which can be useful in a variety of biological applications. Also disclosed herein are methods of making and using such compositions. In some embodiments, the compositions exhibit altered properties that can enhance their utility in a variety of biological applications. Such altered properties, can include, for example, altered nucleotide binding affinities, altered nucleotide incorporation kinetics, altered photostability and/or altered nanoparticle tolerance, as well as a range of other properties as disclosed herein.