Abstract: A composition comprising a CRISPR nuclease, where the nuclease includes a sequence with at least 60% sequence identity to any one of SEQ ID NOs: 143-177 and 229, optionally also including a guide nucleic acid (gNA), such as a guide ribonucleic acid (gRNA) and, in some cases, a donor sequence. Also include are methods of creating a strand break at or near a target sequence in a target polynucleotide by contacting the target polynucleotide with a nuclease including a sequence with at least 60% sequence identity to any one of SEQ ID NOs: 143-177 and 229, and a compatible guide nucleic acid (gNA), such as a guide ribonucleic acid (gRNA).

Abstract: A composition comprising a CRISPR nuclease, where the nuclease includes a sequence with at least 60% sequence identity to any one of SEQ ID NOs: 143-177 and 229, optionally also including a guide nucleic acid (gNA), such as a guide ribonucleic acid (gRNA) and, in some cases, a donor sequence. Also include are methods of creating a strand break at or near a target sequence in a target polynucleotide by contacting the target polynucleotide with a nuclease including a sequence with at least 60% sequence identity to any one of SEQ ID NOs: 143-177 and 229, and a compatible guide nucleic acid (gNA), such as a guide ribonucleic acid (gRNA).

Abstract: Embodiments of the present disclosure relate to engineered chimeric nucleic acid guided nucleases for improved targeted gene editing. In certain embodiments, the engineered chimeric nucleic acid guided nucleases can be used for genome editing. In accordance with these embodiments, a targeted genome can be edited by one or more of the engineered chimeric nucleic acid guided nucleases comprising one or more nucleic acid or amino acid constructs represented by one or more of SEQ ID NO:1 to SEQ ID NO:9 or a polypeptide encoded thereof. In certain embodiments, the engineered chimeric nucleic acid guided nucleases can be used to remove, edit, and/or insert genes into a targeted genome. In other embodiments, use of these chimeras can be for producing a targeted result (e.g. removing, editing or replacing a defective gene) in a subject to reduce the onset of or prevent a condition.

Abstract: Embodiments of the present disclosure relate to methods for creating and using engineered chimeric nucleic acid guided nuclease libraries for improved and commercially viable nuclease constructs for targeted and improved gene editing. In certain embodiments, libraries of chimeric nucleases having modules derived from two, three or more Cas12a-type species can be constructed to form chimeras representing two or more different species. In some embodiments, engineered libraries disclosed herein can be used for rapid production, identification and use for improved targeted genomic editing in a subject. In other embodiments, PAM sequence recognition by a native Cas12a-type nuclease can be selected against in libraries disclosed herein creating novel Cas12a-like chimeric nuclease libraries having increased targeting capabilities across species for improved genomic editing efficiency, reducing off-targeting and/or creating expanded target specificity.

Abstract: This invention belongs to the field of biochemical engineering and relates to a method of cyclic utilization of water during separation of succinic acid made by fermentation. This invention uses water from separation process for aerobic growth of E. coli AFP111 and production of succinic acid by anaerobic fermentation, obtaining final succinic acid concentration of 55 g/L and yield of 91.6%. Compared with results of fermentation using culture medium prepared from tap water, succinic acid concentration and productivity increased by 8.5% and 8.46%, respectively. An outstanding advantage of this invention is recovery and utilization of evaporated water during separation of succinic acid, realizing cyclic use of water during industrial production of succinic acid, which is an environment-friendly process.

Abstract: This invention belongs to the field of biochemical engineering and relates to a method of cyclic utilization of water during separation of succinic acid made by fermentation. This invention uses water from separation process for aerobic growth of E.coli AFP111 and production of succinic acid by anaerobic fermentation, obtaining final succinic acid concentration of 55 g/L and yield of 91.6%. Compared with results of fermentation using culture medium prepared from tap water, succinic acid concentration and productivity increased by 8.5% and 8.46%, respectively. An outstanding advantage of this invention is recovery and utilization of evaporated water during separation of succinic acid, realizing cyclic use of water during industrial production of succinic acid, which is an environment-friendly process.