Common carp expressed sequence tags （ESTs） were analyzed for the existence of microsatellites, or simple sequence repeats （SSRs）. In the NCBI dbEST database, a total of 10612 sequences were registered before Decem...Common carp expressed sequence tags （ESTs） were analyzed for the existence of microsatellites, or simple sequence repeats （SSRs）. In the NCBI dbEST database, a total of 10612 sequences were registered before December 31, 2004. A complete search of 2-6 nucleotide microsatellites resulted in the identification of 513 SSR-containing ESTs, accounting for 4.8% of the total. Cluster analysis indicated that 73 sequences of SSR-containing ESTs fell into 27 groups and the remaining 440 ESTs were independent. A total of 467 unique SSR-containing ESTs were identified. These EST-SSRs contained a vari- ety of simple sequence types, and di- and tri-nucleotide repeats were the most abundant, accounting for 42.1% and 27.9% of the whole, respectively. Of the dinucleotide repeats, CA/TG was the most abundant, followed by GA/TC. BLASTx search showed that 38.1% of the SSR loci could be associated with genes or proteins of known or unknown function. BLASTx searches of SSR-containing ESTs also showed high frequencies （98/179） of hits on zebrafish sequences.展开更多
The grass carp(Ctenopharyngodon idella) is one of the most important cultivated fish species in China.Mounting evidences suggests that microRNAs(miRNAs) may be key regulators of skeletal muscle among the grass carp,bu...The grass carp(Ctenopharyngodon idella) is one of the most important cultivated fish species in China.Mounting evidences suggests that microRNAs(miRNAs) may be key regulators of skeletal muscle among the grass carp,but the knowledge of the identity of myogenic miRNAs and role of miRNAs during skeletal muscle anabolic state remains limited.In the present study,we choose 8 miRNAs previously reported to act as muscle growth-related miRNAs for fasting-refeeding research.We investigated postprandial changes in the expression of 8 miRNAs following a single satiating meal in grass carp juveniles who had been fasting for one week and found that 7 miRNAs were sharply up-regulated within 1 or 3 h after refeeding,suggesting that they may be promising candidate miRNAs involved in a fast-response signaling system that regulates fish skeletal muscle growth.展开更多
文摘Common carp expressed sequence tags （ESTs） were analyzed for the existence of microsatellites, or simple sequence repeats （SSRs）. In the NCBI dbEST database, a total of 10612 sequences were registered before December 31, 2004. A complete search of 2-6 nucleotide microsatellites resulted in the identification of 513 SSR-containing ESTs, accounting for 4.8% of the total. Cluster analysis indicated that 73 sequences of SSR-containing ESTs fell into 27 groups and the remaining 440 ESTs were independent. A total of 467 unique SSR-containing ESTs were identified. These EST-SSRs contained a vari- ety of simple sequence types, and di- and tri-nucleotide repeats were the most abundant, accounting for 42.1% and 27.9% of the whole, respectively. Of the dinucleotide repeats, CA/TG was the most abundant, followed by GA/TC. BLASTx search showed that 38.1% of the SSR loci could be associated with genes or proteins of known or unknown function. BLASTx searches of SSR-containing ESTs also showed high frequencies （98/179） of hits on zebrafish sequences.
基金Foundation items： This study was supported by the National Natural Science Foundation of China （31230076 31340054）, the Natural Science Foundation of Hunan province （14JJ2135）and the State Key Laboratory of Freshwater Ecology and Biotechnology （2012FB01 ）
文摘The grass carp(Ctenopharyngodon idella) is one of the most important cultivated fish species in China.Mounting evidences suggests that microRNAs(miRNAs) may be key regulators of skeletal muscle among the grass carp,but the knowledge of the identity of myogenic miRNAs and role of miRNAs during skeletal muscle anabolic state remains limited.In the present study,we choose 8 miRNAs previously reported to act as muscle growth-related miRNAs for fasting-refeeding research.We investigated postprandial changes in the expression of 8 miRNAs following a single satiating meal in grass carp juveniles who had been fasting for one week and found that 7 miRNAs were sharply up-regulated within 1 or 3 h after refeeding,suggesting that they may be promising candidate miRNAs involved in a fast-response signaling system that regulates fish skeletal muscle growth.
