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Genome-wide analysis of the Dof transcription factors in castor bean (Ricinus communis L.)
Zhengwei Jin,Aizhong Liu,Umashankar Chandrasekaran 한국유전학회 2014 Genes & Genomics Vol.36 No.4
DNA binding with one finger (Dof) transcriptionfactors are unique in plants, characteristically composedof a Dof domain in structure, functionally involvedin mediating many processes of plant growth and development. In this study, we report a genome-wide analysisfor Dof gene family in castor bean (Ricinus communis L.,Euphorbiaceae) genome. In total, 21 RcDof genes wereidentified and their constructional characterization, classesand phylogenetic relationships were documented. Theexpression profiles of the 21 RcDof genes among differenttissues were inspected using the high throughput RNA-Seqdata. Finally, SqRT-PCR analysis was performed to test thetranscriptional responses of the 21 RcDof genes to abscisicacid (ABA) and/or gibberellic acid (GA) signals, resultingin the identification of 18 RcDof genes responsive to ABAand/or GA signals. Thus, this study would provide basicinformation in understanding the molecular basis of theRcDof family and their potential function in regulating thegrowth and development of castor bean.
Xu Jin,Jin Dandan,Wang Zhengwei 한국미생물·생명공학회 2024 Journal of microbiology and biotechnology Vol.34 No.6
The accurate and rapid detection of methicillin-resistant Staphylococcus aureus (MRSA) holds significant clinical importance. This work presents a new method for detecting methicillin-resistant Staphylococcus aureus (S. aureus) in clinical samples. The method uses an aptamer-based colorimetric assay that combines a recognizing probe to identify the target and split DNAzyme to amplify the signal, resulting in a highly sensitive and direct analysis of methicillin-resistance. The identification of the PBP2a protein on the membrane of S. aureus in clinical samples leads to the allosterism of the recognizing probe, and thus provides a template for the proximity ligation of split DNAzyme. The proximity ligation of split DNAzyme forms an intact DNAzyme to identify the loop section in the L probe and generates a nicking site to release the loop sequence (“3” and “4” fragments). The “3” and “4” fragments forms an intact sequence to induce the catalytic hairpin assembly, exposing the G-rich section. The released the G-rich sequence of LR probe induces the formation of G-quadruplex–hemin DNAzyme as a colorimetric signal readout. The absorption intensity demonstrated a strong linear association with the logarithm of the S. aureus concentration across a wide range of 5 orders of magnitude dynamic range under the optimized experimental parameters. The limit of detection was calculated to be 23 CFU/ml and the method showed high selectivity for MRSA.