Trans-acting siRNA (abbreviated "ta-siRNA" or "tasiRNA") are a class of small interfering RNA (siRNA) that repress gene expression through post-transcriptional gene silencing in land plants.

反式作用 干扰小RNA （ta-siRNAs）是由miRNA介导生成、长度为21个碱基的小RNA。 ta-siRNA的产生需要由miRNA的剪切引发，之后通过 siRNA 途径形成。 ta-siRNA来自于TAS基因的转录本，通过特异的miRNA引导的切割产生21nt的ta-siRNA，miRNA引导的切割在ta-siRNA的生成 …

2022年6月24日 · We show that two phased 21–nucleotide (nt) trans-acting small interfering RNA3a RNAs (tasi-RNA) derived from TAS3a and synthesized within 3 hours of pathogen infection are the early mobile signal in SAR. TAS3a undergoes alternate polyadenylation, resulting in the generation of 555- and 367-nt transcripts.

反式作用干擾小RNA（Trans-acting siRNA，簡稱tasiRNA）是陸生植物的一類小干擾RNA（siRNA），可進行RNA干擾，抑制其他基因的表現 [1] [2] [3] 。

Formation of trans-acting small interfering RNAs (ta-siRNAs) from the TAS3 precursor is triggered by the AGO7/miR390 complex, which primes TAS3 for conversion into double-stranded RNA by the RNA-dependent RNA polymerase RDR6 and SGS3. These ta-siRNAs control several aspects of plant development.

2014年4月1日 · With 583 pathways from 18 species, tasiRNAdb is the largest resource for known ta-siRNA regulatory pathways currently available. tasiRNAdb also provides a tool named TasExpAnalysis that was developed to map user-submitted small RNA and degradome libraries to a stored/input TAS and to perform sRNA phasing analysis and TAS cleavage analysis.

In plants, miRNAs and siRNAs, such as transacting siRNAs (ta-siRNAs), affect their targets through distinct regulatory mechanisms. In this study, the expression profiles of small RNAs (smRNAs) in Arabidopsis plants subjected to drought, cold, and high-salinity stress were analyzed using 454 DNA sequencing technology.

2022年6月24日 · We show that two phased 21-nucleotide (nt) trans-acting small interfering RNA3a RNAs (tasi-RNA) derived from TAS3a and synthesized within 3 hours of pathogen infection are the early mobile signal in SAR. TAS3a undergoes alternate polyadenylation, resulting in the generation of 555- and 367-nt transcripts.

Trans-acting siRNAs (tasiRNA) are a family of phasiRNA derived from TAS locus and are reported in plant development (Ding et al., 2020; Liu et al., 2020). miR390-AGO7 target transcript mediate the generation of TAS3 tasiRNA which targets ARF family to regulate flower architecture, somatic embryogenesis, vegetative to reproductive phase ...

2017年4月24日 · miR390是植物中非常保守的miRNA之一 ，它通过作用在TAS3（trans-acting siRNA gene）上诱导产生21个碱基长的tasiRNA（trans-acting siRNA），从而靶向ARF（Auxin Responsive Factor）基因。...