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Biosynthesis

Ta-siRNAs arise from non coding transcripts through miRNA guided cleavage and conversion to double stranded RNA by the RNA-dependent RNA polymerase RDR6 and suppressor of gene silencing 3 (SGS3).^[1] The resulting dsRNA is further processed by dicer-like enzyme 4 (DCL4) to produce a phased array of 21-nt siRNAs.^[2]^[3]

Model for ta-siRNA biosynthesis initiation from Allen paper. Practice adding image here.

Text for refs < ref name=xyz>YOUR SOURCE</ref> ref tags

Presence of ta-siRNAs

The presence of ta-siRNAs was originally detected in the flowering plant Arabidopsis ^[3]. Evidence of ta-siRNAs has also been found in the moss Physcomitrella patens ^[1], maize ^[4], and a strain of Oryza sativa rice. ^[5]^[4]

References

^ ^a ^b Talmor-Neiman M, Stav R, Klipcan L, Buxdorf K, Baulcombe DC, Arazi T (November 2006). "Identification of trans-acting siRNAs in moss and an RNA-dependent RNA polymerase required for their biogenesis". Plant J. 48 (4): 511–21. doi:10.1111/j.1365-313X.2006.02895.x. PMID 17076803.{{cite journal}}: CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
^ Xie Z, Qi X (November 2008). "Diverse small RNA-directed silencing pathways in plants". Biochim. Biophys. Acta. 1779 (11): 720–4. doi:10.1016/j.bbagrm.2008.02.009. PMID 18358247.{{cite journal}}: CS1 maint: date and year (link)
^ ^a ^b Allen E, Xie Z, Gustafson AM, Carrington JC (April 2005). "microRNA-directed phasing during trans-acting siRNA biogenesis in plants". Cell. 121 (2): 207–21. doi:10.1016/j.cell.2005.04.004. PMID 15851028.{{cite journal}}: CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
^ ^a ^b Williams L, Carles CC, Osmont KS, Fletcher JC (July 2005). "A database analysis method identifies an endogenous trans-acting short-interfering RNA that targets the Arabidopsis ARF2, ARF3, and ARF4 genes". Proc. Natl. Acad. Sci. U.S.A. 102 (27): 9703–8. doi:10.1073/pnas.0504029102. PMC 1172271. PMID 15980147.{{cite journal}}: CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)
^ Heisel SE, Zhang Y, Allen E; et al. (2008). "Characterization of unique small RNA populations from rice grain". PLOS ONE. 3 (8): e2871. doi:10.1371/journal.pone.0002871. PMC 2518513. PMID 18716673. {{cite journal}}: Explicit use of et al. in: |author= (help)CS1 maint: multiple names: authors list (link)

[TN-1] Talmor-Neiman M, Stav R, Klipcan L, Buxdorf K, Baulcombe DC, Arazi T (November 2006). "Identification of trans-acting siRNAs in moss and an RNA-dependent RNA polymerase required for their biogenesis". Plant J. 48 (4): 511–21. doi:10.1111/j.1365-313X.2006.02895.x. PMID 17076803.{{cite journal}}: CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)

[XZ-2] Xie Z, Qi X (November 2008). "Diverse small RNA-directed silencing pathways in plants". Biochim. Biophys. Acta. 1779 (11): 720–4. doi:10.1016/j.bbagrm.2008.02.009. PMID 18358247.{{cite journal}}: CS1 maint: date and year (link)

[Al-3] Allen E, Xie Z, Gustafson AM, Carrington JC (April 2005). "microRNA-directed phasing during trans-acting siRNA biogenesis in plants". Cell. 121 (2): 207–21. doi:10.1016/j.cell.2005.04.004. PMID 15851028.{{cite journal}}: CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)

[Wil-4] Williams L, Carles CC, Osmont KS, Fletcher JC (July 2005). "A database analysis method identifies an endogenous trans-acting short-interfering RNA that targets the Arabidopsis ARF2, ARF3, and ARF4 genes". Proc. Natl. Acad. Sci. U.S.A. 102 (27): 9703–8. doi:10.1073/pnas.0504029102. PMC 1172271. PMID 15980147.{{cite journal}}: CS1 maint: date and year (link) CS1 maint: multiple names: authors list (link)

[Hes-5] Heisel SE, Zhang Y, Allen E; et al. (2008). "Characterization of unique small RNA populations from rice grain". PLOS ONE. 3 (8): e2871. doi:10.1371/journal.pone.0002871. PMC 2518513. PMID 18716673. {{cite journal}}: Explicit use of et al. in: |author= (help)CS1 maint: multiple names: authors list (link)

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