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. 2022 Jan 8;23(2):696. doi: 10.3390/ijms23020696

Figure 2.

Figure 2

Biogenesis of sRNAs involved in post transcriptional gene silencing and transcriptional gene silencing. (a) The micro-RNA (miRNA) pathway. (b) The inverted repeat (IR)–derived hairpin-siRNA (hp-siRNAs) pathway. (c) The natural-antisense small interfering RNA (natsiRNA) pathway. (d) The trans-acting siRNA (tasiRNA) pathway. (e) The heterochromatic siRNA (hetsiRNA) biogenesis pathway. Additional abbreviations: m7G, 7-methylguanylate cap; AAAn, polyadenine tail; CBP, CAP-BINDING PROTEIN; STA1, STABILIZED 1; DDL, DAWDLE; DCL, DICER-LIKE; HYL1, HYPONASTIC LEAVES 1; CRL1, C-TERMINAL DOMAIN PHOSPHATASE-LIKE 1; SE, SERRATE; TGH, TOUGH; HEN1, HUA ENHANCER 1; HST, HASTY; AGO, ARGONAUTE; HSP90, HEAT-SHOCK PROTEIN 90; SQN, SQUINT; DRBP, double-stranded RNA-binding protein; SGS3, SUPPRESSOR OF GENE SILENCING 3; RDR, RNA-dependent RNA polymerase; CLSY1, CLASSY 1; SHH1, SAWADEE HOMEODOMAIN HOMOLOG 1; Pol, RNA polymerase; pri-miRNA, primary microRNA; pre-miRNA, precursor microRNA; Sec-siRNA, secondary small interfering RNA; P, phosphate.