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. 2018 Sep 12;9:1333. doi: 10.3389/fpls.2018.01333

FIGURE 6.

FIGURE 6

SKI7 alternative splicing has distinct functional consequences in different plant linages. (A) LOC9652039 in S. moellendorffi is alternatively spliced to either encode a complete SKI7 protein (variant 1), a putative HBS1 protein lacking the Patch 4-like motif (variant 3), the SKI7-like motif (variant 4), or both (variant 5). (B) Os04g58140 is the only SKI7-encoding locus in rice. Os04g58140 is alternatively spliced to retain intron 4, which includes several premature stop codons. Thus, this alternative splice form (bottom) does not encode a functional HBS1 or SKI7 protein, and is likely subject to NMD. As a result, unlike most other plant lineages examined, no single gene in rice can putatively encode both HBS1 and SKI7.