Supporting Information Yang et al. 10.1073/pnas.1605733113 GFP Pol II FRI ELF6:GFP/elf6 Fig. S1. Pol II is not enriched by ELF6:GFP immunoprecipitation. Total protein was extracted from 14-d-old seedlings. GFP pull-down was performed by GFP-Trap. FRI was used as the control. 8WG16 was used to detect Pol II using Western blotting. Yang et al. www.pnas.org/cgi/content/short/1605733113 1 of 6
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Supporting InformationYang et al. 10.1073/pnas.1605733113
GFP
Pol II
FRIELF
6:GFP/el
f6
Fig. S1. Pol II is not enriched by ELF6:GFP immunoprecipitation. Total protein was extracted from 14-d-old seedlings. GFP pull-down was performed byGFP-Trap. FRI was used as the control. 8WG16 was used to detect Pol II using Western blotting.
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Fig. S2. SDG8 and ELF6 expression levels in different transgenic plants. (A) SDG8:GFP expression in SDG8:GFP/elf6 sdg8 in a root of a 9-d-old seedling. (B) SDG8expression levels in SDG8:GFP/sdg8 and SDG8:GFP/elf6 sdg8 transgenic plants. The value represents the ratio SDG8/UBC. Means ± SEM from three independentexperiments are shown. (C) ELF6:GFP expression in ELF6:GFP/elf6 sdg8 in a root of a 9-d-old seedling. (D) ELF6 expression levels in ELF6:GFP/elf6 and ELF6:GFP/elf6 sdg8 transgenic plants. The value represents the ratio of ELF6/UBC. Means ± SEM from three independent experiments are shown.
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Fig. S3. RNA fold changes and total Pol II levels at FLC. (A) Relative FLC RNA levels in FRI and the mutants. Spliced FLC (over exons 4–6), FLC exon 1, andunspliced FLC (unspliced introns 2 and 3) are shown. Levels are normalized to internal reference gene UBC, and then normalized to sdg8 (set as 1). (B) Total PolII levels at FLC in FRI and the mutants, as detected by 8WG16 antibody. (C) Pol II levels at actively transcribed gene ACTIN, silenced gene STM, and transposonelement AtSN1 were used as experimental controls for B. (D) Total RNA fold changes along FLC intron 1 in FRI and the mutants. Levels are normalized tointernal reference gene UBC, and then normalized to sdg8 (set as 1). In A–D, means ± SEM from three independent experiments are shown.
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Fig. S4. ELF6 and SDG8 expression levels in developing embryos and during vernalization. (A) ELF6 mRNA expression levels in developing embryos and duringvernalization. (B) SDG8 mRNA expression levels in developing embryos and during vernalization. The developing stages of siliques: immediately after fertil-ization, with petals still attached (SQ16); small and without petals (SQ17a); first (SQ17b1) and last (SQ17b2) mature green siliques; and yellow siliques (SQ18).The vernalization states are: nonvernalized plant materials (NV), plants after a certain period of cold exposure (e.g., 2WV T0, 2 wk of cold exposure), and plantsafter a 5-wk cold exposure followed by 7 d growth in the warm (5WV T7). The values represent the ratios FLC/UBC. Values are means ± SEM of three biologicalreplicates.
FLC
0
5
10
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NV
2WV T0
3WV T0
4WV T0
5WV T0
5WV T7
5WV T20
FRIjmj13
elf6
elf6 jmj13
FLC expression levels in vernalization
Fig. S5. H3K27me3 demethylase mutants display similar FLC expression dynamics during/after cold exposure as FRI. Values are means ± SEM of three bi-ological replicates.
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Fig. S6. The H3K27me3 and H3K36me3 dynamics during/after cold exposure in elf6. (A to F) ChIP analysis histone modification levels. H3K27me3 levels in3WV T0 (A), 3WV T4 (C), 3WV T10 (E). STM was used as the internal control. Data are presented as the ratio of H3K27me3 FLC/H3 FLC to H3K27me3 STM/H3STM. H3K36me3 levels in 3WV T0 (B), 3WV T4 (D), and 3WV T10 (F) are shown. ACTIN was used as the internal control. Data are presented as the ratio ofH3K36me3 FLC/H3 FLC to H3K36me3 ACTIN/H3 ACTIN. Means ± SEM from three independent biological replicates are presented. Asterisk indicates significantdifferences between FRI and elf6, as determined by Student’s t test (P < 0.05).
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Fig. S7. ref6 displays late flowering after vernalization. (A) FLC expression levels during a time course of vernalization. FLC expression levels were measured innonvernalized plant materials (NV), plants after a certain period of cold exposure (e.g., 2WV T0, 2 wk of cold exposure), and plants after a 5-wk cold exposurewith a certain period of postcold growth (e.g., 5WV T7, 7 d warm growth after 5-wk cold exposure). Values are means ± SEM of three biological replicates. Thevalues represent the ratio FLC/UBC. (B) Flowering time of the plants after a 4-wk cold exposure, after which the plants were grown in long-day conditions.(C) Flowering time measured by rosette leaf number produced by the primary shoot apical meristem when the first flower was opening. The plants weretreated with a 4-wk cold exposure, then grown in long-day conditions. Values are means ± SEM from eight plants.
WT
elf6
jmj13
elf6 j
mj13
ref6
elf6 r
ef6
jmj13
ref6
elf6 j
mj13 re
f6
H3K27me3
H3
Fig. S8. H3K27me3 levels in H3K27 demethylase mutants. H3 was used as loading control.
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