Supplemental Data. Perea-Resa et al. Plant Cell. (2012) /tpc

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1 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc Sm Sm2 Supplemental Figure. Sequence alignment of Arabidopsis LSM proteins. Alignment of the eleven Arabidopsis LSM proteins. Sm and Sm2 domains are shown. Black and gray shading indicates identical or similar residues, respectively, in at least half of the sequences. Sequence alignment was generated using CLUSTALW software (Thompson et al., 994) and edited with BioEdit software (Hall, 999).

2 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc Supplemental Figure 2. Phylogenetic analysis of plant LSM proteins. The amino acid sequences of LSM proteins from Arabidopsis thaliana (At), Glycine max (Gm), Populus trichocarpa (Pt), Oryza sativa (Os), Zea mays (Zm) and Homo sapiens (Hs) were aligned with MAFFT software version 6 (Katoh and Toh, 28) and manually adjusted (the alignment is provided in Supplemental Data set online). The evolutionary history was inferred by using the Maximum Likelihood method based on the JTT matrix-based model, and represented with the bootstrap consensus tree. Boostrap support, from replicates, is shown on branches as a percentage. Branches reproduced in less than 5% bootstrap replicates are collapsed. The tree is drawn to scale, and the scale bar shows the number of substitutions per branch length. Evolutionary analyses were conducted with MEGA5 (Tamura et al., 2). A, B, C and D suffixes indicate different isoforms of a given LSM protein. Plant protein sequences were retrieved from Phytozome ( Goodstein et al., 22) using Arabidopsis LSM sequences to perform BLAST. The accession numbers for the represented proteins are described in Supplemental Data set 2E online. 2

3 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc A B Supplemental Figure 3. Expression patterns of LSMA and LSMB genes. GUS activity in whole Arabidopsis plants containing the fusion LSMA PRO -GUS (A) or LSMB PRO -GUS (B). Bars = mm. 3

4 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc LSMB/LSM2 LSMB/LSM4 LSMB/LSM8 LSM2/LSM3B LSM3B/LSM6A LSM6B/LSM5 LSM4/LSM6B LSM6B/LSM7 LSM3B/LSM5 Supplemental Figure 4. Visualization of in vivo interactions between Arabidopsis LSM proteins by BiFC assays. The corresponding LSM-nGFP/LSM-cGFP proteins were pairwise tested by Agrobacterium-mediated transformation in Nicotiana benthamiana leaves. Interactions between LSMB/LSM2, LSMB/LSM4, LSMB/LSM8, LSM2/LSM3B, LSM3B/LSM6A, LSM6B/LSM5, LSM4/LSM6B, LSM6B/LSM7 and LSM3B/LSM5 are presented. Bars = 2 µm. 4

5 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc A No- lsma Col- lsmb B No- lsma Col- lsmb Supplemental Figure 5. Phenotypical analysis of lsma and lsmb single mutants. (A) and (B) Morphological phenotypes of No-, lsma, Col- and lsmb plants. Five-day-old seedlings (A) and 6-week-old plants (B). 5

6 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc Germination (%) 2 ) Rosettearea(cm Root lenght (cm) Total leaf number A. Germination B. Abnormal seedlings C. Cotyledonary veins c-lsma D. Rosette size E. Petiole lenght Seedlings (%) cotyledons abnormal cotyledons F. Leaf area G. Root lenght H. Secondary roots I. Flowering time (LD) J. Flowering time (SD) K. Silique lenght L. Seed number c-lsma c-lsma c-lsma c-lsma Petiole lenght (cm) Secondary roots number Silique lenght (cm) c-lsma 8 6 ** ** * c-lsma c-lsma Supplemental Figure 6. Quantification of developmental phenotypes shown by lsm mutants. (A) to (L) Quantitative data on the developmental phenotypes exhibited by wild-type (),, c-lsma,,, and c- lsm8 plants. Percentage of germination 5 days after stratification. At least 3 seeds of each genotype were analyzed (A). Percentage of seedlings with abnormal shape or number of cotyledons. A minimum of 5 seedlings of each genotype were scored (B). Percentage of cotyledons showing closed areoles. Data were collected from at least 5 seedlings of each genotype (C). Area of rosettes from 4-week-old plants. A minimum of 25 plants of each genotype were measured (D). Petiole lengths of the st and 2nd leaves from -day-old plants. At least 25 petioles of each genotype were measured (E). Area of the 3rd and 4th leaves from 5-day-old plants. A minimum of 2 leaves of each genotype were measured (F). Length of the main root (G) and number of secondary roots (H) in -day-old plants. At least 6 plants of each genotype were analyzed. Flowering time in long-day (LD) (I) and short-day (SD) (J) photoperiods scored as total leaf numbers. A total of 24 plants of each genotype were scored. Length of the 6th and 7th siliques of the main stem. A minimum of 25 siliques of each genotype were measured (K). Number of seeds from the 6th and 7th siliques of the main stem. Seeds from at least 2 siliques of each genotype were counted (L). In all cases, data represent mean ± SD. Asterisks indicate significantly different data from according to a t-test (*P<.5, **P<., P<.). ** Cotyledons (%) 2 areoles 3 areoles 4 areoles 2 ) Total leaf number Leaf area (cm Seed number/silique ** c-lsma ** ** c-lsma c-lsma c-lsma 6

7 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc A B C D lsma lsmb E Supplemental Figure 7. Complementation of the double mutant by LSMB. (A) to (E) Morphological phenotypes of wild-type (), and plants. Five-day-old seedlings (A), rosette leaves (B), siliques (C), seeds (D), and 6-week-old plants (E). 7

8 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc A EXPL ATHSPRO2 B C D Relative expression,8,6,4,2 EIF4A rrna Relative expression Relative expression EXPL EIF4A rrna EXPL,8,6,4, ,8,6,4, No EXPL No-,8,6,4, min lsma ATHSPRO2,8,6,4, ,8,6 EIF4A,4, /4 5/8 9/ min 47/42 8/2 lsma,8,6,4,2 EIF4A E F Relative expression G H Relative expression I EXPL EIF4A,8,6,4,2 rrna EXPL EIF4A,8,6,4,2 rrna EXPL ATHSPRO2 EIF4A Col EXPL Col EXPL No- Col-,8 Col-,8,6,4, lsma Col- lsmb min lsmb 39/35 9/ min lsmb,8,6,4,2,6,4, ,8,6,4,2 EIF4A 49/46 6/5 EIF4A Supplemental Figure 8. mrna stability and accumulation of capped transcripts in, lsma, lsmb and plants. (A) to (H) Transcript accumulation in, lsma, lsmb and plants. Levels of several transcripts in 6- day-old Arabidopsis seedlings of and (A-B), No- and lsma (C-D), Col- and lsmb (E-F), and Col and (G-H) at different minutes (min) after cordycepin treatment. (A, C, E and G) RNA hybridization using specific probes. rrna levels were used as a loading control. The estimated half-life (min) of mrnas is shown to the right of each panel (/analyzed genotype). (B, D, F and H) Graphical representation of normalized data from gel quantification of all analyzed genes in and (B), No- and lsma (D), Col- and lsmb (F) or Col- and (H) seedlings. (I) Accumulation of capped transcripts corresponding to different genes in 6-day-old No-, lsma, Col-, lsmb and Arabidopsis seedlings by RACE-PCR. RACEPCR products were obtained using a high number of cycles in all cases. EIF4A RACE-PCR product is shown as a loading control. 8

9 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc Supplemental Figure 9. Tiling array hybridization signals in representative genes showing intron retention events in the mutant. Vertical bars represent the signal intensity values obtained by comparing the signals for all the array probes along the selected genes between the mutant and. The structure of each gene (TAIR 7) is also represented: black boxes, narrow lines and border boxes symbolize exons, introns and untranslated regions, respectively. Orange boxes indicate intron retention events. Genome graphs displaying probe intensity data all over the gene structure were generated with the Integrated Genome Browser (Nicol et al., 29). 9

10 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc U6 snrna h U3 snorna U4 snrna rrna Supplemental Figure. Stability of U6 snrna in the double mutant. Levels of U6 snrna, U3 snorna and U4 snrna in 6- day-old wild-type () and Arabidopsis seedlings at different hours (h) after cordycepin treatment, as shown by RNA hybridization using specific probes. rrna levels were used as a loading control.

11 Supplemental Data. Perea-Resa et al. Plant Cell. (22)..5/tpc Supplemental References Goodstein, D.M., Shu, S., Howson, R., Neupane, R., Hayes, R.D., Fazo, J., Mitros, T., Dirks, W., Hellsten, U., Putnam, N., and Rokhsar, D.S. (22). Phytozome: a comparative platform for green plant genomics. Nucleic Acids Res. 4, Hall, T.A. (999). BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT Nucl. Acids Symp. Ser. 4, Katoh, K. and Toh, H. (28) Recent developments in the MAFFT multiple sequence alignment program. Brief. Bioinform. 9, Nicol J.W., Helt G.A., Blanchard S.G. Jr., Raja A. and Loraine A.E. (29). The Integrated Genome Browser: free software for distribution and exploration of genomescale datasets. Bioinformatics. 25, Tamura K., Peterson D., Peterson N., Stecher G., Nei M., and Kumar S. (2). MEGA5: Molecular Evolutionary Genetics Analysis using Maximum Likelihood, Evolutionary Distance, and Maximum Parsimony Methods. Molecular Biology and Evolution 28, Thompson, J.D., Higgins, D.G., and Gibson, T.J. (994). CLUSTAL W: improving the sensitivity of progressive multiple sequence alignment through sequence weighting, position-specific gap penalties and weight matrix choice. Nucleic Acids Res. 22,

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