Supplementary Information for hnrnp Q mediates a phase-dependent translation-coupled mrna decay of mouse Period3. Do-Yeon Kim, Eunyee Kwak, Sung-Hoon Kim, Kyung-Ha Lee, Kyung-Chul Woo and Kyong-Tai Kim Supplementary Information contains Supplementary Methods Supplementary Figures: Figure S1-4 and their legends Supplementary Methods RNA affinity purification Streptavidin-biotin RNA-affinity purification of mper3 5 UTR-binding proteins was performed as described previously (1). In brief, whole extracts prepared from NIH3T3 fibroblasts were incubated with or without biotinylated mper3 5 UTR, and subjected to streptavidin resin adsorption. For the competition assay, 5-fold molar excess of competitor was added, prior to the mixing streptavidin resin. Resin-bound proteins were fractionated by SDS-PAGE, and analyzed by immunoblotting.
Supplementary References 1. Grosset, C., Chen, C.Y., Xu, N., Sonenberg, N., Jacquemin-Sablon, H. and Shyu, A.B. () A mechanism for translationally coupled mrna turnover: interaction between the poly(a) tail and a c-fos RNA coding determinant via a protein complex. Cell, 13, 29-.
Supplementary Figure. 1 Per3 TBP 11 11 mrna remaining (%) 9 7 5 ActD ActD 28 2 4 mrna re emaining (%) 9 7 5 3 ActD ActD 28 2 4 Supplementary Fig 1. The efficiency of Actinomycin D was not altered by the circadian phase. To confirm whether the transcriptional shut-off by Actinomycin D is affected by circadian phase, other time points were selected. For the decay kinetics of the rising phase, transcription was blocked after h of dexamethasone treatment, instead of 18h. For the decay kinetics of the declining phase, transcription was blocked after 28 h of dexamethasone treatment, instead of 3h.
Supplementary Figure. 2 Biotinylation Per3 1-357 + + Competitor + input Bead only hnrnp Q GAPDH Ponceau S Supplementary Fig 2. Confirmation of hnrnp Q as a mper3 5 UTR binding protein. Supplementary Fig 2. Confirmation of hnrnp Q as a mper3 5 UTR binding protein. To confirm whether hnrnp Q is associated with 5 UTR of mper3, mper3 5 UTR binding proteins were purified from NIH3T3 whole cell extracts, using biotin-labeled mper3 5 UTR mrna. After fractionation by SDS-PAGE, immunoblot analysis was performed with hnrnp Q and GAPDH antibody.
A 1 mper3 Supplementary Figure. 3 B 1 mtbp mrna remaining (% %) sicon+gfp sihnrnp Q+GFP sihnrnp Q+GFP-hnRNP Q 1 2.5 mr RNA remaining (%) sicon+gfp sihnrnp Q+GFP sihnrnp Q+GFP-hnRNP Q 1 2.5 C GFP hnrnp Q (endogenous) GAPDH Supplementary Fig 3. mrna decay kinetics of mper3 was rescued by exogenous hnrnp Q expression. (A) After transfection with either sicon or sihnrnp Q with GFP mock or GFP tagged hnrnp Q, the decay kinetics of endogenous mper3 was analyzed. Cells were treated with nm Dexamethasone, 12 h after transfection. 9hr post synchronization, 5 µg/ml actinomycin D was added. The endogenous mper3 mrna levels were determined using quantitative real-time RT- PCR and normalized to RPL32 mrna levels at the indicated time points. Initial levels of mper3 mrna in each cells were arbitrarily set as. (B) Decay kinetics of TBP mrna was analyzed for negative control. (C) Western blot confirmed endogenous hnrnp Q downregulation and exogenous hnrnp Q expression.
Supplementary Figure. 4 A Per3 uorf translation efficiency B 1 reporter mrna stability 2 1.5 1.5 mrna re emaining (%) Per3 1-357/NAT Per3 uaug-1 mut/nat Per3 uaug-2 mut/nat Per3 uaug-3 mut/nat Per3 uaug-4 mut/nat 15 1.5 35 3.5 Supplementary Fig 4. Upstream AUG mutation does not affect translation regulation and mrna stability. (A) Translation initiation controlled by wild-type or upstream AUG mutant forms of mper3 5 - UTR is analyzed..5µg of reporter plasmid was transiently transfected into NIH3T3 cell lines and translation efficiency of AANAT reporter was measured by the AANAT assay. For transfection control,.1µg of beta-galactosidase plasmid was cotransfected. The AANAT assay and beta-galactosidase assay were performed at 24h after transfection. Per3 uaug- x mut/nats are single nucleotide mutant constructs of Per3 1-357/NAT (xth uaug was mutated to AAG). (B) After co-transfection of.5µg of AANAT reporters,, the decay kinetics of the reporter mrna was analyzed. Cells were treated with 5 µg/ml actinomycin D, at 18 h after transfection. Each mrna levels was determined by quantitative real-time RT-PCR and normalized to RPL32 mrna levels.