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1 Electronic Supplementary Material (ESI) for Integrative Biology. This journal is The Royal Society of Chemistry 217 Supplementary Materials for Chemical genomic analysis of GPR35 signaling Heidi (Haibei) Hu a,, Huayun Deng a, Shizhang Ling a,, Haiyan Sun a,, Terry Kenakin b, Xinmiao Liang c, Ye Fang a,* a Biochemical Technologies, Science and Technology Division, Corning Incorporated, Corning, NY 14831, USA b Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC 27599, USA c Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China Current address: Medical Laboratory Science, Jefferson College of Health Science, Roanoke, VA 2413, USA Current address: Department of Medicine, Johns Hopkins University, Baltimore, MD, USA Current address: Laboratory for Inflammation and Cancer, Biodesign Institute, Arizona State University, Tempe, Arizona * Correspondence to: fangy2@corning.com 1

2 This PDF file includes: Fig. S1. Intra-plate data normalization for shrna hit identification. Fig. S2. Characterization of GPR35 signaling pathway in HT-29 cells. Fig. S3. Pathway deconvolution of the DMR of zaprinast. Fig. S4. Impact of different compounds on the EGFR tyrosine kinase activity. Fig. S5. Effects of GPR35 agonist-treatment on HIF-1α protein levels in serum starved HT-29 cells under normoxic condition. Fig. S6. Kinase network for resulting in resensitization of cells. Table S1. Excel data summarizing DNA microarray data and genes that gave rise to intensity greater RFU under at least one treatment condition and displayed at least two fold changes in expression level. Table S2. The gene names, shrna clones, and robust z-scores for the kinase hits identified for the early (1 min post stimulation) and late (5 min) events of the YE21 DMR. Table S3. The gene names, shrna clones, and robust z-scores for a small set of kinase hits identified, where at least two shrnas for the specific kinase altered the YE21 DMR by 2 MAD (median absolute deviation), but with opposite directions. 2

3 a b - RNAi d RNAi Robust Z-score (late DMR) Robust Z-score (early DMR) - RNAi c RNAi Fig. S1. Intra-plate data normalization for shrna hit identification. (a,b) The DMR amplitude, as indicated by response in picometer,, at 1 min (a) or 5 min (b) post stimulation with YE21 as a function of shrna treatment. (c,d) The robust zscore, a z-score not adversely affected by outliers, was calculated using [(experimental data median) / median absolute deviation (MAD)] and plotted as a function of each shrna treatment, based on the DMR amplitude at 1 min (c) or 5 min (d) post stimulation with YE21. Here, an intra-plate normalization approach was applied (see Methods). 3

4 a 4 3 camp (nm) 2 1 b -1 4 Control Forskolin YE21 Zaprinast Pamoic acid 3 camp (nm) 2 1 c Fold increase (Fluo Control FSK YE21 + FSK ZAP + FSK PA + FSK Carbachol 1. DMSO YE21.5 Zaprinast. Pamoic acid 5 15 Time (sec) Fig.S2 Characterization of GPR35 signaling pathway in HT-29 cells. (a) camp concentration as a function of compounds, each at 2 M. Cells were stimulated with each compound at 2 µm for 3 min. (b) camp concentration as a function of compounds. Cells were stimulated for 3 min with.5 M forskolin (FSK) in the absence or presence of a GPR35 agonist, each at 2 µm. (c) Fluo-4 Direct calcium assay signals, real-time fluorescence emission ratios, of three GPR35 agonists as well as carbachol, each at 1 M. Carbachol is an agonist for the endogenous G q -coupled muscarinic M3 receptor in HT29, and used as the positive control. The data represent mean standard deviation of 4 replicates for (a to c). These results suggest that three agonists tested, pamoic acid (PA), YE21, and zaprinast (ZAP), all were inactive in increasing camp (a), decreasing the forskolin-elevated camp (b), or causing Ca 2+ mobilization (c). 4

5 a b c d 5 Control PTx Control Forskolin e f g h Control NSC Control CTx Control Y Mock - ROCK2 RNAi Control Gq inhibitor Control U Fig. S3 Pathway deconvolution of the DMR of zaprinast. (a-h) The DMR of zaprinast in HT29 cells without (Control) or with pretreatment by ng/ml pertussis toxin (PTx) (a); ng/ml cholera toxin (CTx) (b); 1 µm forskolin (c); 1 µm FR9359 (G q inhibitor) (d); 25µM NSC23766 (e); 1 µm Y27632 (f); one ROCK2 sirna (g); 1 µm U126 (h). In (a-h), data represents mean + standard deviation, N=4 (2 independent measurements, each in duplicate). The standard deviation is shown in gray. 5

6 Ratio of RFU at 52nm/495nm Negative control Positive control 1 um staurosporine 1uM gefitinib Compound YE21 Pamoic acid Zaprinast Fig. S4. Effects of different compounds on EGFR tyrosine kinase activity. All compounds were assayed at 25 µm, except for the two control compounds (staurosporine and Iressa) whose concentrations were indicated in the graph. Negative control: no EGFR kinase. Positive control: 5ng/ml EGFR plus.1µm the substrate as recommended by the supplier. Data are representative of three independent experiments. 6

7 HIF-1α β-actin Fig. S5. Effects of GPR35 agonist-treatment on HIF-1α protein levels in serum starved HT- 29 cells under normoxic condition. The concentrations of compounds were: 1 µm pamoic acid (PA), 1 µm zaprinast, 1 µm YE21, 1 µm ML145, 1 µm bortezomib (BO), or 1 µm deferoxamine mesylate (DFX). Both BO and DFX were used as the positive controls. Whole cell lysates were prepared at 5 hours post-treatment and HIF-1α protein levels were determined by immunoblotting. Sample integrity was confirmed by immunoblotting for the β-actin as a control. Data are representative of three independent experiments. 7

8 a b c Zaprinast CSNK2A1 PDGFRB PRKAA2 TSSK2 Buffer Zaprinast PSKH1 GRK1 MELK NEK6 Buffer Zaprinast MAP2K5 PDPK1 PIM2 WEE1 EIF2AK3 Buffer d e f Buffer TSSK2 PDGFRB CSNK2A1 PRKAA2 YE Buffer PSKH1 GRK1 MELK NEK6 YE Buffer MAP2K5 PDPK1 PIM2 WEE1 EIF2AK3 YE21 g Fig. S6. Kinase network for resulting in resensitization of cells. Here, the cells were treated with specific shrnas, followed by stimulation with 1 µm YE21 for 1 hour, and then 1 µm zaprinast for another hour. Hits were selected based on that after shrnai knockdown, cells gave rise to a DMR of YE21 comparable to the mock treated cells, but still responded to the subsequent stimulation with zaprinast. The network was generated using STRING 1. Connecting lines are color coded by the type of evidence used to build the network (details can be found in Unconnected hits were also listed. GO enrichment analysis suggests that cytoskeleton organization (GO term 71), and response to stress (GO term 695) played important roles in the resensitization. Among these kinases, seven of them (MAP2K5, MELK, EIF2AK3, NEK6, MAPKAPK3, TLK2, WEE1) are known to involve in cell response to stress. Furthermore, five kinases, including TSSK2, PSKH1, MAP2K5, TLK2, and NEK6, are known to associate with cytoskeleton, while three (TSSK2, PSKH1, NEK6) are linked to microtubule organizing center, three (TSSK2, PDPK1 and PDGFRB) are linked to cytoplasmic membrane-bounded vesicle. Although these results have not been validated yet, these findings suggest a possibility that these kinases, at least in part, are involved the cellular mechanisms for GPR35 desensitization and resensitization process. 8

9 Table S2. The gene names, shrna clones, and robust z-scores for the kinase hits identified for the early (1 min post stimulation) and late (5 min) events of the YE21 DMR. These hits were identified when at least two shrna clones for a single kinase within the library altered the YE21 DMR by 2 MAD (median absolute deviation); that is, a robust z- score of 2 or -2. Results showed that there were 99 kinases in total, among which 42 were specific to the early DMR, 26 specific to the late DMR, and 32 common to both events. For the early DMR, there were 46 kinases whose knockdown decreased the DMR, and 27 kinases whose knockdown potentiated the DMR. On the other hand, for the late DMR, there were 35 kinases whose knockdown decreased the DMR, and 23 whose knockdown potentiated the DMR. Gene name shrna clone Early DMR Robust z-score Late DMR robust z-score AAK1 AAK1 NM_14911.x-969s1c1 NM_ s1c ABL1 ABL1 ABL1 NM_5157.x-3369s1c1 NM_ s1c1 NM_ s1c ACVR1B ACVR1B NM_2328.x-783s1c1 NM_2328.x-48s1c AKT1 AKT1 NM_ s1c1 NM_5163.x-144s1c AKT3 AKT3 NM_ s1c1 NM_ s1c ALPK1 ALPK1 ALPK1 NM_ ,NM_ NM_ ,NM_ NM_ ,NM_ ATM ATM NM_ s1c1 NM_ s1c AURKB AURKB NM_4217.x-883s1c1 NM_4217.x-468s1c BCKDK BCKDK NM_5881.x-681s1c1 NM_5881.x-85s1c BLK BLK NM_ s1c1 NM_1715.x-261s1c1 BMPR1A BMPR1A NM_4329.x-88s1c1 NM_ s1c1-1.6 BMPR2 BMPR2 NM_124.x-1962s1c1 NM_124.x-488s1c BRD2 BRD2 BRD2 NM_ s1c1 NM_ s1c1 NM_ s1c BRDT NM_ s1c

10 1 BRDT BRDT NM_ s1c1 NM_ s1c BUB1B BUB1B NM_1211.x-3346s1c1 NM_1211.x-521s1c1-1. CAMK2A CAMK2A CAMK2A NM_ x-394s1c1 NM_ x-1181s1c1 NM_ x-1116s1c CAMK2B CAMK2B NM_122.x-2338s1c1 NM_122.x-1815s1c CAMK2G CAMK2G NM_1222.x-2251s1c1 NM_1222.x-279s1c CAMKK1 CAMKK1 NM_17227.x-1434s1c1 NM_17227.x-578s1c1 CAMKV CAMKV NM_2446.x-91s1c1 NM_2446.x-346s1c CDC2L1 CDC2L1 CDC2L1 CDC2L1 CDC2L1 NM_ s1c1 NM_ s1c1 NM_ s1c1 NM_ s1c1 NM_ s1c CDC2L6 CDC2L6 NM_1576.x-1837s1c1 NM_1576.x-639s1c CDK3 CDK3 NM_1258.x-197s1c1 NM_1258.x-618s1c CDK4 CDK4 NM_75.x-258s1c1 NM_ s1c CDK5 CDK5 CDK5 NM_ s1c1 NM_ s1c1 NM_ s1c CDK6 CDK6 NM_ s1c1 NM_ s1c CDK9 CDK9 NM_ s1c1 NM_ s1c CDKL1 CDKL1 NM_ s1c1 NM_ s1c CHEK1 CHEK1 NM_1274.x-58s1c1 NM_ s1c1 -. CLK1 CLK1 CLK1 NM_471.x-1435s1c1 NM_471.x-1746s1c1 NM_471.x-762s1c CLK4 CLK4 NM_2666.x-1413s1c1 NM_2666.x-661s1c CSNK1G1 CSNK1G2 NM_2248.x-1348s1c1 NM_ s1c DDR1 DDR1 NM_1954.x-1857s1c1 NM_1954.x-1358s1c

11 11 DYRK3 DYRK3 NM_3582.x-658s1c1 NM_ s1c DYRK4 DYRK4 NM_3845.x-1755s1c1 NM_ s1c EIF2AK2 EIF2AK2 NM_2759.x-474s1c1 NM_2759.x-149s1c EPHA3 EPHA3 EPHA3 EPHA3 NM_ s1c1 NM_ s1c1 NM_ s1c1 NM_ s1c EPHA5 EPHA5 NM_ s1c1 NM_ s1c EPHA7 EPHA7 NM_ s1c1 NM_ s1c ERBB3 ERBB3 NM_ s1c1 NM_ s1c FER FER NM_5246.x-1193s1c1 NM_5246.x-883s1c1.7.5 FES FES NM_5.x-1641s1c1 NM_5.x-1875s1c FGFR1 FGFR1 NM_64.x-2463s1c1 NM_ s1c GAK GAK NM_ s1c1 NM_5255.x-4s1c GRK7 GRK7 NM_13929.x-1781s1c1 NM_13929.x-1725s1c IGF1R IGF1R NM_ s1c1 NM_ s1c IRAK1 IRAK1 IRAK1 NM_1569.x-2188s1c1 NM_1569.x-149s1c1 NM_ s1c ITK ITK NM_ s1c1 NM_5546.x-614s1c JAK1 JAK1 JAK1 JAK1 NM_2227.x-849s1c1 NM_ s1c1 NM_ s1c1 NM_ s1c LIMK1 LIMK1 NM_2314.x-314s1c1 NM_ s1c MAP2K3 MAP2K3 NM_2756.x-136s1c1 NM_2756.x-826s1c1.7.8 MAP3K6 MAP3K6 MAP3K6 NM_4672.x-139s1c1 NM_4672.x-1283s1c1 NM_4672.x-832s1c MAP3K9 MAP3K9 NM_ s1c1 NM_ s1c

12 12 MAPK14 MAPK14 NM_1315.x-371s1c1 NM_13912.x-877s1c MARK4 MARK4 MARK4 MARK4 NM_ s1c1 NM_ s1c1 NM_ s1c1 NM_ s1c MELK MELK NM_ s1c1 NM_ s1c MET MET MET NM_ s1c1 NM_ s1c1 NM_ s1c MINK1 MINK1 NM_ s1c1 NM_ s1c1.5.6 MKNK1 MKNK1 NM_ s1c1 NM_ s1c MLKL MLKL MLKL NM_ s1c1 NM_ x-1935s1c1 NM_ s1c MST1R MST1R NM_2447.x-69s1c1 NM_ s1c NTRK2 NTRK2 NM_618.x-2123s1c1 NM_ s1c PAK4 PAK4 PAK4 PAK4 PAK4 NM_5884.x-193s1c1 NM_5884.x-285s1c1 NM_5884.x-154s1c1 NM_5884.x-463s1c1 NM_5884.x-1335s1c PDK2 PDK2 PDK2 NM_2611.x-834s1c1 NM_2611.x-158s1c1 NM_2611.x-83s1c PFTK1 PFTK1 PFTK1 NM_12395.x-416s1c1 NM_12395.x-1166s1c1 NM_12395.x-456s1c PHKG1 PHKG1 NM_ s1c1 NM_ s1c PIM1 PIM1 NM_ s1c1 NM_ s1c1 1.4 PLK4 PLK4 PLK4 PLK4 NM_14264.x-433s1c1 NM_ s1c1 NM_ s1c1 NM_ s1c PRKACB PRKACB PRKACB NM_ s1c1 NM_ s1c1 NM_2731.x-722s1c PRKCE PRKCE NM_5.x-591s1c1 NM_5.x-1288s1c

13 13 PRKCH PRKCH NM_ s1c1 NM_ s1c PRKDC PRKDC NM_ s1c1 NM_ s1c PTK2 PTK2 PTK2 PTK2 NM_ s1c1 NM_ s1c1 NM_567.x-2659s1c1 NM_ s1c RET RET RET NM_ s1c1 NM_ s1c1 NM_ s1c RIOK2 RIOK2 NM_ s1c1 NM_ s1c RIPK1 RIPK1 RIPK1 NM_384.x-147s1c1 NM_ s1c1 NM_ s1c ROCK2 ROCK2 ROCK2 NM_ s1c1 NM_ s1c1 NM_ s1c ROR2 ROR2 ROR2 ROR2 NM_456.x-3357s1c1 NM_ s1c1 NM_ s1c1 NM_456.x-1564s1c ROS1 ROS1 NM_2944.x-3659s1c1 NM_2944.x-294s1c RPS6KA5 RPS6KA5 NM_4755.x-677s1c1 NM_4755.x-336s1c1 -.1 RPS6KB1 RPS6KB1 NM_3161.x-151s1c1 NM_3161.x-1561s1c RYK RYK NM_2958.x-377s1c1 NM_2958.x-1526s1c SIK3 SIK3 NM_ s1c1 NM_ s1c STK11 STK11 NM_455.x-55s1c1 NM_455.x-548s1c STK24 STK24 STK24 NM_ s1c1 NM_ s1c1 NM_3576.x-66s1c STK32B STK32B NM_ s1c1 NM_ s1c STK4 STK4 NM_ s1c1 NM_ s1c STRADA STRADA NM_ s1c1 NM_ s1c STRADB STRADB NM_ s1c1 NM_ s1c

14 14 TGFBR1 TGFBR1 NM_ s1c1 NM_ s1c TNIK TNIK XM_ s1c1 XM_ s1c TSSK6 TSSK6 NM_ s1c1 NM_ s1c1.8.2 TWF2 TWF2 NM_ s1c1 NM_ s1c TXK TXK NM_ s1c1 NM_ s1c1-1.6 TYK2 TYK2 TYK2 NM_3331.x-329s1c1 NM_3331.x-533s1c1 NM_3331.x-478s1c ULK2 ULK2 NM_ s1c1 NM_ s1c UNK UNK UNK UNK XM_ s1c1 NM_16151.x-1186s1c1 NM_ s1c1 NM_ s1c YES1 YES1 YES1 NM_ s1c1 NM_ s1c1 NM_ s1c ZAP7 ZAP7 NM_179.x-182s1c1 NM_179.x-2393s1c

15 Table S3. The gene names, shrna clones, and robust z-scores for a small set of kinase hits identified, where at least two shrnas for the specific kinase altered the YE21 DMR by 2 MAD (median absolute deviation), but with opposite directions. There were 15 kinases in total. These kinases were excluded from the follow-up analysis. Gene name shrna clone Early DMR Robust z score ALPK2 NM_ s1c1 NM_ s1c1 2.9 AXL NM_21913.x-1881s1c1 NM_1699.x-1854s1c1 CDC2L2 NM_ s1c1-1. NM_ s1c1.6 CDC2L5 NM_3718.x-516s1c1-6.4 NM_3718.x-34s1c1 CDC42BPA NM_14826.x-1153s1c1-3.4 NM_635.x-537s1c1 CDK1 NM_ s1c1-8.5 NM_52987.x-186s1c1 3. CDKL3 NM_1658.x-1442s1c1-4.4 NM_1658.x-25s1c1 1.4 CSNK1E NM_ s1c1-3.8 NM_ x-895s1c1 1.5 EPHA1 NM_ s1c1-3.2 NM_ s1c1 FGFR3 NM_142.x-1972s1c1-5.5 NM_142.x-3699s1c1 3.8 MYLK4 XM_ s1c1-2. XM_ s1c1 PKN1 NM_2741.x-525s1c1-3.2 NM_2741.x-264s1c1 2. PTK6 NM_ s1c1 - NM_ s1c1 2.6 RPS6KB2 NM_ s1c1-4.8 NM_3952.x-44s1c1 2.6 TTK NM_ s1c1 - NM_ s1c1 Late DMR robust z score

16 Table S1 Excel data summarizing DNA microarray data and genes that gave rise to intensity greater RFU under at least one treatment condition and displayed at least two fold changes in expression level. 16

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