Supplementary Materials and Methods Plasmids. The table below contains information about all the plasmids utilized in our studies. Plasmid Previously described Gal4-RelA Yes (Schmitz and Baeuerle 1991) His-HA-Ub Yes, gift from Richard Baer His-RelA No HA-RelA No His-K63 only Ubiquitin Yes, gift from Richard Baer His-K63R only Ubiquitin Yes, gift from Richard Baer Cloning strategy Fig 1 His tag was fused to the C-terminus of RelA using the pEF vector (Schmitz lab) RelA with C-terminally located HA-tag was introduced in pcDNA3 (Schmitz lab) Mutagenesis of K28,37, 56, 62, 79, 83, 122, 123, 195, 218, 221 to R (Schmitz lab) Mutagenesis of K 301, 303, 310, 314, 315, 343, 427 to R (Schmitz lab) Mutagenesis of K28,37, 56, 62, 79, 83, 122, 123, 195, 218, 221, 301, 303, 310, 314, 315, 343, 427 to R (Schmitz lab) HA-RelA K/R RHD HA-RelA K/R TAD HA-RelA K/R All Fig 2 pEBB pEBB-HA-RelA Yes (Mizushima and Nagata 1990) Yes (Burstein et al 2005) pcDNA-Flag-p300 pEBB-HA-RelA K4RNonAc Yes, gift from Colin Duckett pEBB-HA-RelA K4R No pEBB-HA-RelA K5R No pEBB-HA-RelA K310R No pEBB-HA-RelA K8R No His-RelA K5R No pEBB-RelA-TB pEBB-RGS-His6-human ubiquitin pEBG Yes (Maine et al 2010) pEBG-RelA Yes (Burstein et al 2005) pCW7-His6-Myc-Ub Yes (Yu and Kopito 1999) No Mutagenesis of K56,62,79,195 to R (Burstein lab) Mutagenesis of K122,123,314,315 to R (Burstein lab) Mutagenesis of K122,123,310,314,315 to R (Burstein lab) Mutagenesis of K310 to R (Burstein lab) Fig 3 Fig 4 Yes (Maine et al 2010) Yes (Sanchez et al 1994) Mutagenesis of K56,62,79,122,123,195,310,314,315 to R (Burstein lab) RelA K5R was cut out of the pEBB-HA vector and ligated into the pEF-His vector (Schmitz lab) pEBB-Flag-COMMD1 Yes (Burstein et al 2004) pEBB-Flag-Cul2 Yes (Maine et al 2007) pEBB-Flag GCN5 E575Q Yes (Mao et al 2009) YFP-CBP Yes (Tini et al 2002) FG9 Yes (Wright and Duckett 2009) FG9-HA-mRelA WT No FG9-HA-mRelA K310R No FG9-HA-mRelA K4R No FG9-HA-mRelA K5R No FG9-HA-mRelA K310Q No FG9-HA-mRelA K4Q No FG9-HA-mRelA K5Q No Fig 5 PCR from Image clone 3489295 (Burstein lab) Mutagenesis of K310 to R (Burstein lab) Mutagenesis of K122,123,314,315 to R (Burstein lab) Mutagenesis of K122,123,310,314,315 to R (Burstein lab) Mutagenesis of K310 to Q (Burstein lab) Mutagenesis of K122,123,314,315 to Q (Burstein lab) Mutagenesis of K122,123,310,314,315 to Q (Burstein lab) Antibodies. The following antibodies were utilized for immunoblotting in our studies. Antibody Supplier Cat. No. Ubiquitin (P4D1) Cell Signaling 3936 RelA (C-Term, C-20) Santa Cruz Biotechnology sc-372 RelA (N-Term, F-6) Santa Cruz Biotechnology sc-8008 Tubulin Sigma T4026 K63-only Ubiquitin Biomol PW0600 Acetylated lysine Cell Signaling 9441 FLAG Sigma A8592 HA CoVance MMS101R Ubiquitin (P4D1) Cell Signaling 3936 HA Covance MMS101R RelA (C-Term, C-20) Santa Cruz Biotechnology sc-372 K63-only Ubiquitin Biomol PW0600 Tubulin Sigma T4026 Streptavidin-HRP BioLegend 405210 Acetylated lysine Cell Signaling 9441 FLAG Sigma A8592 GST Santa Cruz Biotechnology sc-459 HA Covance MMS101R Ubiquitin (P4D1) Cell Signaling 3936 GFP Roche 11814460001.00 HA Covance MMS101R RelA Santa Cruz Biotechnology sc-8008 IB- Upstate Biotechnologies 06-494 IB- Santa Cruz Biotechnology sc-9130 IB- Santa Cruz Biotechnology sc-7155 p50 Santa Cruz Biotechnology sc-8414 p52 Santa Cruz Biotechnology sc-848 RelB Santa Cruz Biotechnology sc-226 c-Rel Santa Cruz Biotechnology sc-6955 -Actin Sigma A5441 RelA(C-Term, C-20) Santa Cruz Biotechnology sc-372 Fig 1 Fig 2 Fig 3 Fig 4 Fig 5 Fig S1 Tubulin Sigma T4026 HDAC1 (H11) Santa Cruz G1008 Primers. The following table provides information regarding the qRT-PCR and ChIP primers utilized in our studies. qRT-PCR Gene target (mouse) Nfkbia Sense primer Antisense primer Reference CGCAGACCTGCACACCCCAG GGAGGGCTGTCCGGCCATTG This study Vcam1 AGTTGGGGATTCGGTTGTTCT CCCCTCATTCCTTACCACCC (Moreno et al 2010) Icam1 GGAGACGCAGAGGACCTTAAC CGCTCAGAAGAACCACCTTC (Geng et al 2009) Mmp13 ACCTCCACAGTTGACAGGCT AGGCACTCCACATCTTGGTTT (Moreno et al 2010) Saa3 CTGTTCAGAAGTTCACGGGAC AGCAGGTCGGAAGTGGTT (Moreno et al 2010) Il6 TGGATGCTACCAAACTGGAT GGACTCTGGCTTTGTCTTTC Lamb3 GGCTGCCTCGAAATTACAACA ACCCTCCATGTCTTGCCAAAG Cxcl10 AGTGAACTGCGCTGTCAATG CTTCAGGGTCAAGGCAAACT (Moreno et al 2010) (Spandidos et al 2010) Primerbank ID: 6678660a1 (Moreno et al 2010) Mmp3 ACCTATTCCTGGTTGCTG GCCTTGGCTGAGTGGTAG (Moreno et al 2010) Mmp9 CGAACTTCGACACTGACAAGAAGT GCACGCTGGAATGATCTAAGC (Wells et al 2003) Expi GGAGATGGATCGTGCTCTGG GGCTAGCCATCAGTCCTGC (Korsten et al 2009) Ccl9 CCAGTGGTGGGTGTACCAG CTCCGATCACTGGGGTTG (van Erp et al 2006) ChIP Gene promoter (species) Vcam1 (mouse) Sense primer Antisense primer Reference TCAGCCCAGAAAGCAGC AAAGTGTTCAGCCTCCA (Moreno et al 2010) Icam1 (mouse) AGGGGACTAGGCAGTAGTCAATCAG GAACGAGGGCTTCGGTATTT (Geng et al 2009) ICAM1 (human) CCCGATTGCTTTAGCTTGGAA CCGGAACAAATGCTGCAGTTAT (Horion et al 2007) Mmp13 (mouse) GCAGACATTTTCCTTA ATGTTTGTGACTTGGA (Moreno et al 2010) Microarray analysis RNA extraction and quality control. RNA was extracted using the Trizol method according to the manufacturer’s instructions (Invitrogen; Carlsbad, California, USA). RNA integrity was validated using an Agilent Bioanalyzer. All RNA preparations had RIN values above 8.8 except for samples from rela-/- fibroblasts reconstituted with vector control and treated for 8h with TNF. The latter showed substantial degradation of total RNA as expected from TNF-dependent apoptosis in the absence of protection by NF-B/RelA dependent gene expression. However, these samples could also be subjected to the microarray analysis protocol. Microarray-based mRNA expression analysis (Single Color Mode). The “Whole Mouse Genome Oligo Microarray V2” (G4846A, ID 026655, Agilent Technologies; Santa Clara, California, USA) used in this study contains 44397 oligonucleotide probes covering the entire murine transcriptome. Synthesis of Cy3-labeled cRNA was performed with the “Quick Amp Labeling kit, one color” (#5190-0442, Agilent Technologies) according to the manufacturer’s recommendations. cRNA fragmentation, hybridization and washing steps were also carried-out exactly as recommended: “One-Color Microarray-Based Gene Expression Analysis Protocol V5.7” (see http://www.agilent.com for details). Slides were scanned on the Agilent Micro Array Scanner G2565CA (pixel resolution 5 µm, bit depth 20). Data extraction was performed with the “Feature Extraction Software V10.7.3.1” by using the recommended default extraction protocol file: GE1_107_Sep09.xml. Normalization. The single channel data generated by the Feature Extraction software were normalized and analyzed in Genespring GX software, version 11.5.1 (Agilent Technologies). Expression values were log2 transformed, normalized to 75th percentile of each array and inter array median centered according to the standard procedure in Genespring GX. Identification of RelA- and K5-dependent gene sets. According to their annotation in EntrezGene, out of 44397 probes 35843 probes corresponding to 28299 genes were selected. Of these, 24902 probes corresponding to 19833 genes showed hybridization signals above the 20% percentile in at least 4 of the 24 microarray hybridizations and were marked as measurable fluorescence intensity values in at least 16 out of 24 hybridizations. In this data set 419 probes corresponding to 398 genes were regulated by 1h or 8h TNF stimulation by at least two-fold in both independent experiments in rela-deficient fibroblasts stably reconstituted with wild type mRelA. In addition to the regulation by TNF, these genes showed a mean raw expression value above or equal to 50 fluorescence units across all 24 hybridizations. Thereof a total of 197 probe values corresponding 185 genes indicated differential regulation by two-fold compared to averaged values from wild type-reconstituted cells in at least one of the experiments using K5 mutants at least one time point. For these 185 genes, average ratios values of the wild-type reconstituted cells, and, individual ratio values for either K5 reconstituted cell line compared to the WT-reconstituted cells, were analyzed by hierarchical cluster analysis using MeV MultiExperimentViewer, version 4.6.2, 2011, (www.tm4.org) with cluster settings “complete” as linkage method and “Pearson correlation” for distance measure (Saeed et al 2003). A distance threshold of 2.065 resulted in 10 gene clusters, marked by blue triangles as shown in Fig. 5E. Ratio values for rela-/- cells were not included in the cluster analysis but are displayed along the gene list to facilitate identification of RelA-dependent genes. Chromatin immunoprecipitation. Cells were cross-linked with 1% (v/v) formaldehyde, collected and then lysed in RIPA buffer [10 mM Tris pH 7.5, 150 mM NaCl, 1% (v/v) NP-40, 1% (w/v) Na-Deoxycholate, 0.1% (w/v) SDS, 1 mM EDTA and 10 µg/ml aprotinin]. DNA was sheared by sonification using a Branson sonifier 250. After removal of cellular debris by centrifugation, equal amounts of DNA were incubated with 2 μg of anti-RelA, anti-HA, anti-CBP, anti-Acetyl H3 or control IgG antibodies previously bound to ChIP-grade protein G-coupled magnetic beads (Cell Signaling; Danvers, Massachusetts, USA). After rotating for 2 h at 4°C on a spinning wheel, the magnetic beads were washed five times using the following buffers: RIPA buffer (twice), RIPA high-salt buffer [2 M NaCl, 10 mM Tris pH 7.5, 1% (v/v) NP-40, 0.5% (v/v) Na-Deoxycholate and 1 mM EDTA], RIPA and TE buffer (10 mM Tris pH 7.5 and 1 mM EDTA). The precipitated fragments were eluted with TE buffer containing 1% SDS. 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