(A) Synthetic scheme for H4K12su. (i) An H4(1–14)K12aux peptide was ligated with a SUMO-3 (2–91) C47S α-thioester. (ii) The sumoylated H4(1–14) peptidyl hydrazide containing the auxiliary was …
Unedited intact SDS-PAGE gels for all gel images shown in Figure 1.
(A) Scheme outlining the p300 histone acetyltransferase assay with octamer and mononucleosome substrates. (B) Cartoon representation of SUMO-3 showing all surface-exposed lysine residues in stick …
Unedited intact SDS-PAGE gels and western blot membranes for all gel and western blot images shown in Figure 1—figure supplement 1.
(A) Scheme outlining steps during the in vitro transcription assay with chromatinized plasmids, nuclear extracts, activator Gal4-VP16 and p300. (B) Micrococcal nuclease digestion analysis of …
Unedited intact TBE gel for chromatin digestion gel shown in Figure 2.
Asterisk indicates BSA used as a stabilizer.
Unedited intact SDS-PAGE gel showing protein components of the in vitro transcription assay.
(A) Extracted ion chromatograms of all H4(4–17) tryptic peptides obtained after SDS-PAGE resolution and in-gel trypsination of acetylated chromatin containing wild-type (wt) H4. (B) Extracted ion …
Excel file listing all mass spectral data plotted in Figure 3, Tables 1–4; and Figure 3—figure supplements 2–7.
Gel bands excised for tandem mass spectrometry (MS-MS) analysis are indicated.
(A) Representative tandem mass spectrometry (MS-MS) spectrum of tetra-acetylated tryptic peptide H4(4–17) generated after in vitro acetylation of chromatinized plasmids containing wild-type (wt) H4 …
(A) Representative tandem mass spectrometry (MS-MS) spectrum of tri-acetylated tryptic peptide H4(4–17) generated after in vitro acetylation of chromatinized plasmids containing wild-type (wt) H4 …
(A) Representative tandem mass spectrometry (MS-MS) spectrum of di-acetylated tryptic peptide H4(4–17) generated after in vitro acetylation of chromatinized plasmids containing wild-type (wt) H4 …
(B) Peptide fragment-ion maps of the four possible tri-acetylated H4(4–17) peptide patterns, indicating all ions identified over three spectra. Acetylation on K12 in H4K12su is not possible due to …
(B) Peptide fragment-ion maps of the six possible di-acetylated H4(4–17) peptide species, indicating all ions identified over three spectra.
(B) Peptide fragment-ion map of the unmodified H4(4–17) peptide, indicating identified ions.
(A) Extended micrococcal nuclease digestion of chromatin to generate mononucleosomes that were detected by the presence of ~150 bp DNA in 1.5% agarose gels. (B) Immunoprecipitation (IP) from HEK293 …
Unedited intact SDS-PAGE gels and western blot membranes for all gels and western blot images shown in Figure 4.
(A) Structure of the COMPASS eCM bound to a mononucleosome (PDB code 6UGM). The disordered H3 and H4 tails are shown in gold and blue, respectively, with the last observable amino acid indicated. …
Unedited western blot membranes for all western blot images shown in Figure 5.
The Sdc1 subunit (10 kDa) is not observed on this gel due to its size. Set1-SET is the catalytic domain. Set1-N674 includes the nSET domain, beginning at residue 674.
(A) Immunoprecipitation (IP) from HEK293 cells transfected with HA-Su3(ΔGG)-H4 (HSH4). Input (I) and eluate (E) lanes correspond to undigested bulk chromatin and eluted HA-tagged mononucleosomes …
Unedited intact gels and western blot membranes for all gels and western blot images shown in Figure 6.
H4(4–17) peptide | [M] | [M + 2 H]2+ | PSMH4 | PSMH4K12su |
---|---|---|---|---|
prGKprGGKprGLGKprGGAKprR | 1549.89 | 775.95 | n.d. | 1 |
prGKprGGKacGLGKprGGAKprR | 1535.88 | 768.95 | n.d. | n.d. |
prGKacGGKacGLGKprGGAKprR | 1521.86 | 761.94 | 2 | 3 |
prGKacGGKacGLGKacGGAKprR | 1507.85 | 754.93 | 5 | n.d.‡ |
prGKacGGKacGLGKprGGAKacR | 1507.85 | 754.93 | n.d. | 3§ |
prGKacGGKacGLGKacGGAKacR | 1493.83 | 747.92 | 7 | n.d.‡ |
Peptides were chemically propionylated before and after trypsinization to cap unmodified lysine side-chains and newly generated N-termini.
Tandem mass spectrometry (MS-MS) spectra observed contained major fragments for the shown modification pattern over other potential patterns, however, no singly acetylated peptides were observed for wild-type (wt) H4.
Acetylation at K12 is not possible for H4K12su.
The triply acetylated peptide from H4K12su is blocked from acetylation at K12, but is propionylated after in-gel desumoylation. PSM = peptide spectral match. n.d. = not detected.
Species | Ion | % of Total ion intensity | Avg. ratio | |
---|---|---|---|---|
K5ac, K8ac | b5+ | 1.316 | 1.654 | 12.4 |
K5pr, K8pr | 0.072 | 0.253 | ||
K12ac, K16ac | y9+ | 0.042 | 0.306 | 0.2 |
K12pr, K16pr | 3.176 | 0.971 |
Only two unique spectra were observed and analyzed for the doubly acetylated and propionylated H4(4–17) tail peptide from wild-type (wt) H4 chromatin.
Species | Ion | % of Total ion intensity | Avg. ratio | ||
---|---|---|---|---|---|
K5ac, K8ac, K12ac | b9+ | 3.032 | 4.938 | 3.981 | 24.1 ± 13.3 |
K5ac, K8ac, K12pr | 0.339 | 0.096 | 0.147 | ||
K5ac, K8ac, K12ac | b10+ | 0.875 | 0.862 | 1.109 | 10.3 ± 5.1 |
K5ac, K8ac, K12pr | 0.112 | 0.152 | 0.064 | ||
K12pr, K16ac | y8+ | 0.271 | n.d. | 0.012 | 0.2 |
K12ac, K16pr | 0.885 | 1.005 | 1.263 | ||
K12pr, K16ac | y9+ | n.d. | 0.123 | 0.054 | 0.02 |
K12ac, K16pr | 2.587 | 4.442 | 6.296 |
Three unique spectra corresponding to the tri-acetylated and propionylated H4(4–17) tail peptide from wild-type (wt) H4 chromatin were analyzed. Error reported is standard deviation of the mean. n.d. = not detected.
Species | Ion | % of Total ion intensity | Avg. ratio | ||
---|---|---|---|---|---|
K5ac, K8ac | b5+ | 2.096 | 2.308 | 1.770 | 71.6 |
K5pr, K8pr | n.d. | 0.071 | 0.016 | ||
K5ac, K8ac | b6+ | 2.603 | 2.835 | 2.900 | 33.1 |
K5pr, K8pr | 0.053 | n.d. | 0.170 | ||
K12pr, K16ac | y6+ | 0.038 | 0.080 | n.d. | 0.04 |
K12pr, K16pr | 1.227 | 1.378 | 1.375 | ||
K12pr, K16ac | y8+ | 0.027 | 0.013 | 0.138 | 0.1 ± 0.09 |
K12pr, K16pr | 0.815 | 0.732 | 0.677 |
Three unique spectra corresponding to the di-acetylated and propionylated H4(4–17) tail peptide from H4K12su chromatin were analyzed. Error reported is standard deviation of the mean. n.d. = not detected.
Reagent type (species) or resource | Designation | Source or reference | Identifiers | Additional information |
---|---|---|---|---|
Chemical compound, drug | Acetyl-CoA | Roche | 10101893001 | Co-factor for p300 enzyme |
Commercial assay or kit | Calcium Phosphate Transfection Kit | Thermo | K278001 | Mammalian cell transfection |
Commercial assay or kit | Lipofectamine 3000 | Invitrogen | L3000001 | Mammalian cell transfection |
Other | Anti-DYKDDDDK G1 (mouse monoclonal) Affinity Resin | GenScript | L00432 | Antibody-conjugated resin for IP |
Other | HisPur Ni-NTA resin | Thermo | 88221 | Affinity purification resin |
Other | Anti-HA (mouse monoclonal) magnetic beads | Pierce | 88836; RRID:AB_2861399 | Antibody-conjugated resin for IP |
Peptide, recombinant protein | Micrococcal nuclease solution | Thermo | 88216 | Digestion of dsDNA |
Other | cOmplete, Mini, EDTA-free protease inhibitor cocktail | Roche | 11836170001 | Protease inhibitor cocktail |
Chemical compound, drug | [3H]-acetyl-CoA | American Radiolabeled Chemicals | ART0213B | Radioactive co-factor for p300 |
Peptide, recombinant protein | Pierce Trypsin Protease, MS Grade | Thermo | 90057 | Protein cleavage C-terminal to Arg/Lys |
Chemical compound, drug | Propionic anhydride | Sigma-Aldrich | P51478 | Propionylation of peptide lysines and N-terminus |
Other | DMEM | Gibco | 11956118 | Cell culture medium |
Other | DPBS | Gibco | 14190250 | Cell culture PBS buffer |
Other | Fetal bovine serum | Gibco | 16000044 | Cell culture medium additive |
Other | Amplify fluorographic reagent | GE Amersham | NAMP100 | Tritium decay signal amplifier |
Other | Kodak GBX developer and fixer | Carestream Health | 1900943 | Immunoblot imaging reagents |
Chemical compound, drug | Trifluoroacetic acid | Alfa Aesar | AA31771-36 | Peptide synthesis reagent |
Chemical compound, drug | Formic acid | Acros Organics | AC147932500 | Ion-pairing agent for HPLC |
Chemical compound, drug | Acetonitrile (ACN) | Fisher | A996 | Solvent for HPLC |
Other | C18 Zip tip | Millipore | ZTC18S096 | Peptide purification |
Chemical compound, drug | Glacial acetic acid | Fisher | A38C-212 | Additive for HPLC solvent |
Strain, strain background (Escherichia coli) | E. coli BL21(DE3) competent cells | Thermo | FEREC0114 | Chemically competent cells |
Strain, strain background (Escherichia coli) | E. coli DH5α competent cells | NEB | C2987HVIAL | Chemically competent cells |
Cell line (Homo sapiens) | HEK 293T | ATCC | CRL-3216; RRID:CVCL_0063 | For transient transfection |
Cell line (Homo sapiens) | Flp-In T-Rex 293 cell line | Invitrogen | R78007 | Stable cell line generation |
Recombinant DNA reagent | pST100-20xNCP601a | Gift from Dr Robert K McGinty | – | Plasmid containing 20 repeats of Widom 601 sequence |
Recombinant DNA reagent | pcDNA3.1-p300-His6 | Addgene | 23252; RRID:Addgene_23252 | Plasmid for full-length p300 |
Recombinant DNA reagent | pET28a-His6-SENP2(365–590) | Addgene | 16357; RRID:Addgene_16357 | Plasmid for SUMO protease catalytic domain |
Recombinant DNA reagent | pcDNA3.1-HA-SUMO-3(ΔGG)-H4 | GenScript | – | This study; generated plasmid containing indicated CDS |
Recombinant DNA reagent | pcDNA5-FLAG-HA-SUMO-3(ΔGG)H4(Δ1–11) | This study | – | This study; plasmid generated containing indicated CDS |
Sequence-based reagent | p300_Ctrm_FLAG_R | IDT | – | 5’-ATC CTT GTA ATC GTG TAT GTC TAG TGT ACT C-3’ |
Sequence-based reagent | p300_Ctrm_FLAG_F | IDT | – | 5’-GAT GAC GAT AAA TAG TGA TAC TAA GCT TAA GTT TAA AC-3’ |
Antibody | Rabbit polyclonal anti-acetyllysine antibody | Millipore | AB3879; RRID:AB_11214410 | WB (1:2000) dilution |
Antibody | Rabbit polyclonal anti-H4K16ac antibody | Active Motif | 39167; RRID:AB_2636968 | WB (1:2000) dilution |
Antibody | Rabbit polyclonal anti-H4K12ac antibody | Active Motif | 39066 | WB (1:2000) dilution |
Antibody | Rabbit monoclonal anti-H3K4me1 | Cell Signaling Technology | 5326; RRID:AB_10695148 | WB (1:2000) dilution |
Antibody | Rabbit polyclonal anti-H3K4me2 | Abcam | ab7766; RRID:AB_2560996 | WB (1:2000) dilution |
Antibody | Rabbit polyclonal anti-H3K4me3 | Abcam | ab8580; RRID:AB_306649 | WB 1:2000 dilution |
Antibody | Rabbit polyclonal anti-Histone H3 | Abcam | ab1791; RRID:AB_302613 | WB (1:2000) dilution |
Antibody | Mouse monoclonal anti-Histone H3 | Abcam | ab24834; RRID:AB_470335 | WB (1:2000) dilution |
Antibody | Rabbit monoclonal anti-HA | Cell Signaling Technology | 3724; RRID:AB_1549585 | WB (1:2000) dilution |
Antibody | Mouse monoclonal anti-FLAG | Sigma-Aldrich | F1804; RRID:AB_262044 | WB (1:2000) dilution |
Antibody | Anti-rabbit monoclonal, HRP conjugated | GE Healthcare | NA934; RRID:AB_2722659 | WB (1:40000) dilution |
Antibody | IRDye 680RD Goat polyclonal anti-Rabbit IgG | Li-COR Biosciences | 926–68071; RRID:AB_10956166 | WB (1:15000) dilution |
Antibody | IRDye 800CW Goat polyclonal anti-Rabbit IgG | Li-COR Biosciences | 926–32211; RRID:AB_621843 | WB (1:15000) dilution |
Antibody | IRDye 800CW Goat polyclonal anti-Mouse IgG | Li-COR Biosciences | 926–32210; RRID:AB_621842 | WB (1:15000) dilution |