Journal: Journal of Proteome Research
Article Title: A Study into the ADP-Ribosylome of IFN-γ-Stimulated THP-1 Human Macrophage-like Cells Identifies ARTD8/PARP14 and ARTD9/PARP9 ADP-Ribosylation
doi: 10.1021/acs.jproteome.8b00895
Figure Lengend Snippet: GPS leads to the identification of ADP-ribosylated ARTDs/PARPs other than ARTD1/PARP1. (A) A comparison using Venn diagrams for ADPr peptides found in two replicates for full scan (400–1500 m / z ) and combined 4× GPS scans (GPS-1, 400–605; GPS-2, 595–805; GPS-3, 795–1005; GPS-4, 995–1200 m / z ). (B) A comparison of ADPr peptides found in control and IFN-γ-treated THP-1 cells for the full scan and combined 4× GPS scans. (C) Sequence motif analysis for ADPr acceptor amino acids (N, number of ADPr peptides used for the analysis). (D) A plot of the number of ADP-ribosylation sites per protein. (E) Comparison of ADPr peptide abundances between control and IFN-γ in each replicate; regression lines, 95% confidence interval, and standard error of estimate (SEE) are provided (red dots are outliers). (F) MS/MS spectra of an ARTD8/PARP14 ADPr peptide using PRM acquisitions. Black peaks were manually annotated. *, ADPr site. (G) A comparison of the number of proteins identified in the Af1521 elution (ADPr proteins) and input samples (backbone proteins) per replicate. (H) A comparison of the relative changes to ADPr peptides versus their backbone proteins in response to IFN-γ (IFN-γ/control).
Article Snippet: ARTD8/PARP14 recombinant human protein (amino acids 1470–1801, catalytic domain only; 4.0 μg, BPS Bioscience, San Diego, CA, Cat# 80514) alone, and 1.0 μg of ARTD8/PARP14 with signal transducer and activator of transcription 1 (STAT1) recombinant human protein (4.0 μg, Thermo Fisher Scientific, Waltham, MA, Cat# PHF0011) were incubated in a reaction buffer [50 μM β-nicotinamide adenine dinucleotide (β-NAD, Sigma-Aldrich, Cat# N0632), 50 mM Tris-HCl pH 7.4 (Boston Bio Products, Ashland, MA, Cat# BM-314)] for 1 h at room temperature.
Techniques: Sequencing, Tandem Mass Spectroscopy