Top-down characterization of mouse core histones.
Bingbing XueKaijie XiaoZhixin TianPublished in: Journal of mass spectrometry : JMS (2019)
Histone post-translational modifications (PTMs) play various roles in chromatin-related cellular processes, and comprehensive analysis of these combinatorial PTMs at the intact protein level by top-down proteomics is the method of choice to reveal their crosstalk and biological functions. Here, we report our top-down characterization of the core histones from mouse fibroblasts cells NIH/3T3, which is a classic model used in many kinds of research. With nanoRPLC-MS/MS analysis and ProteinGoggle database search, 547 protein species were identified with spectrum-level FDR ≤ 1%, where PTMs in 51 protein species were unambiguously localized with PTM scores ≥1. High-resolution MS/MS data also allowed the unambiguous identification of acetylation instead of trimethylation. This study presents a general picture of combinatorial PTMs of mouse core histones, which serves as a basic reference for all future related biological studies.
Keyphrases
- ms ms
- high resolution
- protein protein
- mass spectrometry
- amino acid
- genome wide
- induced apoptosis
- binding protein
- transcription factor
- dna methylation
- single cell
- liquid chromatography tandem mass spectrometry
- machine learning
- oxidative stress
- decision making
- cell proliferation
- drug induced
- histone deacetylase
- gas chromatography