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Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

1.8K
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
1.8K
Mass Spectrometry: Overview01:19

Mass Spectrometry: Overview

9.0K
Mass spectrometry is an analytical technique used to determine the molecular mass and molecular formula of a compound. The basic principle of mass spectrometry is to generate ions from the analyte molecule and measure these ion abundances against their molecular mass. One common type of ionization, known as electron ionization or EI, bombards the analyte molecules in the gas phase with high-energy electron beams. The electron beams displace an electron from the molecule and leave behind a...
9.0K
Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

2.5K
Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...
2.5K
Mass Spectrometry: Isotope Effect01:13

Mass Spectrometry: Isotope Effect

4.3K
Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of a molecule is different depending on the specific isotope of its elements involved. As a result, the mass spectrum of the molecule exhibits peaks from the same fragment at multiple positions. The positions of these mass signals depend on the mass differences between isotopes. Furthermore, the intensity of these signals is dependent on the...
4.3K
Mass Spectrometry of Amines01:15

Mass Spectrometry of Amines

5.4K
In mass spectroscopy, amines undergo fragmentation to give parent ions with odd molecule weights. This observed mass spectrum follows the nitrogen rule; a molecule with an odd number of nitrogen atoms produces a molecular ion with an odd molecular weight. Amines undergo fragmentation through α cleavage, producing nitrogen-containing cations—iminium ions—and alkyl radicals. Mass spectra of aromatic and cyclic aliphatic amines exhibit strong molecular ion peaks, but acyclic...
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Chemical Ionization (CI) Mass Spectrometry01:21

Chemical Ionization (CI) Mass Spectrometry

1.6K
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
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Complete Workflow for Analysis of Histone Post-translational Modifications Using Bottom-up Mass Spectrometry: From Histone Extraction to Data Analysis
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Nextflowを用いた定量的DIA質量分析のための完全なデータ分析ワークフロー

Mats Perk1, Sami Pietilä1, Tommi Välikangas1

  • 1Turku Bioscience Centre, University of Turku and Åbo Akademi University, FI-20520 Turku, Finland.

Journal of proteome research
|February 6, 2026
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まとめ
この要約は機械生成です。

glaDIAtor-nfは、複雑なデータ独立型取得（DIA）質量分析プロテオミクスデータを分析するためのNextflowワークフローを開発しました。このツールは、公開データセットを効率的に再分析し、乳がん研究などの隠れたプロテオームパターンを明らかにします。

キーワード:
データ分析データ非依存型取得質量分析Nextflow定量的プロテオミクス

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科学分野:

  • プロテオミクス
  • 質量分析
  • バイオインフォマティクス

背景:

  • データ独立型取得（DIA）質量分析は、包括的なタンパク質プロファイリングを提供しますが、大規模で複雑なデータセットを生成します。
  • DIAデータの分析には、複雑なパイプラインと高性能コンピューティングを管理するための堅牢な計算ツールが必要です。

研究 の 目的:

  • ターゲットを絞らないDIA質量分析プロテオミクスデータ分析のためのNextflowベースのワークフローであるglaDIAtor-nfを紹介すること。
  • glaDIAtor-nfの公開データセットの再分析およびこれまで隠されていた生物学的洞察の発見における有用性を実証すること。

主な方法:

  • Nextflowワークフロー管理システムを使用したglaDIAtor-nfの開発。
  • ゴールドスタンダードデータセットを使用した厳密な技術的検証。
  • 公開乳がんプロテオミクスデータへの適用。

主要な成果:

  • glaDIAtor-nfは、DIA質量分析データの分析において技術的な精度を実証しました。
  • glaDIAtor-nfを用いた公開乳がんデータの再分析により、これまで検出されなかったプロテオームパターンが明らかになりました。
  • この研究は、効率的なツールを用いた既存の公開データの再分析の可能性を強調しています。

結論:

  • glaDIAtor-nfは、大規模なDIAプロテオミクスデータ分析のための効率的かつ自動化されたソリューションを提供します。
  • このワークフローは、公開リポジトリからの新しい生物学的洞察の発見を促進します。
  • 公開プロテオミクスデータの広範な再分析を可能にするためのユーザーフレンドリーなツールの重要な必要性があります。