The Critical Role That Spectral Libraries Play in Capturing the Metabolomics Community Knowledge

Overview

Journal Metabolomics

Publisher Springer

Specialty Endocrinology

Date 2022 Nov 21

PMID 36409434

Authors

Wout Bittremieux

Mingxun Wang

Pieter C Dorrestein

Affiliations

Soon will be listed here.

Abstract

Background: Spectral library searching is currently the most common approach for compound annotation in untargeted metabolomics. Spectral libraries applicable to liquid chromatography mass spectrometry have grown in size over the past decade to include hundreds of thousands to millions of mass spectra and tens of thousands of compounds, forming an essential knowledge base for the interpretation of metabolomics experiments.

Aim Of Review: We describe existing spectral library resources, highlight different strategies for compiling spectral libraries, and discuss quality considerations that should be taken into account when interpreting spectral library searching results. Finally, we describe how spectral libraries are empowering the next generation of machine learning tools in computational metabolomics, and discuss several opportunities for using increasingly accessible large spectral libraries.

Key Scientific Concepts Of Review: This review focuses on the current state of spectral libraries for untargeted LC-MS/MS based metabolomics. We show how the number of entries in publicly accessible spectral libraries has increased more than 60-fold in the past eight years to aid molecular interpretation and we discuss how the role of spectral libraries in untargeted metabolomics will evolve in the near future.

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