PT  - JOURNAL ARTICLE
AU  - Fernando Vargas
AU  - Kelly C. Weldon
AU  - Nicole Sikora
AU  - Mingxun Wang
AU  - Zheng Zhang
AU  - Emily C. Gentry
AU  - Morgan W. Panitchpakdi
AU  - Mauricio Caraballo
AU  - Pieter C. Dorrestein
AU  - Alan K. Jarmusch
TI  - Protocol for Community-created Public MS/MS Reference Library Within the GNPS Infrastructure
AID  - 10.1101/804401
DP  - 2019 Jan 01
TA  - bioRxiv
PG  - 804401
4099  - http://biorxiv.org/content/early/2019/10/15/804401.short
4100  - http://biorxiv.org/content/early/2019/10/15/804401.full
AB  - Rationale A major hurdle in identifying chemicals in mass spectrometry experiments is the availability of MS/MS reference spectra in public databases. Currently, scientists purchase databases or use public databases such as GNPS. The MSMS-Chooser workflow empowers the creation of MS/MS reference spectra directly in the GNPS infrastructure.Methods An MSMS-Chooser sample template was completed with the required information and sequence tables were generated programmatically. Standards in methanol-water (1:1) solution (1 μM) were placed into wells individually. An LC-MS/MS system using data-dependent acquisition in positive and negative modes was used. Species that may be generated under typical ESI conditions are chosen. The MS/MS spectra and MSMS-Chooser sample template were subsequently uploaded to MSMS-Chooser in GNPS for automatic MS/MS spectral annotation.Results Data acquisition quickly and effectively collected MS/MS spectra. MSMS-Chooser was able to accurately annotate 99.2% of the manually validated MS/MS scans that were generated from the chemical standards. The output of MSMS-Chooser includes a table ready for inclusion in the GNPS library (after inspection) as well as the ability to directly launch searches via MASST. Altogether, the data acquisition, processing, and upload to GNPS took ~2 hours for our proof-of-concept results.Conclusions The MSMS-Chooser workflow enables the rapid data acquisition, analysis, and annotation of chemical standards, and uploads the MS/MS spectra to community-driven GNPS. MSMS-Chooser democratizes the creation of MS/MS reference spectra in GNPS which will improve annotation and strengthen the tools which use the annotation information.