1) There are several major proteomics repositories that serve different purposes, including repositories that store raw data without reprocessing it (PRIDE Archive, MassIVE, jPOST, iProx, PASSEL) and repositories that reprocess all raw data using standardized methods (PeptideAtlas, GPMDB, proteomicsDB, Human Proteome Map). 2) The document outlines the types of information commonly stored in proteomics repositories, including raw data, identification results, quantification, and metadata. It also discusses standards for file formats. 3) Data sharing in proteomics is becoming more important, driven by journals and funders, to enable reproducible science and maximize the value of research findings. Repositories support

1. Proteomics repositories
Dr. Juan Antonio Vizcaíno
EMBL-EBI
Hinxton, Cambridge, UK

2. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Why sharing MS proteomics data?
• Types of information stored in MS proteomics
repositories.
• Main existing repositories and their main
characteristics
• No data reprocessing
• Data reprocessing
• Other resources
Overview

3. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Corresponding public repositories
Genomics
Transcript-
omics
Proteomics
DNA sequence databases
(GenBank, EMBL, DDJB)
ArrayExpress (EBI), GEO (NCBI)
MS proteomics resources (ProteomeXchange)
Metabolomics MetaboLights (MetabolomeXchange)

4. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Data sharing in Proteomics
• Proteomics data can be very complex and its interpretation is
often troublesome and/or controversial.
• In other ‘omics’ fields, data sharing ‘culture’ is well established.
Generally, it is considered to be a good scientific practise.
• In proteomics, the ‘culture’ is definitely evolving in that direction.
A big shift is happening in the last few years.
• Scientific journals and funding agencies are two of the main
drivers.

5. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Reproducible Science
http://www.nature.com/nature/focus/reproducibility/

6. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
What is a proteomics publication in 2018?
• Proteomics studies generate potentially large amounts of
data and results.
• Ideally, a proteomics publication needs to:
• Summarize the results of the study
• Provide supporting information for reliability of any
results reported
• Information in a publication:
• Manuscript
• Supplementary material
• Associated data submitted to a public repository

7. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Journal Submission Recommendations
•Journal guidelines recommend and/or mandate submission
to proteomics repositories:
§ Journals from the Nature group
§ Molecular and Cellular Proteomics
§ Journal of Proteome Research
§ PLOS journals
•Funding agencies are enforcing public deposition of data to
maximize the value of the funds provided.

8. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Why sharing MS proteomics data?
• Types of information stored in MS proteomics
repositories
• Main existing repositories and their main
characteristics
• No data reprocessing
• Data reprocessing
• Other resources
Overview

9. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Main types of information stored
• 1) Original experimental data recorded by the mass
spectrometer (primary data) -. Raw data and peak lists.
• 2) Identification results inferred from the original primary
data
• 3) Quantification information
• 4) Experimental and technical metadata
• 5) Any other type of information (e.g. scripts)

10. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Current PSI Standard File Formats for MS
• mzMLMS data
• mzIdentMLIdentification
• mzQuantMLQuantitation
• mzTabFinal Results
• TraMLSRM

11. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Why sharing MS proteomics data?
• Types of information stored in MS proteomics
repositories.
• Main existing repositories and their main
characteristics
• No data reprocessing
• Data reprocessing
• Other resources
Overview

12. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Proteomics repositories
• Many different workflows need to be supported. They provide
complementary ‘views’.
• No data reprocessing. Data is stored as ‘published’ or
originally analysed:
• PRIDE Archive (focused on MS/MS data, all supported)
• MassIVE (focused on MS/MS data)
• jPOST (focused on MS/MS data)
• iProx (focused on MS/MS data)
• PASSEL (only SRM data)
• Data reprocessing (MS/MS data):
• PeptideAtlas and GPMDB
• proteomicsDB and HPM

13. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Why sharing MS proteomics data?
• Types of information stored in MS proteomics
repositories.
• Main existing repositories and their main
characteristics
• No data reprocessing
• Data reprocessing
• Other resources
Overview

14. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Resources that don’t reprocess data
1) Resources that try to represent the authors’ analysis
view on the data.
• Various workflows are allowed and they can provide
complementary results.
• Data are not ‘updated’ in time. However, meta-analysis
on top is possible.
• Accumulation of FDRs when datasets are combined.
• Main representatives: PRIDE Archive and MassIVE
(MS/MS data) and PeptideAtlas/PASSEL (SRM data).
• Data standards are essential.

15. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Proteomics repositories
• Many different workflows need to be supported. They provide
complementary ‘views’.
• No data reprocessing. Data is stored as ‘published’ or
originally analysed:
• PRIDE Archive (focused on MS/MS data, all supported)
• MassIVE (focused on MS/MS data)
• jPOST (focused on MS/MS data)
• iProx (focused on MS/MS data)
• PASSEL (only SRM data)
• Data reprocessing (MS/MS data):
• PeptideAtlas and GPMDB
• proteomicsDB and HPM

16. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
•PRIDE stores mass spectrometry (MS)-
based proteomics data:
•Peptide and protein expression data
(identification and quantification)
•Post-translational modifications
•Mass spectra (raw data and peak lists)
•Technical and biological metadata
•Any other related information
•Full support for tandem MS approaches
•Any type of data can be stored.
PRIDE (PRoteomics IDEntifications) Archive
http://www.ebi.ac.uk/pride/archive
Martens et al., Proteomics, 2005
Vizcaíno et al., NAR, 2016

17. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
MassIVE (UCSD)
http://proteomics.ucsd.edu/service/massive/
• Data repository for MS proteomics data
• Tools available for users to analyse their own data
• Joined ProteomeXchange on June 2014.
• Starting to reanalyse datasets.

18. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
.) .)
. (
• Joined ProteomeXchange
on July 2016

19. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
iProX: The Chinese proteomics repository
http://www.iprox.org

20. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Suitable for SRM assays
• Use the PSI standard TraML
plus the output of the most
popular vendor pipelines
• Started in 2012
• Part of the ProteomeXchange
consortium
http://www.peptideatlas.org/passel/
Farrah et al., Proteomics, 2012
PASSEL: repository for SRM data

21. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Why sharing MS proteomics data?
• Types of information stored in MS proteomics
repositories.
• Main existing repositories and their main
characteristics
• No data reprocessing
• Data reprocessing
• Other resources
Overview

22. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Proteomics repositories
• Many different workflows need to be supported. They provide
complementary ‘views’.
• No data reprocessing. Data is stored as ‘published’ or
originally analysed:
• PRIDE Archive (focused on MS/MS data, all supported)
• MassIVE (focused on MS/MS data)
• jPOST (focused on MS/MS data)
• iProx (focused on MS/MS data)
• PASSEL (only SRM data)
• Data reprocessing (MS/MS data):
• PeptideAtlas and GPMDB
• proteomicsDB and HPM

23. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Reprocessing repositories
• These resources collect MS raw data and reprocess it using
one given analysis pipeline, and an up to date protein
sequence database.
• Advantage: They provide a ‘standardized’ and updated view
on the experimental data available.
• Only one common analysis method is used and there can be
information loss.
• Different from the author’s view on the data.
• Main resources: GPMDB and PeptideAtlas (ISB, Seattle).
• Novel resources: proteomicsDB and the Human Proteome Map.

24. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
http://www.peptideatlas.org
- Developed at the Institute for Systems
Biology (ISB, Seattle, USA)
- Peptide identifications from MS/MS
approaches
- Data are reprocessed using the popular
Trans Proteomic Pipeline (TPP)
- Uses PeptideProphet to derive a
probability for the correct identification for
all contained peptides
PeptideAtlas
Deutsch et al., Proteomics, 2005
Desiere et al., NAR, 2006.
Deutsch et al., EMBO Rep, 2008

25. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• All peptides IDs are mapped to
Ensembl using ProteinProphet (to
handle protein inference)
• Provides proteotypic peptide
predictions
• Limited metadata available
• Part of the HPP project
Deutsch et al., Proteomics, 2005
Desiere et al., NAR, 2006.
Deutsch et al., EMBO Rep, 2008
PeptideAtlas

26. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Builds are updated in a regular basis (usually once a
year)
Examples of builds:
- Human (HPP context)
- Human plasma
- Human urine
- Human phospho-proteome
- Drosophila
- Mouse
- Mouse plasma
- Cow
- Yeast
- Pig
…
PeptideAtlas builds

27. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Originally developed by R.
Beavis & R. Craig
• End point of the GPM
proteomics pipeline, to aid in
the process of validating
peptide MS/MS spectra and
protein coverage patterns.
• Platform for “Proteomics data
analysis, reuse and validation
for biomedical research”.
http://gpmdb.thegpm.org/
Craig et al., J Proteome Res, 2004
GPMDB (Global Proteome Machine DB)

28. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Data are reprocessed using
the popular X!Tandem or
X!Hunter spectral searching
algorithm
• Also provides proteotypic
peptides
GPMDB

29. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Nice visualization features
• Provides very limited
annotation with GO, BTO
• Some support to targeted
approaches is available
• Part of the HPP consortium
GPMDB

30. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Proteomics repositories
• Many different workflows need to be supported. They provide
complementary ‘views’.
• No data reprocessing. Data is stored as ‘published’ or
originally analysed:
• PRIDE Archive (focused on MS/MS data, all supported)
• MassIVE (focused on MS/MS data)
• jPOST (focused on MS/MS data)
• iProx (focused on MS/MS data)
• PASSEL (only SRM data)
• Data reprocessing (MS/MS data):
• PeptideAtlas and GPMDB
• proteomicsDB and HPM

31. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Draft Human proteome papers published in 2014
Wilhelm et al., Nature, 2014 Kim et al., Nature, 2014
•Two independent groups claimed to have produced the
first complete draft of the human proteome by MS.
• Some of their findings are controversial and need further
validation… but generated a lot of discussion and put
proteomics in the spotlight.
•Two proteomics resources have been developed:
proteomicsDB and the Human Proteome Map (HPM).Nature cover 29 May 2014

32. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
ProteomicsDB https://www.proteomicsdb.org/
• Data analysis using Mascot and MaxQuant
• The way the Protein FDR was original calculated is controversial
•Quantification information using label free techniques (Batch effects)
•New datasets are added in a regular basis

33. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
proteomicsDB (2)

34. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Human Proteome Map (HPM)
• Developed by the Pandey group.
• Data reanalysis using Mascot.
• Protein FDR is not mentioned at all in the
corresponding Nature paper.
• Static resource: it will not be updated
any longer.
http://www.humanproteomemap.org/

35. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Why sharing MS proteomics data?
• Types of information stored in MS proteomics
repositories.
• Main existing repositories and their main
characteristics
• No data reprocessing
• Data reprocessing
• Other resources
Overview

36. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Chorus
https://chorusproject.org/pages/ind
ex.html
• Developed by M. MacCoss’ group in
Seattle (UW).
• Built on top of Amazon Cloud
technologies
• Provides data analysis capabilities for
the users
• Free for public datasets.
• The objective is to connect the data to
analysis tools in a cloud environment

37. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
MaxQB
MaxQB

38. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
CPTAC data portal

39. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Panorama Public
https://panoramaweb.org

40. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
• Importance of sharing MS proteomics data.
• The main existing proteomics repositories are
complementary in focus and functionality.
• Main characteristics of:
• PeptideAtlas and GPMDB (Reprocess data)
• PASSEL, MassIVE, jPOST, iProX and PRIDE
Archive (they do not reprocess data, not their main
mission).
• proteomicsDB, HPM.
Conclusions

41. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018
Recommended reading

42. Juan A. Vizcaíno
juan@ebi.ac.uk
WT Proteomics Bioinformatics Course 2018
Hinxton, 19 July 2018