the uni prot knowledgebase

Marie-Claude.Blatter@isb-sib.chSwiss-Prot group, GenevaSIB Swiss Institute of Bioinformatics

The UniProt knowledgebase

www.uniprot.org

a hub of integrated protein data

http://education.expasy.org/cours/Prague2011/

Science cover, february 2011

protein sequence functional information data knowledge

UniProt consortium

EBI : European Bioinformatics Institute (UK)SIB : Swiss Institute of Bioinformatics (CH)PIR : Protein information resource (US)

www.uniprot.org

UniProt databases

UniProtKB: protein sequence knowledgebase, 2 sections UniProtKB/Swiss-Prot and UniProtKB/TrEMBL (query, Blast, download) (~15 mo entries)

UniParc: protein sequence archive (ENA equivalent at the

protein level). Each entry contains a protein sequence with cross-links to other databases where you find the sequence (active or not). Not annotated (query, Blast, download) (~25 mo entries)

UniRef: 3 clusters of protein sequences with 100, 90 and 50 % identity; useful to speed up sequence similarity search (BLAST) (query, Blast, download) (UniRef100 10 mo entries; UniRef90 7 mo entries; UniRef50 3.3 mo entries)

UniMES: protein sequences derived from metagenomic projects (mostly Global Ocean Sampling (GOS)) (download) (8 mo entries, included in UniParc)

UniProt databasesThe central piece

UniProtKBan encyclopedia on proteins

composed of 2 sectionsUniProtKB/TrEMBL and UniProtKB/Swiss-Prot

unreviewed and reviewed automatically annotated and manually annotated

released every 4 weeks

UniProtKBOrigin of protein sequences

UniProtKB protein sequences are mainly derived from

- INSDC (translated submitted coding sequences - CDS)- Ensembl (gene prediction ) and RefSeq sequences- Sequences of PDB structures- Direct submission or sequences scanned from literature

Notes: - UniProt is not doing any gene prediction- Most non-germline immunoglobulins, T-cell receptors , most patent

sequences, highly over-represented data (e.g. viral antigens), pseudogenes sequences are excluded from UniProtKB, - but stored in UniParc

- Data from the PIR database have been integrated in UniProtKB since 2003.

15 %

85 %

Swiss-Prot

TrEMBL

EMBL

Automated extraction of protein sequence (translated CDS), gene name and

references.Automated annotation

Manual annotation of the sequence and associated

biological information

UniProtKB/TrEMBL

unreviewedAutomatic annotation

released every 4 weeks

One protein sequenceOne species

Automated annotationKeywords

and Gene Ontology

Automated annotationFunction, Subcellular location,

Catalytic activity, Sequence similarities…

Automated annotationtransmembrane domains,

signal peptide…

Cross-references to over 125 databases

References

Protein and gene namesTaxonomic information

UniProtKB/TrEMBLwww.uniprot.org

UniProtKB/TrEMBL

Automatic annotation Protein sequence

- The quality of the protein sequences is dependent on the information provided by the submitter of the original nucleotide entry (CDS) or of the gene prediction pipeline (i.e. Ensembl). - 100% identical sequences (same length, same organism are merged automatically).

Biological information Sources of annotation- Provided by the submitter (EMBL, PDB, TAIR…)- From automated annotation (automated generated annotation

rules (i.e. SAAS) and/or manually generated annotation rules (i.e. UniRule))

Example of fully automatic annotation: SAAS

• Rules are derived from the UniProtKB/Swiss-Prot manual annotation.

• Fully automated rule generation based on C4.5 decision tree algorithm.

• One annotation, one rule.

• High stringency – require 99% or greater estimated precision to generate annotation (test on UniProtKB/Swiss-Prot)

• Rules are produced, updated and validated at each release.

UniProtKB/TrEMBL

UniProtKB/Swiss-Prot

reviewedmanually annotated

released every 4 weeks

MSKEKFERTKPHVNVGTIGHVDHGKTTLTAAITTVLAKTYGGAARAFDQIDNAPEEKARGITINTSHVEYDTPTRHYAHVDCPGHADYVKNMITGAAQMDGAILVVAATDGPMPQTREHILLGRQVGVPYIIVFLNKCDMVDDEELLELVEMEVRELLSQYDFPGDDTPIVRGSALKALE GDAEWEAKILELAGFLDSYIPEPERAIDKPFLLPIEDVFSISGRGTVVTGRVERGIIKVGEEVEIVGIKETQKSTCTGVEMFRKLLDEGRAGENVGVLLRGIKREEIERGQVLAKPGTIKPHTKFESEVYILSKDEGGRHTPFFKGYRPQFYFRTTDVTGTIELPEGVEMVMPGDNIKMV VTLIHPIAMDDGLRFAIREGGRTVGAGVVAKVLG

One protein sequenceOne gene

One species

Manual annotationKeywords

and Gene Ontology

Manual annotationFunction, Subcellular location,

Catalytic activity, Disease, Tissue specificty, Pathway…

Manual annotationPost-translational modifications,

variants, transmembrane domains, signal peptide…

Cross-references to over 125 databases

References

Protein and gene namesTaxonomic information

Alternative products:protein sequences produced by

alternative splicing, alternative promoter usage,

alternative initiation…

UniProtKB/Swiss-Protwww.uniprot.org

UniProtKB/Swiss-Prot

Manual annotation

1. Protein sequence (merge available CDS, annotate sequence discrepancies, report sequencing mistakes…)

2. Biological information (sequence analysis, extract literature information, ortholog data propagation, …)

UniProtKB/Swiss-Prot

1- Protein sequence curation

The displayed protein sequence: …canonical, representative, consensus…

+alternative sequences (described within the entry)

1 entry <-> 1 gene (1 species)

UniProtKB/Swiss-Prot

a gene-centric view of the protein space

What is the current status?• At least 20% of Swiss-Prot entries required a

minimal amount of curation effort so as to obtain the “correct” sequence.

• Typical problems– unsolved conflicts– uncorrected initiation sites– frameshifts– wrong gene prediction– other ‘problems’

UCSC genome browserexamples of CDS annotation submitted to INSDC…

UniProtKB/Swiss-Prot

2- Biological data curation

UniProtKB/Swiss-Prot gathers data form multiple sources:

- publications (literature/Pubmed)- prediction programs (Prosite, TMHMM, …)- contacts with experts - other databases- nomenclature committees

An evidence attribution system allows to easily trace the source of each annotation

Extract literature informationand protein sequence analysis

maximum usage of controlled vocabulary

Protein and gene names

…enable researchers to obtain a summary of what is known about a protein…

General annotation (Comments)

www.uniprot.org

Human protein manual annotation: some statistics (June 2011)

Sequence annotation (Features)

…enable researchers to obtain a summary of what is known about a protein…

www.uniprot.org

Non-experimental qualifiers UniProtKB/Swiss-Prot considers both experimental and

predicted data and makes a clear distinction between both

Type of evidence QualifierStrong experimental evidence None or Ref.X

Light experimental evidence Probable

Inferred by similarity with homologous protein

By similarity

Inferred by prediction Potential

Find all the proteins localized in the cytoplasm (experimentally

proven) which are phosphorylated on a serine

(experimentally proven)

• The ‘Protein existence’ tag indicates what is the evidence for the existence of a given protein;

• Different qualifiers:1. Evidence at protein level (~18%) (MS, western blot (tissue specificity), immuno (subcellular

location),…)2. Evidence at transcript level (~19%)3. Inferred from homology (~58 %)4. Predicted (~5%)5. Uncertain (mainly in TrEMBL)

‘Protein existence’ tag

http://www.uniprot.org/docs/pe_criteria

UniProtKBAdditional information

can be found in the cross-references (to more than 140 databases)

2D gel2DBase-EcoliANU-2DPAGEAarhus/Ghent-2DPAGE (no server)COMPLUYEAST-2DPAGECornea-2DPAGE DOSAC-COBS-2DPAGEECO2DBASE (no server)OGPPHCI-2DPAGEPMMA-2DPAGERat-heart-2DPAGEREPRODUCTION-2DPAGESiena-2DPAGESWISS-2DPAGEUCD-2DPAGEWorld-2DPAGE

Family and domainGene3DHAMAPInterProPANTHERPfamPIRSFPRINTSProDomPROSITESMARTSUPFAMTIGRFAMs

Organism-specificAGDArachnoServerCGDConoServerCTDCYGD dictyBaseEchoBASEEcoGeneeuHCVdbEuPathDBFlyBaseGeneCardsGeneDB_SpombeGeneFarmGenoListGrameneH-InvDB HGNCHPA LegioListLepromaMaizeGDBMGIMIMneXtProtOrphanet PharmGKBPseudoCAPRGDSGDTAIRTubercuListWormBaseXenbaseZFIN

Protein family/groupAllergomeCAZyMEROPSPeroxiBasePptaseDBREBASETCDB

Genome annotationEnsemblEnsemblBacteriaEnsemblFungiEnsemblMetazoaEnsemblPlantsEnsemblProtistsGeneIDGenomeReviewsKEGGNMPDRTIGRUCSCVectorBase

Enzyme and pathwayBioCycBRENDAPathway_Interaction_DBReactome

OtherBindingDBDrugBank NextBio PMAP-CutDB

SequenceEMBLIPIPIRRefSeqUniGene

3D structureDisProtHSSPPDBPDBsumProteinModelPortalSMR

PTMGlycoSuiteDBPhosphoSitePhosSite

UniProtKB/Swiss-Prot:129 explicit links

and 14 implicit links!

ProteomicPeptideAtlasPRIDEProMEX

PPIDIPIntAct MINTSTRING

Phylogenomic dbseggNOGGeneTreeHOGENOMHOVERGENInParanoidOMAOrthoDBPhylomeDBProtClustDB

PolymorphismdbSNP

Gene expressionArrayExpressBgeeCleanExGenevestigatorGermOnline

Ontologies GO

The UniProt web site www.uniprot.org

• Powerful search engine, google-like and easy-to-use, but also supports very directed field searches

• Scoring mechanism presenting relevant matches first

• Entry views, search result views and downloads are customizable

• The URL of a result page reflects the query; all pages and queries are bookmarkable, supporting programmatic access

• Search, Blast, Align, Retrieve, ID mapping

Search

A very powerful text search tool with autocompletion and refinement

options allowing to look for UniProt entries and documentation by

biological information

Find all human proteins located in the nucleus

The search interface guides users with helpful suggestions and hints

Advanced Search

A very powerful search tool

To be used when you know in which entry section the information is stored

Find all the protein localized in the cytoplasm (experimentally

proven) which are phosphorylated on a serine

(experimentally proven)

Result pages: highly customizable

Result pages: downloadable

The URL can be bookmarked and manually

modified.

Blast

A tool associated with the standard options to search

sequences in different UniProt databases and

data sets

Blast: customize the result display

Blast: local alignment sequence annotation highlighting option

Align

A ClustalW multiple alignment tool with

sequence annotation highlighting option

Align

sequence annotation highlighting option

Retrieve

A UniProt specific tool allowing to retrieve a list of entries in several standard identifiers formats.

You can then query your ‘personal database’ with the UniProt search tool.

Query your own dataset

ID Mapping

Gives the possibility to get a mapping between different databases for a given

protein

These identifiers are all pointing to a TP53 (p53) protein sequence !

P04637, NP_000537, NP_001119584.1, NP_001119585.1, NP_001119584.1, NP_001119584.1, NP_001119584.1, NP_001119584.1, ENSG00000141510, CCDS11118, UPI000002ED67, IPI00025087, etc.

Download

Download UniProt http://www.uniprot.org/downloads

Canonical and isoform sequences (fasta format)

A few words on the UniProt ‘complete proteome’

sequence sets…

2’747 complete proteomes

Genome completely sequenced

Proteins mapped to the genome

Entries tagged with the KW ‘Complete proteome’

UniProtKB/Swiss-Prot isoform sequences are available in FASTA format only

Fully manually reviewed (e.g. S. cerevisiae)Partially manually reviewed (e.g. Homo sapiens)Unreviewed (e.g. Acinetobacter baumannii (strain 1656-2))

UniProtKB - complete proteomes

Can be downloaded:

From our complete proteome page www.uniprot.org/taxonomy/complete-proteomes

From the ‘ftp download ‘ page

By querying UniProtKB + download Query: organism:93062 AND keyword:"complete proteome"

UniProtKB - complete proteomes

Additional information: www.uniprot.org/faq/15

Query UniProtKB + download

Human proteome ~ 20’200 genes

Query for ‘homo sapiens’ (August 2011)• UniProtKB: 110,056 entries + alt sequences (~ 15’435) = 125’491• UniProtKB/Swiss-Prot: 20’244 entries + alt sequences (~ 15’435) =

35’679• UniProtKB/TrEMBL: 89,834 entries• RefSeq: 32’898 sequences• Ensembl: 90’720 sequences

Query for ‘homo sapiens’ + Complete proteome (KW-181)• UniProtKB: 56’392 + alt sequences (15’435) = 71’827• UniProtKB/Swiss-Prot: 20’238 + alt sequences (15’435) = 35’673• UniProtKB/TrEMBL: 36’154

92% of human entries are linked with at least one RefSeq entry…

Summary

Do not hesitate to contact us !

help@uniprot.org

The UniProt ConsortiumSIBIoannis Xenarios, Lydie Bougueleret, Andrea Auchincloss, Kristian Axelsen, Delphine Baratin, Marie-Claude Blatter, Brigitte Boeckmann, Jerven Bolleman, Laurent Bollondi, Emmanuel Boutet, Lionel Breuza, Alan Bridge, Edouard de Castro, Lorenzo Cerutti, Elisabeth Coudert, Béatrice Cuche, Mikael Doche, Dolnide Dornevil, Severine Duvaud, Anne Estreicher, Livia Famiglietti, Marc Feuermann, Sebastien Gehant, Elisabeth Gasteiger, Alain Gateau, Vivienne Gerritsen, Arnaud Gos, Nadine Gruaz-Gumowski, Ursula Hinz, Chantal Hulo, Nicolas Hulo, Janet James, Florence Jungo, Guillaume Keller, Vicente Lara, Philippe Lemercier, Damien Lieberherr, Xavier Martin, Patrick Masson, Anne Morgat, Salvo Paesano, Ivo Pedruzzi, Sandrine Pilbout, Sylvain Poux, Monica Pozzato, Manuela Pruess, Nicole Redaschi, Catherine Rivoire, Bernd Roechert, Michel Schneider, Christian Sigrist, Karin Sonesson, Sylvie Staehli, Eleanor Stanley, André Stutz, Shyamala Sundaram, Michael Tognolli, Laure Verbregue, Anne-Lise Veuthey

EBIRolf Apweiler, Maria Jesus Martin, Claire O'Donovan, Michele Magrane, Yasmin Alam-Faruque, Ricardo Antunes, Benoit Bely, Mark Bingley, David Binns, Lawrence Bower, Wei Mun Chan, Emily Dimmer, Francesco Fazzini, Alexander Fedotov, John Garavelli, Leyla Garcia Castro, Rachael Huntley, Julius Jacobsen, Michael Kleen, Duncan Legge, Wudong Liu, Jie Luo, Sandra Orchard, Samuel Patient, Klemens Pichler, Diego Poggioli, Nikolas Pontikos, Steven Rosanoff, Tony Sawford, Harminder Sehra, Edward Turner, Matt Corbett, Mike Donnelly and Pieter van Rensburg

PIRCathy H. Wu, Cecilia N. Arighi, Leslie Arminski, Winona C. Barker, Chuming Chen, Yongxing Chen, Pratibha Dubey, Hongzhan Huang, Kati Laiho, Raja Mazumder, Peter McGarvey, Darren A. Natale, Thanemozhi G. Natarajan, Jules Nchoutmboube, Natalia V. Roberts, Baris E. Suzek, Uzoamaka Ugochukwu, C. R. Vinayaka, Qinghua Wang, Yuqi Wang, Lai-Su Yeh and Jian Zhang

www.uniprot.org

UniProt is mainly supported by the National Institutes of Health (NIH) grant 1 U41 HG006104-01. Additional support for the EBI's involvement in UniProt comes from the NIH grant 2P41 HG02273-07. Swiss-Prot activities at the SIB are supported by the Swiss Federal Government through the Federal Office of Education and Science and the European Commission contracts SLING (226073), Gen2Phen (200754) and MICROME (222886). PIR activities are also supported by the NIH grants 5R01GM080646-04, 3R01GM080646-04S2, 1G08LM010720-01, and 3P20RR016472-09S2, and NSF grant DBI-0850319.

www.isb-sib.ch

Thank you for your attention

http://education.expasy.org/cours/Prague2011/