online bioinformatics resources -...
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ONLINE BIOINFORMATICS RESOURCES Introduction to Molecular Biology and Bioinformatics (IMBB) 2014
Dedan Githae Email: [email protected] BecA-ILRI Hub; Nairobi, Kenya 16 May, 2014
The larger picture..
• Lower cost, Improved efficiency and modern
technology:
The sequencers, computers, and rate at which
data is being produced have all increased in
speed - huge amounts of biological data
produced at a FASTER rate than interpreted.
• Storage and Exchange of data:
Need to improve database design, develop better
software for database access / manipulation,
harmonize data-entry procedures to compensate
for the varied computer procedures and systems
used in different laboratories
Computing power, access to information (data) and right software (tools)
has enabled scientists increase rate at answering research questions and
new discoveries
Online Bioinformatics resources
• INFORMATION • Journals / publications, • biological research data.
• TOOLS – Programs to analyse data
Information
Journal Website: Almost every major journal has a web access to abstracts is usually free, even when the content is subscription.
E-journals: Some electronic journals are online-only journals; some are online
versions of printed journals, and some consist of the online equivalent of a printed
journal, but with additional online-only (sometimes video and interactive media)
material.
Information
Servers (eg NCBI Pubmed; Google scholar; SCOPUS) A search engine to search references and abstracts on life sciences and biomedical topics in multiple databases
Sequence Databases
Primary Databases: International Nucleotide Sequence Database Collaboration comprises of • GenBank (USA), • European Nucleotide Archive (Europe)
and • DNA DataBase of Japan.
They cooperate to make all publicly
available sequences available.
http://www.ncbi.nlm.nih.gov
http://www.ebi.ac.uk/ena/
Sequence Databases
Secondary Databases
UniProt: It is a database of protein sequence and functional information. Information about the biological function of proteins derived from the research literature
Available under Uniprot
SWISS PROT: Manually annotated and reviewed
TrEMBL: Automatically annotated and not reviewed.
Uniprot: www.uniprot.org
Other Databases
Multigenome: ensembl: genome databases for vertebrates and other eukaryotic species, Genome specific databases: eg Wormbase; Saccharomyces database; Vectorbase; Flu DB; Zebrafish Model Organisms, Flybase etc. NB: You can also access to these genomes from the public databases
Biochemical pathway databases: Biological activities are orchestrated by various molecules These include KEGG; ExPASY; MetaCyc; BioPath Gene expression Data: DNA Microarrays: array of probe molecules that can bind specific DNA / mRNA. Fluoro-labelling enables viewing level of expression of genes; eg NCBI Geo (Gene experssion omnibus) Expression Atlas (EBI)
2D PAGE: allows quantitative study of protein concentration in the cell. Eg SWISS-2D PAGE www.yeastgenome.org/
www.fudb.org
www.zfin.org
www.wormbase.org/
http://vectorbase.org/
http://www.metacyc.org/
KEGG: http://www.genome.jp
http://web.expasy.org/pathways/
http://www.molecular-networks.com/databases/biopath
http://www.ncbi.nlm.nih.gov/geo/
http://www.ebi.ac.uk/gxa
http://world-2dpage.expasy.org/swiss-2dpage/
Protein Structure Databases
Protein Databank (PDB) (experimentally validated)
Secondary & Others:
ModBase: A database of annotated comparative protein structure models Modelled proteins) SCOP: Structural classification of Proteins Depending on α ; β ; α+β ; membrane & cell surface proteins; small
proteins; coiled coil proteins, etc CATH: hierarchical domain classification of protein structures in the Protein Data Bank (Class | Architecture |
Topology | Homologous superfamilies)
www.pdb.org
https://modbase.compbio.ucsf.edu/modweb/
Softwares / Tools
Sources of (informative) tools:
• Journals eg Bioinformatics, Nucleic Acids Research, Journal of Molecular Biology, Protein science publish papers on cutting edge developments and innovations in computational biology methods • Most biological databases have software resource listings- eg Sequence searching, visualisation resources (genome / alignment / genome level). • Web servers: “Simple” web implementation of the softwares. Clear inputs, outputs, parameters, graphical data representation and downloadable results.
Basic tasks
Task Objective Tool
Sequence similarity Identify homologous sequences to gain information
BLAST; SSEARCH; FASTA, ENA search
Sequence alignment Identify conserved regions, domains, motifs
CLUSTAL; Muscle;
Gene finding Identify coding regions in gDNA sequences
GENSCAN; ORFinder; GRAIL
DNA Translation Convert DNA Sequence to protein
Various servers and tools eg ExPasy, Transeq, EBI, and ORFinders
Local pairwise alignment Detect short regions of homology in longer sequences
BLAST; FASTA
Global pairwise alignment Find the best full length alignment in 2 sequences
ALIGN
http://web.expasy.org/translate/
http://www.ebi.ac.uk/Tools
http://www.ebi.ac.uk/Tools
A protein domain is a conserved part of a given protein sequence and structure that can evolve, function, and exist independently of the rest of the protein chain.
Molecular evolution uses domains as building blocks and these may be recombined in different arrangements to create proteins with different functions.
Databases include: SMART; PROSITE; NCBI; CATH
Protein Domains
http://prosite.expasy.org/
http://smart.embl-heidelberg.de/
GLYCINAMIDE RIBONUCLEOTIDE SYNTHETASE (GAR-SYN) FROM E. COLI.
A motif is a locally, conserved region / short
sequence pattern shared by set of sequence;
(Multiple sequence analysis)
Thus can be indicative of function / structural
similarities. Can be displayed via Sequence logos,
or as patterns of amino acids.
Motifs
Patterns of amino acids [PROSITE]:
For example N-glycosylation site motif takes the form:
N{P}[ST]{P}
To mean:
Asn, followed by anything but Pro, followed by either Ser or Thr, followed by
anything but Pro
DSSP: Wolfgang Kabsch and Chris Sander
EXPASY: seconadary structure prediction
JPRED 3: from university of Dundee
PDB: DSSP prediction
Honorable mention
About PredictProtein
PredictProtein integrates feature prediction for secondary structure, solvent accessibility, transmembrane helices, globular regions, coiled-coil regions, structural switch regions, B-values, disorder regions, intra-residue contacts, protein-protein and protein-DNA binding sites, sub-cellular localization, domain boundaries, beta-barrels, cysteine bonds, metal binding sites and disulphide bridges.
Listed below is a comprehensive list of methods and databases currently incorporated into the server.
Integrated Methods Method Name Description Reference Web Server Download
PROFphd Prediction of secondary structure and solvent accessibility - - ftp://rostlab.org/profphd
PHDhtm Prediction of transmembrane helices - - ftp://rostlab.org/profphd
PROFtmb Prediction of transmembrane beta-barrels - - ftp://rostlab.org/proftmb
NORSp Predictor of non-regular secondary structure - - ftp://rostlab.org/norsp
NCOILS Calculates the probability that the sequence will adopt a coiled-coil conformation - - -
SEG Identifies low complexity regions - - -
DISULFIND Prediction of disulfide bridges - - ftp://rostlab.org/profbval
PROFBval Prediction of residue mobility - - ftp://rostlab.org/profbval
NorsNet Prediction protein disordered sites - - ftp://rostlab.org/norsnet
UCON Contact based prediction of disordered sites - -
METADISORDER Consensus based prediction of protein disorder - -
ISIS Prediction of protein-protein interaction sites - -
LocTree2 Prediction of sub-cellular localization for all domains of life - - -
MetaStudent Prediction of GO terms for Molecular Function and Biological Process - - ftp://rostlab.org/metastudent
SNAP2 Prediction of functional changes due to single nucleotide polymorphism - - -
ConSurf Prediction of functional changes due to single nucleotide polymorphism - - -
Supporting Databases Database Name Description Reference Download
UniRef Used for sequence homology searches by PSI-BLAST abstract http://www.uniprot.org/help/uniref
PDB The PDB archive contains information about experimentally-determined
structures of proteins, nucleic acids, and complex assemblies. As a
member of the wwPDB, the RCSB PDB curates and annotates PDB
data according to agreed upon standards. abstract http://www.rcsb.org/pdb/download/download.do
Pfam A collection of protein families abstract ftp://ftp.sanger.ac.uk/pub/databases/Pfam/releases/
PROSITE Database of biologically significant sites, patterns and profiles abstract ftp://ftp.expasy.org/databases/prosite/
In a Nutshell… There is vast amount of available out there….
There is a vast number of tools out there..
Select best that is applicable for your project..
Dedan Githae Bioinformatician
BecA-ILRI Hub [email protected]
Online Bioinformatics resources http://hub.africabiosciences.org
Thank you