Overview  Introduction  Biological network data  Text mining  Gene Ontology  Expression data basics  Expression, text mining, and GO  Modules and.

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Presentation transcript:

Overview  Introduction  Biological network data  Text mining  Gene Ontology  Expression data basics  Expression, text mining, and GO  Modules and complexes  Domains and conclusion

Domain Interaction networks  Protein domain basics  Applications of domain interaction networks  Inferring domain interaction networks  Domain interaction networks in Cytoscape.

Facts about protein structure 1. Protein structures are built from domains. 2. Domain composition implies protein function.

Protein domains come in families

Domains can be recognized through sequence similarity Source: people/rob/sf/sf.html

Interactions are often domain-specific Source: cabm/faculty_stock.asp

Why study protein domain interactions?  A putative protein-protein interaction is more reliable if the proteins have domains that might interact.  If something disrupts the protein sequence, it might disrupt the domain, and thus the network  Genetic or somatic mutations  Splice variation

Exon Intron Exon DNA Pre-mRNA Transcription mRNA Splicing Protein Translation

Single Protein-Protein Interaction

Structural Protein Domain Architecture UBLUBAXPCUBA

Which part of the proteins interact? 1. Protein structure: which domain structures are complementary? 2. Domain co-occurrence: which domains tend to appear in the same proteins? 3. Rosetta stone: are any domains fused in other proteins? 4. Yeast two-hybrid domain interactions: coming soon.

Which part of these proteins interact? JosephinUIM ! UBLUBAXPCUBA Databases such as InterDom provide putative interactions of Pfam domains

Domain interaction networks

For this hands-on session  Explore usage of the Cytoscape Domain Network builder plugin  Fill out your evaluation sheets.