Format

Send to

Choose Destination
See comment in PubMed Commons below
Bioinformatics. 2010 Jun 15;26(12):i228-36. doi: 10.1093/bioinformatics/btq197.

Modularity and directionality in genetic interaction maps.

Author information

1
School of Computer Science and Engineering, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

Abstract

MOTIVATION:

Genetic interactions between genes reflect functional relationships caused by a wide range of molecular mechanisms. Large-scale genetic interaction assays lead to a wealth of information about the functional relations between genes. However, the vast number of observed interactions, along with experimental noise, makes the interpretation of such assays a major challenge.

RESULTS:

Here, we introduce a computational approach to organize genetic interactions and show that the bulk of observed interactions can be organized in a hierarchy of modules. Revealing this organization enables insights into the function of cellular machineries and highlights global properties of interaction maps. To gain further insight into the nature of these interactions, we integrated data from genetic screens under a wide range of conditions to reveal that more than a third of observed aggravating (i.e. synthetic sick/lethal) interactions are unidirectional, where one gene can buffer the effects of perturbing another gene but not vice versa. Furthermore, most modules of genes that have multiple aggravating interactions were found to be involved in such unidirectional interactions. We demonstrate that the identification of external stimuli that mimic the effect of specific gene knockouts provides insights into the role of individual modules in maintaining cellular integrity.

AVAILABILITY:

We designed a freely accessible web tool that includes all our findings, and is specifically intended to allow effective browsing of our results (http://compbio.cs.huji.ac.il/GIAnalysis).

SUPPLEMENTARY INFORMATION:

Supplementary data are available at Bioinformatics online.

PMID:
20529911
PMCID:
PMC2881382
DOI:
10.1093/bioinformatics/btq197
[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Silverchair Information Systems Icon for PubMed Central
    Loading ...
    Support Center