Topological basis of signal integration in the transcriptional-regulatory network of the yeast, Saccharomyces cerevisiae.

ABSTRACT:

Background

Signal recognition and information processing is a fundamental cellular function, which in part involves comprehensive transcriptional regulatory (TR) mechanisms carried out in response to complex environmental signals in the context of the cell's own internal state. However, the network topological basis of developing such integrated responses remains poorly understood.

Results

By studying the TR network of the yeast Saccharomyces cerevisiae we show that an intermediate layer of transcription factors naturally segregates into distinct subnetworks. In these topological units transcription factors are densely interlinked in a largely hierarchical manner and respond to external signals by utilizing a fraction of these subnets.

Conclusion

As transcriptional re

SUBMITTER: Farkas IJ 

PROVIDER: S-EPMC1643839 | biostudies-literature | 2006 Oct

REPOSITORIES: biostudies-literature