The genomics of gene expression

Area of Science:

• Genomics
• Molecular Biology
• Genetics

Background:

• Studying gene regulation at a genomic scale is challenging due to slow identification of trans-regulatory factors and limited characterization of cis-regulatory sequences.
• A small fraction of vertebrate genes have had their cis-regulatory sequences described.
• Understanding transcriptional regulation is crucial for complex genomes.

Purpose of the Study:

• To explore cis- and trans-regulatory mechanisms on a global scale.
• To utilize gene expression as a surrogate for transcriptional regulation.
• To gain insights into the role of transcriptional regulation in genome organization.

Main Methods:

• Genome-scale transcriptional profiling.
• Studies of genetic variation.
• Classical genetic techniques like linkage analysis.
• Examination of allelic expression patterns to reveal cis-regulatory variability.

Main Results:

• Gene expression serves as a surrogate for transcriptional regulation.
• Combining transcriptional profiling with genetic variation studies offers insights.
• Allelic expression patterns highlight cis-regulatory variability.

Conclusions:

• Indirect approaches using gene expression and genetic variation are effective for assessing regulatory mechanisms globally.
• These methods provide valuable insights into the organization of complex genomes.
• Transcriptional regulation plays a significant role in genome organization.