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Sigma54 enhancer binding proteins and Myxococcus xanthus fruiting body development
Jimmy S Jakobsen1, Lars Jelsbak, Lotte Jelsbak
1Departments of Biochemistry and Developmental Biology, Stanford University, Stanford, California 94305, USA.
Journal of Bacteriology
|June 19, 2004
Summary
Researchers identified 53 sigma54-dependent enhancer binding proteins (EBPs) in Myxococcus xanthus. Six EBPs showed increased expression during development, with three novel genes impacting fruiting body morphology.
Area of Science:
- Microbiology
- Molecular Biology
- Genomics
Background:
- Myxococcus xanthus undergoes complex multicellular development.
- Sigma54-dependent enhancer binding proteins (EBPs) regulate gene expression in response to environmental cues.
Purpose of the Study:
- To identify and characterize EBPs involved in Myxococcus xanthus development.
- To investigate the role of novel EBPs in fruiting body formation.
Main Methods:
- Genome-wide search for EBP homologs using the M1genome sequence.
- Construction and application of a DNA microarray for gene expression analysis.
- Gene inactivation (knockout) studies to assess developmental phenotypes.
Main Results:
- Identified 53 EBP homologs in M. xanthus.
- Discovered 11 transcription factors with increased expression during development.
- Six EBP homologs showed significantly higher expression during development, including three previously uncharacterized genes.
- One knockout mutant exhibited abnormal fruiting body morphology dependent on media composition.
Conclusions:
- Several EBPs are differentially regulated during M. xanthus development.
- Novel EBPs play a role in regulating the morphology of fruiting bodies.
- This study provides insights into the transcriptional regulation of developmental processes in M. xanthus.