Related Experiment Videos
Putative homeodomain proteins identified in prokaryotes based on pattern and sequence similarity
Shashi Kant1, Ashima Bagaria, S Ramakumar
1School of Biotechnology, Madurai Kamaraj University, 625021, Madurai, India.
Biochemical and Biophysical Research Communications
|November 20, 2002
Summary
Researchers discovered a DNA-binding motif, similar to eukaryotic homeodomains, in bacteria. This finding suggests a shared evolutionary origin for DNA-binding proteins across different life forms.
Area of Science:
- Microbiology
- Molecular Biology
- Genomics
Background:
- Eukaryotic homeodomains are crucial transcription factors regulating development.
- These domains are sequence-related to a newly identified putative homeodomain in eubacteria.
Purpose of the Study:
- To identify and characterize a putative homeodomain in eubacterial genomes.
- To investigate the evolutionary relationship between eukaryotic and prokaryotic DNA-binding motifs.
Main Methods:
- Utilized PROSITE database for eukaryotic homeodomain protein sequence signatures.
- Employed BLAST suite for sequence similarity searches across various eubacterial genomes.
Main Results:
- A putative homeodomain was identified in several eubacterial genomes, including pathogens.
- Sequence analysis confirmed similarity to eukaryotic homeodomain transcription factors.
- Evidence suggests the presence of a DNA-binding motif in prokaryotes analogous to eukaryotes.
Conclusions:
- The study provides evidence for a conserved DNA-binding motif across prokaryotic and eukaryotic domains.
- This finding has implications for understanding gene regulation and evolution in bacteria.