TransTermHP

TransTermHP identifies rho-independent (intrinsic) transcription terminators in bacterial genomes by detecting hairpin structures followed by thymine-rich DNA sequences to define transcription termination sites.

Key Features:

• Rapid Detection: Computationally scans genomic sequences to detect Rho-independent terminators based on hairpin and downstream thymine-rich motifs.
• High Accuracy and Confidence Scoring: Assigns confidence values to each predicted terminator and reports a 93% detection rate with a 6% false positive rate for known terminators in Bacillus subtilis.
• Extensive Genome Coverage: Applied to predict terminator locations in 343 prokaryotic genomes, enabling large-scale genome-wide prediction.
• Insights into Genomic Organization and Annotation: Uses terminator predictions to inform bacterial genome organization and improve annotation of transcription units.
• Identification of DNA Uptake Signal Sequences: Detects exogenous DNA uptake signal sequences embedded within terminator hairpins, including signals in Neisseria, Pasteurellaceae, Haemophilus ducreyi, and Mannheimia succiniciproducens.

Scientific Applications:

• Transcription termination analysis: Comparative analysis of rho-independent termination across diverse bacterial species.
• Genome annotation: Integration of terminator predictions to refine annotation of genes and transcriptional units in prokaryotic genomes.
• Horizontal gene transfer studies: Investigation of DNA uptake signal sequences within terminators to study mechanisms of genetic exchange.

Methodology:

Detects hairpin structures followed by thymine-rich tracts to predict rho-independent terminators, assigns confidence scores to predictions, applies these predictions across 343 prokaryotic genomes, and searches predicted hairpins for embedded DNA uptake signal sequences.