trimAl

trimAl removes spurious sequences and poorly aligned regions from multiple sequence alignments to improve alignment quality for downstream analyses such as phylogenetic inference.

Key Features:

• Automated Alignment Trimming: Identifies and removes unreliable positions from multiple sequence alignments.
• Parameters Considered: Uses proportion of sequences with a gap, level of amino acid similarity, and consistency across different alignments when available.
• Adaptive Parameter Optimization: Automatically selects optimal trimming parameters for each alignment to improve signal-to-noise ratio.
• Scalability for Large-Scale Analyses: Designed to process thousands of alignments for large-scale phylogenetic studies.
• Platform Portability: Implemented in C++ and portable across computing platforms.

Scientific Applications:

• Phylogenetic Analysis: Improves alignment quality to increase accuracy of phylogenetic tree inference and evolutionary studies.
• Protein Structure Prediction: Produces higher-quality alignments that support more reliable protein structure prediction.
• Comparative Genomics: Generates reliable sequence alignments for comparative analyses across species.

Methodology:

Automated identification and removal of unreliable alignment positions based on thresholds for proportion of gaps, amino acid similarity, and consistency across alignments, with automatic selection of optimal parameters per alignment; implemented in C++ and scalable to thousands of alignments.