tmRDB (tmRNA database)

Area of Science:

• Molecular Biology
• Bioinformatics
• Genomics

Background:

• tmRNA, a unique molecule combining transfer RNA (tRNA) and messenger RNA (mRNA) functions, plays a crucial role in bacterial trans-translation.
• This molecule is widespread, found in most bacteria and in organelles like chloroplasts and mitochondria.
• Understanding tmRNA is vital for deciphering gene expression regulation and protein synthesis in prokaryotes and some eukaryotes.

Purpose of the Study:

• To update and expand the tmRNA database (tmRDB) with new sequences and associated data.
• To provide researchers with comprehensive and accessible information on tmRNA.
• To improve the usability of tmRNA data for computational analysis.

Main Methods:

• Curated collection and integration of new tmRNA sequences.
• Bioinformatic analysis for predicting tmRNA-encoded tag peptides.
• Generation of tmRNA alignments using manual curation and computational tools.
• Development of secondary structures and 3D models in PDB format.

Main Results:

• The tmRDB now contains 86 tmRNAs, an increase of 26 sequences from the previous release.
• Predicted tmRNA-encoded tag peptides are provided for each sequence.
• tmRNA alignments with structural annotations are available in multiple formats, including a new, computationally friendly column format.
• Secondary structures and 3D models are accessible for representative tmRNAs.

Conclusions:

• The updated tmRDB serves as a valuable resource for studying tmRNA and trans-translation.
• Enhanced data formats and structural information facilitate further research and computational analysis.
• The database expansion supports a deeper understanding of tmRNA's role across diverse organisms.