Related Experiment Video
Updated: Jun 12, 2026

12:00
A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
Bridges: a tool for identifying local similarities in long sequences
Alexey S Kondrashov1, Raquel Assis
1Center for Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI 48109, USA. kondrash@umich.edu
Bioinformatics (Oxford, England)
|June 22, 2010
Summary
Bridges is a heuristic search tool for identifying sequence similarities. This tool efficiently compares large genome datasets in a single run, offering adjustable sensitivity and specificity through 20 parameters.
Area of Science:
- Bioinformatics
- Computational Biology
- Genomics
Background:
- Bridges is a heuristic search tool developed using the C programming language.
- It is compatible with all platforms and its source code is publicly available.
- Documentation and source code can be accessed at http://github.com/rassis/bridges.
Purpose of the Study:
- To introduce Bridges, a novel heuristic search tool for sequence similarity identification.
- To describe the stages and capabilities of the Bridges tool for efficient data analysis.
Main Methods:
- Bridges employs short word matches to detect local similarities within sequences.
- The tool operates in three distinct stages: filtering input sequences, identifying local similarities, and post-processing these similarities.
- Input sequence data is released from memory post-filtering, enabling efficient comparison of genome-scale datasets.
Main Results:
- Bridges facilitates rapid identification of local similarities between biological sequences.
- The tool's architecture allows for efficient, single-run comparisons of large genome-scale datasets.
- Users can customize search sensitivity and specificity using 20 adjustable parameters.
Conclusions:
- Bridges is an effective heuristic search tool for rapid local sequence similarity identification.
- Its design enables efficient genome-scale data comparison in a single run.
- The tool offers flexibility through user-adjustable parameters for tailored search performance.
Related Concept Videos
Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Multi-species Conserved Sequences
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
RNA-seq
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while microarray-based...
Sanger Sequencing
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
Gene Duplication and Divergence
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.

