Question

Which of the following is the sequence alignment tool ?

• A. BLAST
• B. PRINT
• C. PROSITE
• D. PIR

Hint:

- BLAST: Used for rapid pairwise sequence database searches.
- ClustalW Muscle: Used for Multiple Sequence Alignment (MSA).
- FASTA: Another classic sequence alignment heuristic algorithm.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
In bioinformatics, sequence alignment is a way of arranging the sequences of DNA, RNA, or protein to identify regions of similarity that may be a consequence of functional, structural, or evolutionary relationships between the sequences.

Step 2: Detailed Explanation:
Let us analyze each of the biological databases and computational tools provided in the options:
- BLAST (Basic Local Alignment Search Tool):
BLAST is an algorithm and program for comparing primary biological sequence information, such as the amino-acid sequences of proteins or the nucleotides of DNA sequences.
A BLAST search enables a researcher to compare a query sequence with a library or database of sequences, and identify library sequences that resemble the query sequence above a certain threshold.
Thus, BLAST is a classical and widely used sequence alignment tool.
- PRINT PRINTS:
PRINTS is a database of protein family fingerprints, which are groups of conserved motifs used to characterize a protein family.
It is a diagnostic database rather than a direct sequence alignment tool.
- PROSITE:
PROSITE is a database of protein families and domains that contains biologically significant sites, patterns, and profiles.
It helps identify to which known family a new sequence belongs, using pattern matching rather than performing pairwise or multiple sequence alignment.
- PIR (Protein Information Resource):
PIR is an integrated public bioinformatics resource that supports genomic, proteomic, and systemic biology research, primarily maintaining databases of protein sequences.

Step 3: Final Answer:
Therefore, BLAST is the sequence alignment tool.