Biocomputational characterization and evolutionary analysis of bubaline dicer1 enzyme

Area of Science:

• Molecular Biology
• Genomics
• Evolutionary Biology

Background:

• Dicer is a key enzyme in microRNA (miRNA) and small interfering RNA (siRNA) biogenesis, critical for post-transcriptional gene regulation.
• The Dicer enzyme's role and characteristics are understudied in Indian water buffalo, a species valued for disease resistance and milk production.

Purpose of the Study:

• To determine the primary coding sequence of bubaline Dicer1.
• To biocomputationally characterize bubaline Dicer1 and analyze its phylogenetic signature among higher eukaryotes.
• To investigate evolutionary divergence and selection pressures on the Dicer enzyme.

Main Methods:

• Sequencing of the bubaline Dicer1 primary coding sequence (5,778 bp).
• Biocomputational characterization and phylogenetic analysis using evolutionary tree construction.
• Analysis of evolutionary divergence and selection pressures using MEGA6 and Datamonkey server (SLC, FEL, REL models).
• Comparative analysis of Dicer1 domain structure.

Main Results:

• The bubaline Dicer1 sequence was determined (GenBank: AB969677.1).
• Phylogenetic analysis revealed bubaline Dicer1 is closely related to cattle and other ruminants, distinct from lower species.
• Evolutionary analysis indicated Dicer has undergone purifying selection, with conserved domains across mammals but variations in lower organisms.

Conclusions:

• Bubaline Dicer1 exhibits conserved features with mammalian Dicer1 but shows divergence from lower eukaryotes.
• The study provides foundational data on bubaline Dicer1, contributing to understanding its role in gene regulation and evolution in Indian water buffalo.