Title:β Pore-forming Protein-based Evolutionary Divergence of Gnathostomata
from Agnatha
Volume: 30
Issue: 8
Author(s): Bhupendra Kumar, Mohd Kashif*, Ahad Amer Alsaiari, Mohammad Imran Khan, Abul Kalam, Abrar Ahmad, Rayees Ahmad Lone, Mazen Almehmadi, Shivanand Suresh Dudhagi and Mazin A Zamzami
Affiliation:
- Department of Biotechnology, Babasaheb Bhimrao Ambedkar University,
Lucknow, India
Keywords:
Aerolysin, gnathostome, agnatha, hydropathy, divergence, origin.
Abstract:
Introduction: The first vertebrates were jawless fish, or Agnatha, whose evolution diverged
into jawed fish, or Gnathostomes, around 550 million years ago.
Methods: In this study, we investigated β PFT proteins' evolutionary divergence of lamprey immune
protein from Agnatha, reportedly possessing anti-cancer activity, into Dln1 protein from
Gnathostomes. Both proteins showed structural and functional divergence, and shared evolutionary
origin. Primary, secondary and tertiary sequences were compared to discover functional domains
and conserved motifs in order to study the evolution of these two proteins. The structural and functional
information relevant to evolutionary divergence was revealed using hydrophobic cluster analysis.
Results: The findings demonstrate that two membrane proteins with only a small degree of sequence
identity can have remarkably similar hydropathy profiles, pointing towards conserved and
similar global structures. When facing the lipid bilayer or lining the pore lumen, the two proteins'
aerolysin domains' corresponding residues displayed a similar and largely conserved pattern.
Aerolysin-like proteins from different species can be identified using a fingerprint created by PIPSA
analysis of the pore-forming protein.
Conclusion: We were able to fully understand the mechanism of action during pore formation
through structural studies of these proteins.