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Dracula's children: molecular evolution of vampire bat venom
Dolyce H W Low1, Kartik Sunagar, Eivind A B Undheim
1Venom Evolution Lab, School of Biological Sciences, University of Queensland, St. Lucia, Queensland 4072, Australia.
Journal of Proteomics
|June 11, 2013
Summary
Vampire bat venom contains more proteins than previously known, including novel forms of known components and new peptides. These findings reveal complex venom evolution and offer potential for drug discovery.
Area of Science:
- Biochemistry
- Molecular Biology
- Evolutionary Biology
Background:
- Vampire bat oral secretions, particularly Desmodus rotundus salivary plasminogen activator (DSPA) and Draculin, are well-researched.
- Previous studies focused on limited venom components, leaving other bioactive proteins and gland evolution unexamined.
Purpose of the Study:
- To comprehensively analyze the proteomic and transcriptomic profiles of vampire bat submaxillary gland secretions.
- To investigate the molecular evolution of venom components and understand gland lobe gene expression.
- To identify novel bioactive proteins for potential drug development.
Main Methods:
- Combined proteomic and transcriptomic analysis of vampire bat submaxillary gland secretions.
- Identification and characterization of expressed proteins and peptides.
- Molecular evolutionary analysis of identified venom components.
Main Results:
- Identical proteins are expressed in both anterior and posterior submaxillary gland lobes.
- A novel DSPA isoform and a full-length Draculin (a mutated lactoferrin) were identified.
- New venom components, including allergen-like, CRiSP, kallikrein, Kunitz, lysozyme, calcitonin, PACAP, statherin, BPI-fold, lacritin, and secretoglobin peptides, were discovered.
- Positive selection drives the evolution of venom proteins, potentially aiding immune evasion through surface chemistry mutation.
Conclusions:
- Vampire bat venom composition is more complex than previously understood.
- The study provides insights into the molecular evolutionary history of vampire bat venom.
- Newly discovered peptides represent valuable resources for biodiscovery and drug development.
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