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Antibacterial Properties and Potential Mechanism of Serum from Chinese Alligator.

Authors :
Hu, Meng-Yuan
Chen, Yi-Wen
Chai, Zhi-Fan
Wang, Yin-Zhi
Lin, Jian-Qing
Fang, Sheng-Guo
Source :
Microorganisms; Nov2022, Vol. 10 Issue 11, p2210, 13p
Publication Year :
2022

Abstract

The Chinese alligator (Alligator sinensis) is an ancient reptile with strong immunity that lives in wetland environments. This study tested the antibacterial ability of Chinese alligator serum (CAS) against Klebsiella pneumoniae, Escherichia coli, Staphylococcus aureus, and Pseudomonas aeruginosa and analyzed the potential underlying mechanisms. Results showed that the CAS had a marked antibacterial effect on K. pneumoniae, E. coli, and P. aeruginosa, while S. aureus was only mildly affected. However, these effects disappeared when Protease K was added to the serum. The serum proteome analysis revealed that the antibacterial ability of CAS was produced by interactions among various proteins and that the complement proteins played a major antibacterial role. Therefore, we made relevant predictions about the structure and function of complement component 3. In addition, sequence alignment and phylogenetic analysis of complement component 3d (C3d) in four mammalian species and two alligator species showed that the amino acids that make up the acid pocket on the concave surface of alligator C3d are not identical to those in mammals. This study provided evidence that CAS elicits significant antibacterial effects against some pathogens and provides the basis for further development of novel antibacterial drugs. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20762607
Volume :
10
Issue :
11
Database :
Complementary Index
Journal :
Microorganisms
Publication Type :
Academic Journal
Accession number :
160464503
Full Text :
https://doi.org/10.3390/microorganisms10112210