» Articles » PMID: 33569748

Molecular and Functional Characterization of an Anti-lipopolysaccharide Factor Mm-ALF from Speckled Shrimp Metapenaeus Monoceros

Overview
Authors
Affiliations
Soon will be listed here.
Abstract

Anti-lipopolysaccharide factors (ALFs) are antimicrobial peptides of approximately 100 amino acid residues with a broad spectrum of antimicrobial activity. It is an amphipathic peptide with an N-terminal hydrophobic region and a lipopolysaccharide binding domain (LBD). In the present study, we report an isoform of the anti-lipopolysaccharide factor (Mm-ALF) from the speckled shrimp, Metapenaeus monoceros. A 359 bp cDNA encoded 119 amino acids, and the sequence showed 99.16% similarity to ALF from the shrimp Fenneropenaeus indicus. The mature peptide of 94 amino acids has a net charge of +8, molecular weight 10.62 kDa, and pI 10.11. The mature peptide Mm-ALF was recombinantly expressed in E. coli Rosetta-gami cells, and the peptide was isolated and purified. The rMm-ALF exhibited notable antibacterial activity against Gram-positive (Staphylococcus aureus and Bacillus cereus) and Gram-negative (Escherichia coli, Edwardsiella tarda, Aeromonas hydrophila, Pseudomonas aeruginosa, Vibrio parahaemolyticus, Vibrio harveyi, Vibrio alginolyticus, Vibrio proteolyticus, Vibrio cholerae and Vibrio fluvialis) bacteria.

References
1.
Tanaka S, Nakamura T, Morita T, Iwanaga S . Limulus anti-LPS factor: an anticoagulant which inhibits the endotoxin mediated activation of Limulus coagulation system. Biochem Biophys Res Commun. 1982; 105(2):717-23. DOI: 10.1016/0006-291x(82)91493-0. View

2.
Ponprateep S, Tharntada S, Somboonwiwat K, Tassanakajon A . Gene silencing reveals a crucial role for anti-lipopolysaccharide factors from Penaeus monodon in the protection against microbial infections. Fish Shellfish Immunol. 2011; 32(1):26-34. DOI: 10.1016/j.fsi.2011.10.010. View

3.
Supungul P, Klinbunga S, Pichyangkura R, Hirono I, Aoki T, Tassanakajon A . Antimicrobial peptides discovered in the black tiger shrimp Penaeus monodon using the EST approach. Dis Aquat Organ. 2004; 61(1-2):123-35. DOI: 10.3354/dao061123. View

4.
Li S, Zhang X, Sun Z, Li F, Xiang J . Transcriptome analysis on Chinese shrimp Fenneropenaeus chinensis during WSSV acute infection. PLoS One. 2013; 8(3):e58627. PMC: 3602427. DOI: 10.1371/journal.pone.0058627. View

5.
Li S, Lv X, Li F, Xiang J . Characterization of a Lymphoid Organ Specific Anti-lipopolysaccharide Factor From Shrimp Reveals Structure-Activity Relationship of the LPS-Binding Domain. Front Immunol. 2019; 10:872. PMC: 6499195. DOI: 10.3389/fimmu.2019.00872. View