CRAMP Analogues Having Potent Antibiotic Activity against Bacterial, Fungal, and Tumor Cells without Hemolytic Activity

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Title
CRAMP Analogues Having Potent Antibiotic Activity against Bacterial, Fungal, and Tumor Cells without Hemolytic Activity
Author(s)
Song Yub Shin; Shin Won Kang; Dong Gun Lee; Soo Hyun Eom; Woo Keun Song; Jae Il Kim
Bibliographic Citation
Biochemical and Biophysical Research Communications, vol. 275, no. 3, pp. 904-909
Publication Year
2000
Abstract
CRAMP-18 (GEKLKKIGQKIKNFFQKL) is the anti-bacterial sequence derived from CRMAP, a member of cathelicidin-derived antimicrobial peptides. To develop the novel antibiotic peptides useful as therapeutic drugs requires strong antibiotic activity against bacterial and fungal cells without hemolytic effect. To this goal, the analogues were designed to increase only net positively charge by Lys-substitution of positions 2, 9, 13, or 16 at the hydrophilic helix face of CRAMP-18 without any change at the hydrophobic helix face. In particular, Lys-substitution (K2-CRAMP-18) of position 2 in CRAMP-18 induced the enhanced antibiotic activity without any increase in hemolysis. Thus, this peptide may provide a useful template for the design novel antibiotic peptides for the treatment of infectious diseases. Additional CD spectra studies suggested that the α-helical structure of the peptides plays an important role in killing bacterial and fungal cells, but the increase of α-helical content is less connected with the enhanced antibiotic activity.
Keyword
Cathelicidin-derived antimicrobial peptideCRAMP-18Hemolytic activityLys-substitution
ISSN
0006-291X
Publisher
Elsevier
DOI
http://dx.doi.org/10.1006/bbrc.2000.3269
Type
Article
Appears in Collections:
1. Journal Articles > Journal Articles
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