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Identification and characterization of antimicrobial peptides from the skin of the endangered frog Odorrana ishikawae.

Abstract：

:The endangered anuran species, Odorrana ishikawae, is endemic to only two small Japanese Islands, Amami and Okinawa. To assess the innate immune system in this frog, we investigated antimicrobial peptides in the skin using artificially bred animals. Nine novel antimicrobial peptides containing the C-terminal cyclic heptapeptide domain were isolated on the basis of antimicrobial activity against Escherichia coli. The peptides were members of the esculentin-1 (two peptides), esculentin-2 (one peptide), palustrin-2 (one peptide), brevinin-2 (three peptides) and nigrocin-2 (two peptides) antimicrobial peptide families. They were named esculentin-1ISa, esculentin-1ISb, esculentin-2ISa, palustrin-2ISa, brevinin-2ISa, brevinin-2ISb, brevinin-2ISc, nigrocin-2ISa and nigrocin-2ISb. Peptide primary structures suggest a close relationship with the Asian odorous frogs, Odorrana grahami and Odorrana hosii. These antimicrobial peptides possessed a broad-spectrum of growth inhibition against five microorganisms (E. coli, Staphylococcus aureus, methicillin-resistant S. aureus, Bacillus subtilis and Candida albicans). Nine different cDNAs encoding the precursor proteins were also cloned and showed that the precursor proteins exhibited a signal peptide, an N-terminal acidic spacer domain, a Lys-Arg processing site and an antimicrobial peptide at the C-terminus.

journal_name

Peptides

journal_title

Peptides

authors

Iwakoshi-Ukena E,Ukena K,Okimoto A,Soga M,Okada G,Sano N,Fujii T,Sugawara Y,Sumida M

doi

10.1016/j.peptides.2010.12.013

subject

Has Abstract

pub_date

2011-04-01 00:00:00

pages

670-6

issue

4

eissn

0196-9781

issn

1873-5169

pii

S0196-9781(10)00541-3

journal_volume

32

pub_type

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