Full-Length cDNA, Prokaryotic Expression, and Antimicrobial Activity of UuHb-F-I from Urechis unicinctus.

Abstract:

:Hemoglobin, which widely exists in all vertebrates and in some invertebrates, is possibly a precursor of antimicrobial peptides (AMPs). However, AMPs in the hemoglobin of invertebrates have been rarely investigated. This study is the first to report the full-length cDNA, prokaryotic expression, and antimicrobial activity of UuHb-F-I from Urechis unicinctus. The full-length cDNA sequence of UuHb-F-I was 780 bp with an open-reading frame of 429 bp encoding 142 amino acids. MALDI-TOF-MS suggested that the recombinant protein of UuHb-F-I (rUuHb-F-I) yielded a molecular weight of 15,168.01 Da, and its N-terminal amino acid sequence was MGLTGAQIDAIK. rUuHb-F-I exhibited different antimicrobial activities against microorganisms. The lowest minimum inhibitory concentration against Micrococcus luteus was 2.78-4.63 μM. Our results may help elucidate the immune defense mechanism of U. unicinctus and may provide insights into new AMPs in drug discovery.

journal_name

Biomed Res Int

authors

Niu R,Chen X

doi

10.1155/2016/5683026

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

5683026

eissn

2314-6133

issn

2314-6141

journal_volume

2016

pub_type

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