Lanthionine introduction into nukacin ISK-1 prepeptide by co-expression with modification enzyme NukM in Escherichia coli.

Abstract:

:We demonstrated lanthionine introduction into hexa-histidine-tagged (His-tagged) nukacin ISK-1 prepeptide NukA by modification enzyme NukM in Escherichia coli. Co-expression of nukA and nukM, purification of the resulting His-tagged prepeptide by affinity chromatography, and subsequent mass spectrometry analysis showed that the prepeptide was converted into a postulated peptide with decrease in mass of 72Da which resulted from dehydration of four amino acids. Characterization of the resultant prepeptide indicated the presence of unusual amino acids, such as dehydrated amino acid, lanthionine or 3-methyllanthionine, in its C-terminal propeptide moiety. The modified prepeptide encompassing the leader peptide attached to the post-translationally modified propeptide moiety was readily obtained by one-step purification. Our findings will thus be a powerful tool for introducing unusual amino acids aimed at peptide engineering and also helpful to provide new insight for further understanding of lanthionine-forming enzymes for lantibiotics.

authors

Nagao J,Harada Y,Shioya K,Aso Y,Zendo T,Nakayama J,Sonomoto K

doi

10.1016/j.bbrc.2005.08.125

subject

Has Abstract

pub_date

2005-10-21 00:00:00

pages

507-13

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)01839-5

journal_volume

336

pub_type

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