Identification and characterisation of the novel endogenous promoter HASP1 and its signal peptide from Phaeodactylum tricornutum

Title
Identification and characterisation of the novel endogenous promoter HASP1 and its signal peptide from Phaeodactylum tricornutum
Authors
판철호에르덴돌고르 에르덴-오치르Bok-Kyu ShinByeori KwonChoonkyun Jung
Keywords
HASP1; promoter; signal peptide; Phaeodactylum tricornutum
Issue Date
2019-07
Publisher
Scientific Reports
Citation
VOL 9-10
Abstract
Although diatoms have been extensively studied as bioreactors, only a limited number of efficient gene promoters are available. Therefore, the development of new endogenous promoters is important for the heterologous production of a variety of recombinant proteins. Herein, we identified the most abundant secreted protein in Phaeodactylum tricornutum, designated ‘highly abundant secreted protein 1’ (HASP1), and characterised the activities of its promoter and signal peptide using green fluorescent protein (GFP) as a reporter. The HASP1 promoter strongly drove GFP expression during all growth phases of P. tricornutum in culture, in contrast to the commonly used fcpA promoter, which is less active during the stationary phase. The HASP1 signal peptide was also sufficient for facilitating efficient secretion of GFP by P. tricornutum. Our findings suggest that both the promoter and the signal peptide of HASP1 can be utilized as novel tools for the overexpression and secretion of recombinant proteins in P. tricornutum.
URI
http://pubs.kist.re.kr/handle/201004/69603
ISSN
2045-2322
Appears in Collections:
KIST Publication > Article
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