Expression, refolding, and purification of a truncated human Delta-like1, a ligand of Notch receptors.
Protein Expr Purif
; 59(2): 242-8, 2008 Jun.
Article
em En
| MEDLINE
| ID: mdl-18367408
ABSTRACT
The Notch signaling pathway plays a pivotal role in proliferation, apoptosis, and cell fate specification in both embryonic and postnatal development, and is a potential therapeutic target for human diseases such as cancer. To express in Escherichia coli and purify soluble fragment of human Delta-like1 (hDll1), we cloned two extracellular fragments of hDll1 [hDll1 (127-225) and hDll1 (26-225)]. The hDll1 (127-225) fragment was successfully expressed in E. coli as a GST fusion protein (GST-hDll1). The GST-hDll1 protein, which was expressed as inclusion bodies after induction by IPTG, was refolded and purified simultaneously using affinity chromatography and size exclusion chromatography. The purified GST-hDll1 was of more than 95% purity, and had a molecular weight of 39kDa. Reporter assay showed that GST-hDll1 could activate a reporter gene that is dependent on Notch activation. Therefore, using the E. coli expression system and different chromatography systems, we successfully expressed, refolded, and purified a biologically active GST-hDll1, which might be potentially useful for therapy and studying the Notch pathway.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Proteínas Recombinantes de Fusão
/
Peptídeos e Proteínas de Sinalização Intercelular
/
Proteínas de Membrana
Limite:
Humans
Idioma:
En
Ano de publicação:
2008
Tipo de documento:
Article