twin arginine translocation system in secretory expression of recombinant human growth hormone

Evaluation of Heat Induction Strategy for Recombinant Human Growth Hormone Expression in Fed-Batch Fermentation

CONSTRUCTION OF RECOMBINANT PLASMIDS FOR PERIPLASMIC EXPRESSION OF HUMAN GROWTH HORMONE IN ESCHERICHIA COLI UNDER T7 AND LAC PROMOTERS

In order to study the periplasmic expression of human growth hormone (hGH) in Escherichia coli, the related cDNA was inserted in two expression plasmids carrying pelB signal peptide, one with lac bacterial promoter and the other with a bacteriophage T7-based promoter. The recombinant plasmids were moved to TG1 and BL21 strains of E. coli, respectively. To induce the expression systems, IPTG and...

Twin-arginine translocation pathway in Streptomyces lividans.

The recently discovered bacterial twin-arginine translocation (Tat) pathway was investigated in Streptomyces lividans, a gram-positive organism with a high secretion capacity. The presence of one tatC and two hcf106 homologs in the S. lividans genome together with the several precursor proteins with a twin-arginine motif in their signal peptide suggested the presence of the twin-arginine transl...

Twin-arginine-dependent translocation of folded proteins.

Twin-arginine translocation (Tat) denotes a protein transport pathway in bacteria, archaea and plant chloroplasts, which is specific for precursor proteins harbouring a characteristic twin-arginine pair in their signal sequences. Many Tat substrates receive cofactors and fold prior to translocation. For a subset of them, proofreading chaperones coordinate maturation and membrane-targeting. Tat ...

P-152: Expression of Recombinant Human Luteinizing Hormone (hLH) in CHO Cells

Background: Human luteinizing hormone (hLH) stimulates steroid biosynthesis of the ovary, triggers ovulation and prepares androgen production of testicular Leydig cells. LH belongs to the family of glycoprotein hormones that are heterodimers consisting of a common α-subunit and specific β-subunit. hLH is necessary for clinical and infertility treatment. Recombinant DNA technology provides a use...

The Over-Expression of Biologically Active Human Growth Hormone in a T5-Based System in Escherichia coli, Studying Temperature Effect

We studied the expression of human growth hormone (hGH) in E. coli under a bacteriophage T5-base promoter in a pQE30 expression vector. For an efficient expression of hGH cDNA, a number of codons at the hGH N-terminal coding region were altered based on the E. coli major codons. An over-expression of hGH in the bacteria, carrying the recombinant plasmids, was observed at 37°C in the presence of...