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Pàgina inicial > Articles > Articles publicats > A Streptomyces lividans SipY defficient strain as a host for protein production : |
Data: | 2017 |
Resum: | Background: Extracellular protein production by Gram-positive bacteria, such as Streptomyces, may be complementary to current established protein production processes. The performance of a Streptomyces lividans mutant strain, deficient in the major signal peptidase (SipY) is investigated for the production of proteins secreted via the secondary Tat pathway. - Results: The SipY deficient strain has shown advantages over the wild type strain, in terms of extracellular productivity, specific activity and rheological behaviour. Two operational modes, batch and fed-batch, have been studied using mannitol as carbon source. The results showed that two successive mannitol additions in fed-batch mode led to improved secretory protein production using Streptomyces agarase as a model protein. This production process was also explored for the Tat secretory protein S. lividans laccase. The predicted sequence for the pre-laccase coding sequence has been cloned into the mutant strain under the control of the agarase promoter. Batch and fed-batch laccase production, using either mannitol or glucose as carbon source, have been developed and quantified. - Conclusions: The usefulness of a Streptomyces lividans SipY deficient strain as protein producer has been demonstrated. A proposed operating mode with substrate additions has been employed for the optimisation of Tat proteins production, although some adjustments might be necessary depending on the secretory protein. |
Ajuts: | Ministerio de Economía y Competitividad TQ2011-28398-CO2-01 Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-452 |
Nota: | Altres ajuts: MAGRAMA/EGO22008 |
Nota: | Altres ajuts: MAGRAMA/PIE201220E003 |
Drets: | Tots els drets reservats. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió acceptada per publicar |
Matèria: | Streptomyces lividans ; Heterologous protein production ; Agarase ; SipY mutant strain |
Publicat a: | Journal of chemical technology and biotechnology, Vol. 92, isue 1 (Jan. 2017) , ISSN 1097-4660 |
Post-print 16 p, 1.5 MB |