A versatile modular vector set for optimizing protein expression among bacterial, yeast, insect and mammalian hosts

Autoři: Márk Somogyi aff001;  Tamás Szimler aff001;  Attila Baksa aff001;  Barbara M. Végh aff001;  Tamás Bakos aff001;  Katalin Paréj aff001;  Csaba Ádám aff001;  Áron Zsigmond aff001;  Márton Megyeri aff001;  Beáta Flachner aff001;  Ráchel Sajó aff001;  Éva Gráczer aff001;  Péter Závodszky aff001;  István Hajdú aff001;  László Beinrohr aff001
Působiště autorů: Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Pázmány Péter sétány, Budapest, Hungary aff001
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0227110


We have developed a unified, versatile vector set for expression of recombinant proteins, fit for use in any bacterial, yeast, insect or mammalian cell host. The advantage of this system is its versatility at the vector level, achieved by the introduction of a novel expression cassette. This cassette contains a unified multi-cloning site, affinity tags, protease cleavable linkers, an optional secretion signal, and common restriction endonuclease sites at key positions. This way, genes of interest and all elements of the cassette can be switched freely among the vectors, using restriction digestion and ligation without the need of polymerase chain reaction (PCR). This vector set allows rapid protein expression screening of various hosts and affinity tags. The reason behind this approach was that it is difficult to predict which expression host and which affinity tag will lead to functional expression. The new system is based on four optimized and frequently used expression systems (Escherichia coli pET, the yeast Pichia pastoris, pVL and pIEx for Spodoptera frugiperda insect cells and pLEXm based mammalian systems), which were modified as described above. The resulting vector set was named pONE series. We have successfully applied the pONE vector set for expression of the following human proteins: the tumour suppressor RASSF1A and the protein kinases Aurora A and LIMK1. Finally, we used it to express the large multidomain protein, Rho-associated protein kinase 2 (ROCK2, 164 kDa) and demonstrated that the yeast Pichia pastoris reproducibly expresses the large ROCK2 kinase with identical activity to the insect cell produced counterpart. To our knowledge this is among the largest proteins ever expressed in yeast. This demonstrates that the cost-effective yeast system can match and replace the industry-standard insect cell expression system even for large and complex mammalian proteins. These experiments demonstrate the applicability of our pONE vector set.

Klíčová slova:

Insect vectors – Proteases – Protein expression – Protein kinases – Recombinant proteins – Secretion – Yeast – Pichia pastoris


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2019 Číslo 12
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