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The soluble expression of the human renin binding protein using fusion partners: A comparison of ubiquitin, thioredoxin, maltose binding protein and NusA

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human renin binding protein (hRnBp), showingN-acetylglucosamine-2-epimerase activity, was over-expressed inE. coli, but was mainly present as an inclusion body. To improve its solubility and activity, ubiquitin (Ub), thioredoxin (Trx), maltose binding protein (MBP) and NusA, were used as fusion partners. The comparative solubilities of the fusion proteins were, from most to least soluble: NusA, MBP, Trx, Ub. Only the MBP fusion did not significantly reduce the activity of hRnBp, but enhanced the stability. The Origami (DE3), permitting a more oxidative environment for the cytoplasm inE. coli, helped to increase its functional activity.

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Correspondence to Byung-Gee Kim.

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Lee, C., Lee, S., Takahashi, S. et al. The soluble expression of the human renin binding protein using fusion partners: A comparison of ubiquitin, thioredoxin, maltose binding protein and NusA. Biotechnol Bioproc E 8, 89–93 (2003). https://doi.org/10.1007/BF02940262

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  • human renin binding protein
  • N-acetylglucosamine-2-epimerase
  • fusion protein
  • soluble expression