Author: Piccone, Maria E.; Sira, Serge; Zellner, Marla; Grubman, Marvin J.
Title: Expression in Escherichia coli and purification of biologically active L proteinase of foot-and-mouth disease virus Cord-id: xkakf926 Document date: 2000_2_23
ID: xkakf926
Snippet: The foot-and-mouth disease virus (FMDV) Lb gene was cloned into bacterial expression vectors under the control of a T7 RNA polymerase promoter. The Lb protein was expressed in both an in vitro transcription-translation system and in Escherichia coli. In vitro expression of a construct containing the Lb gene fused to a portion of the VP4 and 3D genes demonstrated cis cleavage activity that could be blocked by the thiol protease inhibitor E-64. Lb expressed in E. coli was purified from the soluble
Document: The foot-and-mouth disease virus (FMDV) Lb gene was cloned into bacterial expression vectors under the control of a T7 RNA polymerase promoter. The Lb protein was expressed in both an in vitro transcription-translation system and in Escherichia coli. In vitro expression of a construct containing the Lb gene fused to a portion of the VP4 and 3D genes demonstrated cis cleavage activity that could be blocked by the thiol protease inhibitor E-64. Lb expressed in E. coli was purified from the soluble fraction by metal chelation chromatography. Purified Lb had trans cleavage activity at the L/P1 junction and cleaved the p220 component of the cap-binding protein complex.
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