Trigger factor lacking the PPIase domain can enhance the folding of eukaryotic multi-domain proteins in Escherichia coli.
Recombinant expression of eukaryotic proteins in bacteria often results in misfolding and aggregation. The ribosome-binding Trigger factor (TF) is the first molecular chaperone that interacts with nascent polypeptide chains in bacteria. Here we show that mutant TF lacking the PPIase domain (TFNC) is more efficient than wild-type TF in enhancing the folding yield of multi-domain proteins such as firefly luciferase. We find that TFNC has a shorter residence time on nascent chains, thus facilitating co-translational folding. By delaying folding relative to translation, the PPIase domain may increase the propensity of misfolding for certain eukaryotic proteins that rely on a mechanism of co-translational, domain-wise folding.
Gupta
Rashmi
R
Department of Cellular Biochemistry, Max-Planck Institute of Biochemistry, Am Klopferspitz 18, D-82152 Martinsried, Germany.
Lakshmipathy
Sathish Kumar
SK
Chang
Hung-Chun
HC
Etchells
Stephanie A
SA
Hartl
F Ulrich
FU
D000818:Animals; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D029968:Escherichia coli Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D049409:Luciferases, Firefly / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D008958:Models, Molecular; D018832:Molecular Chaperones / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D009154:Mutation; D019696:Peptidylprolyl Isomerase / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D014176:Protein Biosynthesis; D017510:Protein Folding; D017434:Protein Structure, Tertiary; D011994:Recombinant Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017384:Sequence Deletion; D013762:Tetrahydrofolate Dehydrogenase / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D018631:ras Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism
D029968:Escherichia coli Proteins; D018832:Molecular Chaperones; D011994:Recombinant Proteins; D049409:Luciferases, Firefly; D013762:Tetrahydrofolate Dehydrogenase; D018631:ras Proteins; C403324:trigger factor, E coli; D019696:Peptidylprolyl Isomerase