| Type: | Domain | Name: | Trigger factor, C-terminal |
| Description: | In the Escherichia colicytosol, a fraction of the newly synthesised proteins requires the activity of molecular chaperones for folding to the native state. The major chaperones implicated in this folding process are the ribosome-associated Trigger Factor (TF), and the DnaK and GroEL chaperones with their respective co-chaperones. Trigger Factor is an ATP-independent chaperone and displays chaperone and peptidyl-prolyl-cis-trans-isomerase (PPIase) activities in vitro. It is composed of at least three domains, an N-terminal domain which mediates association with the large ribosomal subunit, a central substrate binding and PPIase domain with homology to FKBP proteins, and a C-terminal domain of unknown function. The positioning of TF at the peptide exit channel, together with its ability to interact with nascent chains as short as 57 residues renders TF a prime candidate for being the first chaperone that binds to the nascent polypeptide chains [].This entry represents the C-terminal domain of bacterial trigger factor proteins, which has a multi-helical structure consisting of an irregular array of long and short helices. This domain is structurally similar to the peptide-binding domain of the bacterial porin chaperone SurA. | Short Name: | Trigger_fac_C |
