Abstract
Trigger factor (TF) is a highly conserved multi-domain molecular chaperone in bacteria. It binds via its ribosome binding domain (RBD) to the ribosomal tunnel exit and facilitates co-translational folding of a broad range of protein substrates primarily through interactions with the substrate binding domain (SBD) adjacent to the RBD. Within the SBD, a peptidyl-prolyl cis-trans isomerase (PPIase) domain is inserted leading to an unusual domain insertion, which may provide stabilizing effect to the highly plastic SBD. Here we report the near complete NMR assignments of TF PPIase providing the basis for subsequent structural and folding in the context of the chaperone activity of TF.
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