5JBN: Crystal Structure Of Apo Phosphopantetheine Adenylyltransferase (ppat/coad) From E. Coli

The deuteration of proteins and selective labeling of side chain methyl groups has greatly enhanced the molecular weight range of proteins and protein complexes which can be studied using solution NMR spectroscopy. Protocols for the selective labeling of all six methyl group containing amino acids individually are available, however to date, only a maximum of five amino acids have been labeled simultaneously. Here, we describe a new methodology for the simultaneous, selective labeling of all six methyl containing amino acids using the 115 kDa homohexameric enzyme CoaD from E. coli as a model system. The utility of the labeling protocol is demonstrated by efficiently and unambiguously assigning all methyl groups in the enzymatic active site using a single 4D (13)C-resolved HMQC-NOESY-HMQC experiment, in conjunction with a crystal structure. Furthermore, the six fold labeled protein was employed to characterize the interaction between the substrate analogue (R)-pantetheine and CoaD by chemical shift perturbations, demonstrating the benefit of the increased probe density.
PDB ID: 5JBNDownload
MMDB ID: 139627
PDB Deposition Date: 2016/4/13
Updated in MMDB: 2016/08
Experimental Method:
x-ray diffraction
Resolution: 1.45  Å
Source Organism:
Similar Structures:
Biological Unit for 5JBN: hexameric; determined by author and by software (PISA)
Molecular Components in 5JBN
Label Count Molecule
Proteins (6 molecules)
Phosphopantetheine Adenylyltransferase(Gene symbol: coaD)
Molecule annotation
Chemicals (21 molecules)
* Click molecule labels to explore molecular sequence information.

Citing MMDB