2AG8

NADP complex of Pyrroline-5-carboxylate reductase from Neisseria meningitidis

Summary for 2AG8

• Entry DOI: 10.2210/pdb2ag8/pdb
• Related: 1YQG
• Descriptor: pyrroline-5-carboxylate reductase, NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE (3 entities in total)
• Functional Keywords: structural genomics, pyrroline-5-carboxylate reductase, psi, protein structure initiative, midwest center for structural genomics, mcsg, oxidoreductase
• Biological source: Neisseria meningitidis
• Total number of polymer chains: 1
• Total formula weight: 29542.84

Authors

Chang, C.,Li, H.,Collart, F.,Joachimiak, A.,Midwest Center for Structural Genomics (MCSG) (deposition date: 2005-07-26, release date: 2005-09-06, Last modification date: 2024-10-09)

Primary citation

Nocek, B.,Chang, C.,Li, H.,Lezondra, L.,Holzle, D.,Collart, F.,Joachimiak, A.
Crystal Structures of Delta(1)-Pyrroline-5-carboxylate Reductase from Human Pathogens Neisseria meningitides and Streptococcus pyogenes.
J.Mol.Biol., 354:91-106, 2005

PubMed Abstract: L-proline is an amino acid that plays an important role in proteins uniquely contributing to protein folding, structure, and stability, and this amino acid serves as a sequence-recognition motif. Proline biosynthesis can occur via two pathways, one from glutamate and the other from arginine. In both pathways, the last step of biosynthesis, the conversion of delta1-pyrroline-5-carboxylate (P5C) to L-proline, is catalyzed by delta1-pyrroline-5-carboxylate reductase (P5CR) using NAD(P)H as a cofactor. We have determined the first crystal structure of P5CR from two human pathogens, Neisseria meningitides and Streptococcus pyogenes, at 2.0 angstroms and 2.15 angstroms resolution, respectively. The catalytic unit of P5CR is a dimer composed of two domains, but the biological unit seems to be species-specific. The N-terminal domain of P5CR is an alpha/beta/alpha sandwich, a Rossmann fold. The C-terminal dimerization domain is rich in alpha-helices and shows domain swapping. Comparison of the native structure of P5CR to structures complexed with L-proline and NADP+ in two quite different primary sequence backgrounds provides unique information about key functional features: the active site and the catalytic mechanism. The inhibitory L-proline has been observed in the crystal structure.

PubMed: 16233902
DOI: 10.1016/j.jmb.2005.08.036

Experimental method

X-RAY DIFFRACTION (2.1 Å)