2VBP

Isopenicillin N synthase with substrate analogue L,L,L-ACAB (unexposed)

Summary for 2VBP

• Entry DOI: 10.2210/pdb2vbp/pdb
• Related: 1BK0 1BLZ 1HB1 1HB2 1HB3 1HB4 1IPS 1OBN 1OC1 1ODM 1ODN 1QIQ 1QJE 1QJF 1UZW 1W03 1W04 1W05 1W06 1W3V 1W3X 2BJS 2BU9 2IVI 2IVJ 2JB4 2VAU 2VBB 2VBD
• Descriptor: ISOPENICILLIN N SYNTHETASE, FE (II) ION, N^6^-[(1R)-2-{[(1S)-1-carboxypropyl]amino}-2-oxo-1-(sulfanylmethyl)ethyl]-6-oxo-L-lysine, ... (5 entities in total)
• Functional Keywords: oxidoreductase, antibiotic biosynthesis, penicillin biosynthesis, iron, oxygenase, vitamin c, metal-binding, monocyclic intermediate, b-lactam antibiotic
• Biological source: Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139) (Aspergillus nidulans)
• Total number of polymer chains: 1
• Total formula weight: 38257.27

Authors

Ge, W.,Clifton, I.J.,Adlington, R.M.,Baldwin, J.E.,Rutledge, P.J. (deposition date: 2007-09-14, release date: 2008-11-04, Last modification date: 2024-05-08)

Primary citation

Ge, W.,Clifton, I.J.,Stok, J.E.,Adlington, R.M.,Baldwin, J.E.,Rutledge, P.J.
Crystallographic Studies on the Binding of Selectively Deuterated Lld- and Lll-Substrate Epimers by Isopenicillin N Synthase.
Biochem.Biophys.Res.Commun., 398:659-, 2010

PubMed Abstract: Isopenicillin N synthase (IPNS) is a non-heme iron(II) oxidase which catalyses the biosynthesis of isopenicillin N (IPN) from the tripeptide delta-l-alpha-aminoadipoyl-l-cysteinyl-d-valine (lld-ACV). Herein we report crystallographic studies to investigate the binding of a truncated lll-substrate in the active site of IPNS. Two epimeric tripeptides have been prepared by solution phase peptide synthesis and crystallised with the enzyme. delta-l-alpha-Aminoadipoyl-l-cysteinyl-d-2-amino-3,3-dideuteriobutyrate (lld-ACd(2)Ab) has the same configuration as the natural substrate lld-ACV at each of its three stereocentres; its epimer delta-l-alpha-aminoadipoyl-l-cysteinyl-l-2-amino-3,3-dideuteriobutyrate (lll-ACd(2)Ab) has the opposite configuration at its third amino acid. lll-ACV has previously been shown to inhibit IPNS turnover of its substrate lld-ACV; the all-protiated tripeptide delta-l-alpha-aminoadipoyl-l-cysteinyl-d-2-aminobutyrate (lld-ACAb) is a substrate for IPNS, being turned over to a mixture of penam and cepham products. Comparisons between the crystal structures of the IPNS:Fe(II):lld-ACd(2)Ab and IPNS:Fe(II):lll-ACd(2)Ab complexes offer a possible rationale for the previously observed inhibitory effects of lll-ACV on IPNS activity.

PubMed: 20603104
DOI: 10.1016/J.BBRC.2010.06.129

Experimental method

X-RAY DIFFRACTION (1.5 Å)