ISDA

Deposition Date 2001-08-07

Release Date 2003-01-14

Last Version Date 2024-03-13

Entry Detail

PDB ID:

1JQN

Keywords:

LYASE

Title:

Crystal structure of E.coli phosphoenolpyruvate carboxylase in complex with Mn2+ and DCDP

Biological Source:

Source Organism:

Escherichia coli (Taxon ID: 562)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.35 Å

R-Value Free:

0.23

R-Value Work:

0.19

Space Group:

I 2 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:phosphoenolpyruvate carboxylase
Gene (Uniprot):ppc
Chain IDs:A
Chain Length:883
Number of Molecules:1
Biological Source:Escherichia coli

UniProt ID:P00864 Pfam ID:PF00311 EC:4.1.1.31

Ligand Molecules

ASP

DCO

Primary Citation

Crystal structures of C4 form maize and quaternary complex of E. coli phosphoenolpyruvate carboxylases.

Matsumura, H, Xie, Y, Shirakata, S, Inoue, T, Yoshinaga, T, Ueno, Y, Izui, K, Kai, Y, Matsumura, H, Terada, M, Shirakata, S, Inoue, T, Yoshinaga, T, Izui, K, Kai, Y, Kai, Y, Matsumura, H, Inoue, T, Terada, K, Nagara, Y, Yoshinaga, T, Kihara, A, Tsumura, K, Izui, K, Matsumura, H, Nagata, T, Terada, M, Shirakata, S, Inoue, T, Yoshinaga, T, Ueno, Y, Saze, H, Izui, K, Kai, Y.Show

Structure 10 1721 1730 (2002)

PMID: 12467579 DOI: 10.1016/S0969-2126(02)00913-9

Abstact

Phosphoenolpyruvate carboxylase (PEPC) catalyzes the first step in the fixation of atmospheric CO(2) during C(4) photosynthesis. The crystal structure of C(4) form maize PEPC (ZmPEPC), the first structure of the plant PEPCs, has been determined at 3.0 A resolution. The structure includes a sulfate ion at the plausible binding site of an allosteric activator, glucose 6-phosphate. The crystal structure of E. coli PEPC (EcPEPC) complexed with Mn(2+), phosphoenolpyruvate analog (3,3-dichloro-2-dihydroxyphosphinoylmethyl-2-propenoate), and an allosteric inhibitor, aspartate, has also been determined at 2.35 A resolution. Dynamic movements were found in the ZmPEPC structure, compared with the EcPEPC structure, around two loops near the active site. On the basis of these molecular structures, the mechanisms for the carboxylation reaction and for the allosteric regulation of PEPC are proposed.

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