ISDA

Deposition Date 1999-01-22

Release Date 1999-10-08

Last Version Date 2024-10-30

Entry Detail

PDB ID:

1B7G

Keywords:

OXIDOREDUCTASE

Title:

GLYCERALDEHYDE 3-PHOSPHATE DEHYDROGENASE

Biological Source:

Source Organism:

Sulfolobus solfataricus (Taxon ID: 2287)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.05 Å

R-Value Free:

0.29

R-Value Work:

0.22

Space Group:

P 41 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:PROTEIN (GLYCERALDEHYDE 3-PHOSPHATE DEHYDROGENASE)
Gene (Uniprot):gap
Mutations:YES
Chain IDs:A (auth: O), B (auth: Q)
Chain Length:340
Number of Molecules:2
Biological Source:Sulfolobus solfataricus

UniProt ID:P39460 Pfam ID:PF01113, PF02800 EC:1.2.1.12

Ligand Molecules

SO4

Primary Citation

Crystal structure of the glyceraldehyde-3-phosphate dehydrogenase from the hyperthermophilic archaeon Sulfolobus solfataricus.

Isupov, M.N, Fleming, T.M, Dalby, A.R, Crowhurst, G.S, Bourne, P.C, Littlechild, J.A, Fleming, T.M, Jones, C.E, Piper, P.W, Cowan, D.A, Isupov, M.N, Littlechild, J.A.Show

J.Mol.Biol. 291 651 660 (1999)

PMID: 10448043 DOI: 10.1006/jmbi.1999.3003

Abstact

The enzyme glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from the archaea shows low sequence identity (16-20%) with its eubacterial and eukaryotic counterparts. The crystal structure of the apo GAPDH from Sulfolobus solfataricus has been determined by multiple isomorphous replacement at 2.05 A resolution. The enzyme has several differences in secondary structure when compared with eubacterial GAPDHs, with an overall increase in the number of alpha-helices. There is a relocation of the active-site residues within the catalytic domain of the enzyme. The thermostability of the S. solfataricus enzyme can be attributed to a combination of an ion pair cluster and an intrasubunit disulphide bond.

Legend

Protein

Chemical

Disease

Primary Citation of related structures