1E3T image
Deposition Date 2000-06-22
Release Date 2000-10-03
Last Version Date 2024-05-15
Entry Detail
PDB ID:
1E3T
Title:
Solution Structure of the NADP(H) binding Component (dIII) of Proton-Translocating Transhydrogenase from Rhodospirillum rubrum
Biological Source:
Source Organism:
Host Organism:
Method Details:
Experimental Method:
Conformers Calculated:
100
Conformers Submitted:
1
Selection Criteria:
AVERAGE OF 10 LOWEST ENERGY STRUCTURES
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:NICOTINAMIDE NUCLEOTIDE TRANSHYDROGENASE (SUBUNIT BETA)
Chain IDs:A
Chain Length:203
Number of Molecules:1
Biological Source:RHODOSPIRILLUM RUBRUM
Ligand Molecules
Primary Citation
Solution Structure of the Nadp(H)-Binding Component (Diii) of Proton-Translocating Transhydrogenase from Rhodospirillum Rubrum
Biochim.Biophys.Acta 1459 248 ? (2000)
PMID: 11004437 DOI: 10.1016/S0005-2728(00)00159-6

Abstact

Transhydrogenase is a proton pump found in the membranes of bacteria and animal mitochondria. The solution structure of the expressed, 21.5 kDa, NADP(H)-binding component (dIII) of transhydrogenase from Rhodospirillum rubrum has been solved by NMR methods. This is the first description of the structure of dIII from a bacterial source. The protein adopts a Rossmann fold: an open, twisted, parallel beta-sheet, flanked by helices. However, the binding of NADP(+) to dIII is profoundly different to that seen in other Rossmann structures, in that its orientation is reversed: the adenosine moiety interacts with the first betaalphabetaalphabeta motif, and the nicotinamide with the second. Features in the structure that might be responsible for changes in nucleotide-binding affinity during catalysis, and for interaction with other components of the enzyme, are identified. The results are compared with the recently determined, high-resolution crystal structures of human and bovine dIII which also show the reversed nucleotide orientation.

Legend

Protein

Chemical

Disease

Primary Citation of related structures