2I5P
Crystal structure of glyceraldehyde-3-phosphate dehydrogenase isoform 1 from K. marxianus
Summary for 2I5P
| Entry DOI | 10.2210/pdb2i5p/pdb |
| Descriptor | Glyceraldehyde-3-phosphate dehydrogenase 1, alpha-D-glucopyranose, BETA-MERCAPTOETHANOL, ... (4 entities in total) |
| Functional Keywords | rossmann fold, apo form, dimer, gapdh, oxidoreductase |
| Biological source | Kluyveromyces marxianus |
| Total number of polymer chains | 2 |
| Total formula weight | 74232.55 |
| Authors | Ferreira-da-Silva, F.,Pereira, P.J.B.,Gales, L.,Moradas-Ferreira, P.,Damas, A.M. (deposition date: 2006-08-25, release date: 2006-09-12, Last modification date: 2023-08-30) |
| Primary citation | Ferreira-da-Silva, F.,Pereira, P.J.,Gales, L.,Roessle, M.,Svergun, D.I.,Moradas-Ferreira, P.,Damas, A.M. The Crystal and Solution Structures of Glyceraldehyde-3-phosphate Dehydrogenase Reveal Different Quaternary Structures. J.Biol.Chem., 281:33433-33440, 2006 Cited by PubMed Abstract: The presence of an isoform of glyceraldehyde-3-phosphate dehydrogenase (kmGAPDH1p) associated with the cell wall of a flocculent strain of Kluyveromyces marxianus was the first report of a non-cytosolic localization of a glycolytic enzyme, but the mechanism by which the protein is transported to the cell surface is not known. To identify structural features that could account for the multiple localizations of the protein, the three-dimensional structure of kmGAPDH1p was determined by x-ray crystallography and small angle x-ray scattering. The x-ray crystallographic structure of kmGAPDH1p revealed a dimer, although all GAPDH homologs studied thus far have a tetrameric structure with 222 symmetry. Interestingly, the structure of kmGAPDH1p in solution revealed a tetramer with a 70 degrees tilt angle between the dimers. Moreover, the separation between the centers of the dimers composing the kmGAPDH1p tetramer diminished from 34 to 30 A upon NAD(+) binding, this latter value being similar to the observed in the crystallographic models of GAPDH homologs. The less compact structure of apo-kmGAPDH1p could already be the first image of the transition intermediate between the tetramer observed in solution and the dimeric form found in the crystal structure, which we postulate to exist in vivo because of the protein's multiple subcellular localizations in this yeast species. PubMed: 16963457DOI: 10.1074/jbc.M605267200 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.3 Å) |
Structure validation
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