3k2b

Publication Abstract from PubMed

The crystal structure of the A(4) isoform of photosynthetic glyceraldehyde-3-phosphate dehydrogenase (GAPDH) from Arabidopsis thaliana, expressed in recombinant form and complexed with NAD, is reported. The crystals, which were grown in 2.4 M ammonium sulfate and 0.1 M sodium citrate, belonged to space group I222. The asymmetric unit includes ten subunits, i.e. two independent tetramers plus a dimer that generates a third tetramer by a crystallographic symmetry operation. The crystal structure was solved by molecular replacement and refined to an R factor of 23.7% and an R(free) factor of 28.9% at 2.6 A resolution. In the final model, each subunit binds one NAD(+) molecule and two sulfates, which occupy the P(s) and the P(i) anion-binding sites. Detailed knowledge of this structure is instrumental for structural investigation of supramolecular complexes of A(4)-GAPDH, phosphoribulokinase and CP12, which are involved in the regulation of photosynthesis in the model plant A. thaliana.

Structure of photosynthetic glyceraldehyde-3-phosphate dehydrogenase (isoform A4) from Arabidopsis thaliana in complex with NAD.,Fermani S, Sparla F, Marri L, Thumiger A, Pupillo P, Falini G, Trost P Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010 Jun 1;66(Pt 6):621-6. Epub, 2010 May 25. PMID:20516587^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.