1ok4

ARCHAEAL FRUCTOSE 1,6-BISPHOSPHATE ALDOLASE COVALENTLY BOUND TO THE SUBSTRATE DIHYDROXYACETONE PHOSPHATE

spinqualitylabelsall models 1ok4, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1ok4 is a 10 chain structure with sequence from Thermoproteus tenax. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: 13P Related: 1ojx, 1ok6 Activity: Fructose-bisphosphate aldolase, with EC number 4.1.2.13 Resources: FirstGlance, OCA, RCSB, PDBsum Function [ALF1_THETE] Catalyzes the reversible cleavage of fructose 1,6-bisphosphate (FBP) to glyceraldehyde 3-phosphate (GAP) and dihydroxyacetone phosphate (DHAP). Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Fructose-1,6-bisphosphate aldolase (FBPA) catalyzes the reversible cleavage of fructose 1,6-bisphosphate to glyceraldehyde 3-phosphate and dihydroxyacetone phosphate in the glycolytic pathway. FBPAs from archaeal organisms have recently been identified and characterized as a divergent family of proteins. Here, we report the first crystal structure of an archaeal FBPA at 1.9-A resolution. The structure of this 280-kDa protein complex was determined using single wavelength anomalous dispersion followed by 10-fold non-crystallographic symmetry averaging and refined to an R-factor of 14.9% (Rfree 17.9%). The protein forms a dimer of pentamers, consisting of subunits adopting the ubiquitous (betaalpha)8 barrel fold. Additionally, a crystal structure of the archaeal FBPA covalently bound to dihydroxyacetone phosphate was solved at 2.1-A resolution. Comparison of the active site residues with those of classical FBPAs, which share no significant sequence identity but display the same overall fold, reveals a common ancestry between these two families of FBPAs. Structural comparisons, furthermore, establish an evolutionary link to the triosephosphate isomerases, a superfamily hitherto considered independent from the superfamily of aldolases. Crystal structure of an archaeal class I aldolase and the evolution of (betaalpha)8 barrel proteins.,Lorentzen E, Pohl E, Zwart P, Stark A, Russell RB, Knura T, Hensel R, Siebers B J Biol Chem. 2003 Nov 21;278(47):47253-60. Epub 2003 Aug 26. PMID:12941964 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Aldolase

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