1o5x

Plasmodium falciparum TIM complexed to 2-phosphoglycerate

spinqualitylabelsall models 1o5x, resolution 1.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1o5x is a 2 chain structure with sequence from Plasmodium falciparum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.1Å Ligands: 2PG, 3PY, PO3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TPIS_PLAFA 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 Triose-phosphate isomerase, a key enzyme of the glycolytic pathway, catalyzes the isomerization of dihydroxy acetone phosphate and glyceraldehyde 3-phosphate. In this communication we report the crystal structure of Plasmodium falciparum triose-phosphate isomerase complexed to the inhibitor 2-phosphoglycerate at 1.1-A resolution. The crystallographic asymmetric unit contains a dimeric molecule. The inhibitor bound to one of the subunits in which the flexible catalytic loop 6 is in the open conformation has been cleaved into two fragments presumably due to radiation damage. The cleavage products have been tentatively identified as 2-oxoglycerate and meta-phosphate. The intact 2-phosphoglycerate bound to the active site of the other subunit has been observed in two different orientations. The active site loop in this subunit is in both open and "closed" conformations, although the open form is predominant. Concomitant with the loop closure, Phe-96, Leu-167, and residues 208-211 (YGGS) are also observed in dual conformations in the B-subunit. Detailed comparison of the active-site geometry in the present case to the Saccharomyces cerevisiae triose-phosphate isomerase-dihydroxy acetone phosphate and Leishmania mexicana triose-phosphate isomerase-phosphoglycolate complexes, which have also been determined at atomic resolution, shows that certain interactions are common to the three structures, although 2-phosphoglycerate is neither a substrate nor a transition state analogue. Structure of Plasmodium falciparum triose-phosphate isomerase-2-phosphoglycerate complex at 1.1-A resolution.,Parthasarathy S, Eaazhisai K, Balaram H, Balaram P, Murthy MR J Biol Chem. 2003 Dec 26;278(52):52461-70. Epub 2003 Oct 16. PMID:14563846 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Triose phosphate isomerase 3D structures

Proteopedia Page Contributors and Editors (what is this?)

OCA