1typ

SUBSTRATE INTERACTIONS BETWEEN TRYPANOTHIONE REDUCTASE AND N1-GLUTATHIONYLSPERMIDINE DISULPHIDE AT 0.28-NM RESOLUTION

spinqualitylabelsall models 1typ, resolution 2.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1typ is a 2 chain structure with sequence from Crifa. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FAD, GSH, NAP, SPD Activity: Trypanothione-disulfide reductase, with EC number 1.8.1.12 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [TYTR_CRIFA] Trypanothione is the parasite analog of glutathione; this enzyme is the equivalent of glutathione reductase. 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 The enzyme trypanothione reductase has been identified as a prime target for the rational design of inhibitors which may have clinical use in the treatment of tropical diseases caused by the genera Trypanosoma and Leishmania. To aid the design or identification of new inhibitors of this enzyme we have elucidated the structural detail of a trypanothione reductase complexed with one of the naturally occurring substrates, N1-glutathionylspermidine disulphide, by single-crystal X-ray diffraction methods at 0.28-nm resolution. The model for the Crithidia fasciculata enzyme-substrate complex has an R-factor of 14.8% and root-mean-square deviations of 0.0015 nm and 3.3 degrees on bond lengths and angles respectively. Hydrogen bonding and van der Waals interactions between the enzyme and substrate are dominated by the amino acid side chains. The substrate binds in a rigid active site such that one glutathione moiety is in a V-shape, the other in an extended conformation. One spermidine moiety binds closely to a hydrophobic patch in the active site formed by a tryptophan and a methionine. Distances between the methionine S delta and the terminal N of this spermidine suggest that a hydrogen bond may supplement the hydrophobic interactions in this part of the active site. Substrate interactions between trypanothione reductase and N1-glutathionylspermidine disulphide at 0.28-nm resolution.,Bailey S, Smith K, Fairlamb AH, Hunter WN Eur J Biochem. 1993 Apr 1;213(1):67-75. PMID:8477734 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Trypanothione reductase

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