Primary Citation of Related Structures: 2ER0, 2ER9
PubMed Abstract:
The conformation of a statine-containing renin inhibitor complexed with the aspartic proteinase from the fungus Endothia parasitica (EC 3.4.23.6) has been determined by X-ray diffraction at 2.2-A resolution (R = 0.17). We describe the structure of the complex at high resolution and compare this with a 3 ...
The conformation of a statine-containing renin inhibitor complexed with the aspartic proteinase from the fungus Endothia parasitica (EC 3.4.23.6) has been determined by X-ray diffraction at 2.2-A resolution (R = 0.17). We describe the structure of the complex at high resolution and compare this with a 3.0-A resolution analysis of a bound inhibitor, L-364,099, containing a cyclohexylalanine analogue of statine. The inhibitors bind in extended conformations in the long active-site cleft, and the hydroxyl of the transition-state analogue, statine, interacts strongly with the catalytic aspartates via hydrogen bonds to the essential carboxyl groups. This work provides a detailed structural analysis of the role of statine in peptide inhibitors. It shows conclusively that statine should be considered a dipeptide analogue (occupying P1 to P1') despite lacking the equivalent of a P1' side chain, although other inhibitor residues (especially P2) may compensate by interacting at the unoccupied S1' specificity subsite.
Related Citations:
The Active Site of Aspartic Proteinases Pearl, L., Blundell, T. (1984) FEBS Lett 174: 96
Active Site of Acid Proteinases Blundell, T.L., Jones, H.B., Khan, G., Taylor, G., Sewell, T.S., Pearl, L.H., Wood, S.P. (1979) Proc Febs Meet 60: 281
The Three-Dimensional Structure of Acid Proteinases Blundell, T.L., Jenkins, J.A., Khan, G., Roychowdhury, P., Sewell, T., Tickle, I.J., Wood, E.A. (1979) Proc Febs Meet 52: 81
Four-Fold Structural Repeat in the Acid Proteases Blundell, T.L., Sewell, B.T., Mclachlan, A.D. (1979) Biochim Biophys Acta 580: 24
Structural Evidence for Gene Duplication in the Evolution of Acid Proteases Tang, J., James, M.N.G., Hsu, I.N., Jenkins, J.A., Blundell, T.L. (1978) Nature 271: 618
Homology Among Acid Proteases. Comparison of Crystal Structures at 3 Angstroms Resolution of Acid Proteases from Rhizopus Chinensis and Endothia Parasitica Subramanian, E., Swan, I.D.A., Liu, M., Davies, D.R., Jenkins, J.A., Tickle, I.J., Blundell, T.L. (1977) Proc Natl Acad Sci U S A 74: 556
X-Ray Analysis and Circular Dichroism of the Acid Protease from Endothia Parasitica and Chymosin Jenkins, J., Tickle, I., Sewell, T., Ungaretti, L., Wollmer, A., Blundell, T. (1977) Adv Exp Med Biol 95: 43
Organizational Affiliation:
Department of Crystallography, Birkbeck College, London, U.K.
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