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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Hosur, M. V. Gulnik, S. Collins, J. Baldwin, E. T. Sowder, R. C. Silva, A. M. Bhat, T. N. Cachau, R. E. Erickson, J. W. |
| Description | Author Affiliation: Baldwin ET ( Structural Biochemistry Program, Program Resources Inc./DynCorp, National Cancer Institute-Frederick Cancer Research and Development Center, MD 21702.); |
| Abstract | Cathepsin D (EC 3.4.23.5) is a lysosomal protease suspected to play important roles in protein catabolism, antigen processing, degenerative diseases, and breast cancer progression. Determination of the crystal structures of cathepsin D and a complex with pepstatin at 2.5 A resolution provides insights into inhibitor binding and lysosomal targeting for this two-chain, N-glycosylated aspartic protease. Comparison with the structures of a complex of pepstatin bound to rhizopuspepsin and with a human renin-inhibitor complex revealed differences in subsite structures and inhibitor-enzyme interactions that are consistent with affinity differences and structure-activity relationships and suggest strategies for fine-tuning the specificity of cathepsin D inhibitors. Mutagenesis studies have identified a phosphotransferase recognition region that is required for oligosaccharide phosphorylation but is 32 A distant from the N-domain glycosylation site at Asn-70. Electron density for the crystal structure of cathepsin D indicated the presence of an N-linked oligosaccharide that extends from Asn-70 toward Lys-203, which is a key component of the phosphotransferase recognition region, and thus provides a structural explanation for how the phosphotransferase can recognize apparently distant sites on the protein surface. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 14 |
| Volume Number | 90 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1993-08-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cathepsin D Antagonists & Inhibitors Chemistry Pepstatins Amino Acid Sequence Aspartic Acid Endopeptidases Biological Transport Drug Design Glycosylation Lysosomes Models, Molecular Molecular Sequence Data Phosphotransferases Protein Conformation Renin X-Ray Diffraction Comparative Study Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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