Tyrosine analogues as alternative substrates for protein tyrosine kinase Csk: Insights into substrate selectivity and catalytic mechanism
摘要:
Protein tyrosine kinases are critical enzymes in cell signal transduction but relatively little is known about the molecular recognition of the tyrosine substrate by these enzymes. Details of tyrosine substrate specificity within the context of a short peptide were investigated for protein tyrosine kinase Csk. It was found that aryl ring functional group substitutions the size of methyl group or smaller were generally well tolerated by the protein tyrosine kinase Csk whereas larger groups caused a decline in substrate efficiency. Extension of the phenol from the peptide backbone by a single methylene was acceptable for phosphorylation whereas removal of a methylene nearly abolished reactivity. Only the L-tyrosine derivative was processed. A negative charge ortho to the phenol hydroxyl was incompatible with substrate reactivity, consistent with previous pH rate profiles which indicated the importance of the neutral phenol. Overall, these studies confirmed the interpretation of a previous linear free energy relationship analysis which suggested that the enzyme followed a dissociative transition state mechanism. (C) 2000 Elsevier Science Ltd. All rights reserved.
C-terminal modified oxamyl dipeptides as inhibitors of the ICE-ced-3 family of cysteine proteases
申请人:——
公开号:US20020042376A1
公开(公告)日:2002-04-11
This invention is directed to novel oxamyl dipeptide ICE/ced-3 family inhibitor compounds. The invention is also directed to pharmaceutical compositions containing these compounds, as well as to the use of such compositions in the treatment of patients suffering inflammatory, autoimmune and neurodegenerative diseases, for the prevention of ischemic injury, and for the preservation of organs that are to undergo a transplantation procedure.
Amino acid derived prodrugs of propofol, compositions and uses thereof
申请人:Gallop A. Mark
公开号:US20050004381A1
公开(公告)日:2005-01-06
The present invention provides propofol prodrugs, methods of making propofol prodrugs, pharmaceutical compositions of propofol prodrugs and methods of using propofol prodrugs and pharmaceutical compositions thereof to treat or prevent diseases or disorders such as migraine headache pain and post-chemotherapy or post-operative surgery nausea and vomiting.
Inhibition of inflammation using interleukin-1beta-converting enzyme (ICE)/CED-3 family inhibitors
申请人:Idun Pharmaceuticals, Inc.
公开号:US20020123522A1
公开(公告)日:2002-09-05
The present invention provides methods for expanding and increasing survival of hematopoietic cell populations, for prolonging viability of an organ for transplantation, and enhancing bioproduction, using interleukin-1&bgr;-converting enzyme (ICE)/CED-3 family inhibitors. Exemplary compounds useful in the methods of the invention are provided herein.
TREATMENT OF INFECTIOUS DISEASE USING INTERLEUKIN-1BETA-CONVERTING ENZYME (ICE)/CED-3 FAMILY INHIBITORS
申请人:Idun Pharmaceuticals, Inc.
公开号:US20020128306A1
公开(公告)日:2002-09-12
The present invention provides methods and compositions for treating infectious disease or suppressing inflammation associated therewith or ameliorating symptoms thereof by the suppression of the activity of a member of the interleukin-1&bgr;-converting enzyme (ICE)/CED-3 family of proteases. Also provided are compositions useful for these purposes. Exemplary compounds useful in the methods of the invention are provided herein.
Methods, compositions and kits for preserving antigenicity
申请人:——
公开号:US20030039661A1
公开(公告)日:2003-02-27
The present invention relates generally to programmed cell death and specifically to methods, compositions, and kits for preserving or enhancing antigenicity of markers associated with disease by utilizing inhibitors of apoptosis including interleukin-1&bgr;-converting enzyme (ICE)/CED-3 family inhibitors.