A series of fluorobenzoylated di- and tripeptides as potential leads for the development of molecular probes for imaging of COX-2 expression was prepared according to standard Fmoc-based solid-phase peptide synthesis. All peptides were assessed for their COX-2 inhibitory potency and selectivity profile in a fluorescence-based COX binding assay. Within the series of 15 peptides tested, more ..
BioActive Compound: 1
Description:
Title: Synthesis and evaluation of fluorobenzoylated di- and tripeptides as inhibitors of cyclooxygenase-2 (COX-2).
Abstract: A series of fluorobenzoylated di- and tripeptides as potential leads for the development of molecular probes for imaging of COX-2 expression was prepared according to standard Fmoc-based solid-phase peptide synthesis. All peptides were assessed for their COX-2 inhibitory potency and selectivity profile in a fluorescence-based COX binding assay. Within the series of 15 peptides tested, cysteine-containing peptides numbered 7, 8, 11 and 12, respectively, were the most potent COX-2 inhibitors possessing IC(50) values ranging from 5 to 85 ##M. Fluorobenzoylated tripeptides 7 and 8 displayed some COX-2 selectivity (COX-2 selectivity index 2.1 and 1.6), whereas fluorobenzoylated dipeptides 11 and 12 were shown not to be COX-2 selective. Fluorbenzoylated tripeptide FB-Phe-Cys-Ser-OH was further used in molecular modeling docking studies to determine the binding mode within the active site of the COX-2 enzyme.
(PMID: 22386983)
Abstract: A series of fluorobenzoylated di- and tripeptides as potential leads for the development of molecular probes for imaging of COX-2 expression was prepared according to standard Fmoc-based solid-phase peptide synthesis. All peptides were assessed for their COX-2 inhibitory potency and selectivity profile in a fluorescence-based COX binding assay. Within the series of 15 peptides tested, cysteine-containing peptides numbered 7, 8, 11 and 12, respectively, were the most potent COX-2 inhibitors possessing IC(50) values ranging from 5 to 85 ##M. Fluorobenzoylated tripeptides 7 and 8 displayed some COX-2 selectivity (COX-2 selectivity index 2.1 and 1.6), whereas fluorobenzoylated dipeptides 11 and 12 were shown not to be COX-2 selective. Fluorbenzoylated tripeptide FB-Phe-Cys-Ser-OH was further used in molecular modeling docking studies to determine the binding mode within the active site of the COX-2 enzyme.
(PMID: 22386983)
Comment
Compounds with activity <= 50uM or explicitly reported as active by ChEMBL are flagged as active in this PubChem assay presentation.
Putative Target:
ChEMBL Target ID: 126
Target Type: SINGLE PROTEIN
Pref Name: Cyclooxygenase-2
Description: Prostaglandin G/H synthase 2
Organism: Homo sapiens
Tax ID: 9606
Confidence: Homologous single protein target assigned
Relationship Type: Homologous protein target assigned
ChEMBL target type: Target is a single protein chain
Putative Target:
ChEMBL Target ID: 126
Target Type: SINGLE PROTEIN
Pref Name: Cyclooxygenase-2
Description: Prostaglandin G/H synthase 2
Organism: Homo sapiens
Tax ID: 9606
Confidence: Homologous single protein target assigned
Relationship Type: Homologous protein target assigned
ChEMBL target type: Target is a single protein chain
Categorized Comment
ChEMBL Assay Type: Binding
ChEMBL Assay Data Source: Scientific Literature
ChEMBL Assay Data Source: Scientific Literature
Result Definitions
| TID | Name | Description | Histogram | Type | Unit | |
|---|---|---|---|---|---|---|
| Outcome | The BioAssay activity outcome | Outcome | ||||
| 1 | IC50* | IC50 PubChem standard value |  | Float | μM | |
| 2 | BEI | Binding Efficiency Index(nM) | | Float | ||
| 3 | SEI | Surface Efficiency Index(nM) | | Float | ||
| 4 | IC50 activity comment | IC50 activity comment | String | |||
| 5 | IC50 standard flag | IC50 standard flag | | Integer | ||
| 6 | IC50 qualifier | IC50 qualifier | String | |||
| 7 | IC50 published value | IC50 published value | | Float | nM | |
| 8 | IC50 standard value | IC50 standard value | | Float | nM |
* Activity Concentration.
Data Table (Concise)
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