High-throughput screen for small molecule inhibitors of Mint1-PDZ domains.
نویسندگان
چکیده
Several hundred PDZ (postsynaptic density-95, Drosophila disks-large, ZO-1) domain-containing proteins have been identified in the human genome. PDZ domains play a critical role in organization and function of cellular signaling pathways. Thus, small molecule inhibitors of PDZ domain association with their targets have wide potential applications as research and therapeutic agents. PDZ domains typically bind to a carboxyl-terminal tail of the target protein. Here we describe a high-throughput screening (HTS) assay for small molecule inhibitors of association between Mint1-PDZ domains and N-type Ca2+ channel carboxyl-terminal peptide (NC peptide). The performance of a homogeneous time-resolved fluorescence resonance energy transfer (HTRF) and an amplified luminescent proximity homogeneous assay (ALPHA) were systematically compared in parallel pilot HTS experiments with glutathione S-transferase-Mint1-PDZ1/2 protein and biotinylated NC peptide. Both of the two assays showed similar sensitivities in our target protein assay. Using HTRF-based assay we screened a library of 100,000 small molecule compounds and identified a number of potential "hits." The activity of isolated "hits" was confirmed by ALPHA assay. However, further evaluation revealed that isolated "hits" most likely act as "promiscuous binders," not as specific Mint-PDZ inhibitors, and that additional screening will be required to identify the true Mint-PDZ inhibitors. The assays described provided an example of HTS for a small molecule inhibitor of Mint-PDZ domain that can be easily adapted to other PDZ domain-mediated interactions.
منابع مشابه
An In Silico Analysis of the Binding Modes and Binding Affinities of Small Molecule Modulators of PDZ-Peptide Interactions
Inhibitors of PDZ-peptide interactions have important implications in a variety of biological processes including treatment of cancer and Parkinson's disease. Even though experimental studies have reported characterization of peptidomimetic inhibitors of PDZ-peptide interactions, the binding modes for most of them have not been characterized by structural studies. In this study we have attempte...
متن کاملPhenotypic screening of small molecule libraries by high throughput cell imaging.
We have developed high throughput fluorescence cell imaging methods to screen chemical libraries for compounds with effects on diverse aspects of cell physiology. We describe screens for compounds that arrest cells in mitosis, that block cell migration, and that block the secretory pathway. Each of these screens yielded specific inhibitors for research use, and the mitosis screen identified Eg5...
متن کاملAssociation of neuronal calcium channels with modular adaptor proteins.
Presynaptic voltage-gated calcium (Ca(2+)) channels mediate Ca(2+) influx into the presynaptic terminal that triggers synaptic vesicle fusion and neurotransmitter release. The immediate proximity of Ca(2+) channels to the synaptic vesicle release apparatus is critical for rapid and efficient synaptic transmission. In a series of biochemical experiments, we demonstrate a specific association of ...
متن کاملBiomol Screen Duncan I . Mackie and David L . Roman Protein Interaction Using AlphaScreen − RGS 17 Protein − α Development of a Novel High - Throughput Screen and Identification of Small - Molecule Inhibitors of the G
متن کامل
A High Throughput Assay to Identify Small Molecule Modulators of Prostatic Acid Phosphatase
Prostatic acid phosphatase (PAP) is expressed in nociceptive neurons and functions as an ectonucleotidase. Injection of the secretory isoform of PAP has potent antinociceptive effects in mouse models of chronic pain. These data suggested that a small molecule activator of PAP may have utility as a novel therapeutic for chronic pain, while inhibitors could be used to acutely inhibit PAP in vitro...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Assay and drug development technologies
دوره 5 6 شماره
صفحات -
تاریخ انتشار 2007