[125I]-N-[(3-Azido-5-iodo)benzyl]dantrolene and [125I]-N-{[3-Iodo-5-(3-trifluoromethyl-3H-diazirin-3-yl)]benzyl}dantrolene: photoaffinity probes specific for the physiological Ca2+ release from sarcoplasmic reticulum of skeletal muscle
摘要:
In order to capture and identify key molecules that regulate the release of Ca2+ from the sarcoplasmic reticulum (SR) of skeletal muscle, we designed specific photoaffinity probes based on the structural modification of dantrolene. Thus, GIF-0082 and GIF-0276 possessing azido- and trifluoromethyldiazirinyl-benzyl groups, respectively, at the hydantoin moiety were found to have a highly selective inhibitory effect on physiological Ca2+ release (PCR) without affecting Ca2+-induced Ca2+ release (CICR). Successful realization of the sharp discrimination between PCR and CICR has led to the creation of [I-125]GIF-0082 and [I-125]GIF-0276, which were synthesized by substituting a stannyl group with I-125 in the corresponding phenylstannane precursors. (C) 2002 Published by Elsevier Science Ltd.
synthetic routes to diazidobuildingblocks with different connectable groups were established on the basis of the sequential iridium-catalyzed C–H borylation and copper-catalyzed azidation of 1,3-disubstituted benzenes, followed by diverse azido-friendly functional-group transformations. These buildingblocks facilitate the rapid development of effective diazidophotoaffinitylabelingprobes that are useful
Suzuki–Miyauracoupling of 3-azido-5-(azidomethyl)phenylboronic acid pinacol ester with various aryl bromides affords corresponding diazido-functionalized biaryl compounds in good yields. This approach provides an easy access to radioisotope-free photoaffinity probes possessing biaryl structure. By using this method, we prepared a novel diazido-functionalized dantrolene analog, which showed selective
Design of dantrolene-derived probes for radioisotope-free photoaffinity labeling of proteins involved in the physiological Ca2+ release from sarcoplasmic reticulum of skeletal muscle
Bifunctional dantrolene derivatives have been synthesized as probes for radioisotope-free photoaffinitylabeling with the aim of elucidating the molecular mechanism of skeletal muscle contraction. GIF-0430 and GIF-0665 are aromatic azido-functionalized derivatives that were designed to selectively inhibit physiological Ca2+ release (PCR) from sarcoplasmic reticulum (SR) in mouse skeletal muscle without