<i>In vivo</i> Incorporation of Unnatural Amino Acids to Probe Structure, Dynamics, and Ligand Binding in a Large Protein by Nuclear Magnetic Resonance Spectroscopy
作者:Susan E. Cellitti、David H. Jones、Leanna Lagpacan、Xueshi Hao、Qiong Zhang、Huiyong Hu、Scott M. Brittain、Achim Brinker、Jeremy Caldwell、Badry Bursulaya、Glen Spraggon、Ansgar Brock、Youngha Ryu、Tetsuo Uno、Peter G. Schultz、Bernhard H. Geierstanger
DOI:10.1021/ja801602q
日期:2008.7.1
UV-cleavage of the nitrobenzyl-photocage from oNBTyr re-established binding. These data suggest not onlyrobust methods for using unnatural amino acids to study large proteins by NMR but also establish a new avenue for the site-specific labeling of proteins at individual residues without altering the protein sequence, a feat that can currently not be accomplished with any other method.
recover to natural tyrosine after UV-photocleavage was greatly improved from 20% to 81% by using 2-nitrobenzyl bromide as the nucleophilic reagent. Through genetically introducing 15N-oNBY and consequent photo-cleavage, the site-specific 15N-Tyr NMR analysis of plant ABA (abscisic acid) receptor PYL10 was implemented without any residue variation. This isotope labelling of tyrosine onto protein backbone
NOVEL PATHWAY FOR THE SYNTHESIS OF DIAZIRINES, THAT MAY OR MAY NOT BE ENRICHED IN NITROGEN-15
申请人:UNIVERSITE DE ROUEN NORMANDIE
公开号:US20220098155A1
公开(公告)日:2022-03-31
The present invention concerns a novel method for synthesising diazirines, that may or may not be enriched in nitro-gen-15, from amino acids or imines, via a one-pot synthesis method, comprising the reaction of the starting amino acid or imine with ammonia, which may or may not be enriched in nitrogen-15, and a hypervalent iodine oxidant. The present invention also relates to a method for synthesising ammonia enriched in nitrogen-15. The invention also concerns certain diazirines of formula (I) likely to be obtained by the claimed synthesis method, and also refers to the
15
N
2
-diazirines of formula (I′). The claimed diazirines can be used in photoaffinity labelling. The
15
N
2
-diazirines can also be used in hyperpolarisation, in particular in the medical imaging field.
BALDWIN, J. E.;NG, S. C.;PRATT, A. J.;RUSSELL, M. A.;DYER, R. L., TETRAHEDRON LETT., 28,(1987) N 20, 2303-2304
作者:BALDWIN, J. E.、NG, S. C.、PRATT, A. J.、RUSSELL, M. A.、DYER, R. L.
DOI:——
日期:——
Iodonitrene in Action: Direct Transformation of Amino Acids into Terminal Diazirines and <sup>15</sup>N<sub>2</sub>-Diazirines and Their Application as Hyperpolarized Markers
作者:Thomas Glachet、Hamid Marzag、Nathalie Saraiva Rosa、Johannes F. P. Colell、Guannan Zhang、Warren S. Warren、Xavier Franck、Thomas Theis、Vincent Reboul
DOI:10.1021/jacs.9b07035
日期:2019.8.28
terminal diazirines has been developed using phenyliodonium diacetate (PIDA) and ammonia. This PIDA mediated transformation occurs via three consecutive reactions and involves an iodonitrene intermediate. This method is tolerant to most functional groups found on the lateral chain of amino acids, it is operationally simple, and can be scaled up to provide multigram quantities of diazirine. Interestingly