(S)-5-(tert-butoxycarbonyl)-1,2,5-triazaspiro[2.4]hept-1-ene-6-carboxylic acid

Novel photo-crosslinking amino acid, which can be incorporated into proteins by cultivation or by chemical synthesis into peptides and other synthetic molecules. Irradiated with UV (ca. 360 nm) for 10 min on ice yields a highly reactive carbene species that rapidly reacts with neighboring molecules to form an irreversible covalent bond. References: Protein-Polymer Conjugation via Ligand Affinity and Photoactivation of Glutathione S-Transferase; En-Wei Lin, Natalie Boehnke, and Heather D. Maynard; Bioconjugate Chem. 2014; 25: 1902-1909; dx.doi.org/10.1021/bc500380r. Cell-Based Proteome Profiling of Potential Dasatinib Targets by Use of Affinity-Based Probes; Haibin Shi, Chong-Jing Zhang, Grace Y. J. Chen, and Shao Q. Yao; J. Am. Chem. Soc. 2012; 134: 3001-3014; dx.doi.org/10.1021/ja208518u. Probing Protein-Protein Interactions with a Genetically Encoded Photocrosslinking Amino Acid; Hui-wang Ai, Weijun Shen, Amit Sagi, Peng R. Chen, and Peter G. Schultz; ChemBioChem 2011; 12: 1854 - 1857; DOI: 10.1002/cbic.201100194 Proteome profiling reveals potential cellular targets of staurosporine using a clickable cell-permeable probe; Haibin Shi, Xiamin Cheng, Siu Kwan Sze and Shao Q. Yao; Chem. Commun. 2011; 47: 11306-11308; DOI: 10.1039/c1cc14824a. Direct Interaction between an Allosteric Agonist Pepducin and the Chemokine Receptor CXCR4; Jay M. Janz, Yong Ren, Richard Looby, Manija A. Kazmi, Pallavi Sachdev, Amy Grunbeck, Lynn Haggis, Daniel Chinnapen, Amy Ying Lin, Christoph Seibert, Thomas McMurry, Kenneth E. Carlson, Tom W. Muir, Stephen Hunt III, and Thomas P. Sakmar; J. Am. Chem. Soc. 2011; 133: 15878-15881; dx.doi.org/10.1021/ja206661w. Synthesis and application of photoproline - a photoactivatable derivative of proline; Benjamin Van der Meijden and John A. Robinson; ARKIVOC 2011 (vi) 130-136., Photo-crosslinking of proteins in intact cells reveals a dimeric structure of cyclooxygenase-2 and an inhibitor-sensitive oligomeric structure of microsomal prostaglandin E2 synthase-1; Pierre-Olivier Hétu, Marc Ouellet, Jean-Pierre Falgueyret, Chidambaram Ramachandran, Joel Robichaud, Robert Zamboni, Denis Riendeau; Archives of Biochemistry and Biophysics 2008; 477: 155-162; DOI: 10.1016/j.abb.2008.04.038. Covalent Capture of Phospho-Dependent Protein Oligomerization by Site-Specific Incorporation of a Diazirine Photo-Cross-Linker; Miquel Vila-Perelló, Matthew R. Pratt, Frej Tulin, and Tom W. Muir; J. Am. Chem. Soc. 2007; 129: 8068-8069; DOI: 10.1021/ja072013j. Photo-Leucine Incorporation Reveals the Target of a Cyclodepsipeptide Inhibitor of Cotranslational Translocation; Andrew L. MacKinnon, Jennifer L. Garrison, Ramanujan S. Hegde, and Jack Taunton; J. Am. Chem. Soc. 2007; 129: 14560-14561; DOI: 10.1021/ja076250y. Synthesis of Photoactive Analogues of a Cystine Knot Trypsin Inhibitor Protein; Thomas Durek, Junliang Zhang, Chuan He, and Stephen B.H. Kent; Org. Lett. 2007; 9(26): 5497-5500; DOI: 10.1021/ol702461z. Photo-leucine and photo-methionine allow identification of protein-protein interactions in living cells; Monika Suchanek, Anna Radzikowska, Christoph Thiele; Nature Methods 2005; 1-7; DOI: 10.1038/NMETH752.