2-Fluorotyrosine is a valuable but understudied amino acid for protein-observed 19F NMR
2-Fluorotyrosine is a valuable but understudied amino acid for protein-observed 19F NMR
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2-氟酪氨酸是一种有价值但尚未充分研究的氨基酸,可用于蛋白质观察 19F NMR
DOI:
10.1007/s10858-019-00290-0
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发表时间:
2020
影响因子:
2.7
通讯作者:
Pomerantz, William C.
中科院分区:
文献类型:
--
作者:
Ycas, Peter D.;Wagner, Nicole;Olsen, Noelle M.;Fu, Riqiang;Pomerantz, William C.
Incorporation of19F into proteins allows for the study of their molecular interactions via NMR. The study of19F labeled aromatic amino acids has largely focused on 4-,5-, or 6-fluorotryptophan, 4-fluorophenylalanine, (4,5, or 6FW) or 3-fluorotyrosine (3FY), whereas 2-fluorotyrosine (2FY) has remained largely understudied. Here we report a comparative analysis with different fluorinated amino acids. We first report the NMR chemical shift responsiveness of five aromatic amino acid mimics to changes in solvent polarity and find that the most responsive, a mimic of 3FY, has a 2.9-fold greater change in chemical shift compared to the other amino acid mimics in aprotic solvents including the 2FY mimic. We also probed the utility of 2FY for19F NMR by measuring its NMR relaxation properties in solution and the chemical shift anisotropy (CSA) of a polycrystalline sample of the amino acid by magic angle spinning. Using protein-observed fluorine NMR (PrOF NMR), we compared the influence of 2FY and 3FY incorporation on stability and pKaperturbation when incorporated into the KIX domain of CBP/p300. Lastly, we investigated the19F NMR response of both 2FY and 3FY-labeled proteins to a protein–protein interaction partner, MLL, and discovered that 2FY can report on allosteric interactions that are not observed with 3FY-labeling in this protein complex. The reduced perturbation to pKaand similar but reduced CSA of 2FY to 3FY supports 2FY as a suitable alternative amino acid for incorporation into large proteins for19F NMR analysis.
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影响因子:
15
作者:
Seyedsayamdost, MR;Reece, SY;Stubbe, J
通讯作者:
Stubbe, J
影响因子:
5.6
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Lingyun Song;Q. Teng;R. Phillips;J. Brewer;A. Summers
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2.2
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Duerr, Ulrich H. N.;Grage, Stephan L.;Ulrich, Anne S.
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Ulrich, Anne S.
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J. Rainey
影响因子:
3.9
作者:
Hawk LML;Gee CT;Urick AK;Hu H;Pomerantz WCK
通讯作者:
Pomerantz WCK