期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 105, 期 40, 页码 15352-15357出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0805127105
关键词
2DIR; amino acid; bioinformatics; vibrational
资金
- Engineering and Physical Sciences Research Council (EPSRC)
- Chemical Biology Centre Doctoral Training Centre (CBC DTC)
- Engineering and Physical Sciences Research Council [EP/C530187/1, EP/C54269X/1, EP/C541839/1] Funding Source: researchfish
- EPSRC [EP/C54269X/1] Funding Source: UKRI
Electron-vibration-vibration two-dimensional coherent spectroscopy, a variant of 2DIR, is shown to be a useful tool to differentiate a set of 10 proteins based on their amino acid content. Two-dimensional vibrational signatures of amino acid side chains are identified and the corresponding signal strengths used to quantify their levels by using a methyl vibrational feature as an internal reference. With the current apparatus, effective differentiation can be achieved in four to five minutes per protein, and our results suggest that this can be reduced to < 1 min per protein by using the same technology. Finally, we show that absolute quantification of protein levels is relatively straightforward to achieve and discuss the potential of an all-optical high-throughput proteomic platform based on two-dimensional infrared spectroscopic measurements.
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