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Can Edman degradation be used for quantification? Isotope-dilution liquid chromatography–electrospray ionization tandem mass spectrometry and the long-term stability of 20 phenylthiohydantoin-amino acids. Anal Bioanal Chem 2013; 405:8001-10. [DOI: 10.1007/s00216-013-6901-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 03/01/2013] [Accepted: 03/05/2013] [Indexed: 11/26/2022]
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Oe T, Maekawa M, Satoh R, Lee SH, Goto T. Combining [13C6]-phenylisothiocyanate and the Edman degradation reaction: a possible breakthrough for absolute quantitative proteomics together with protein identification. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2010; 24:173-179. [PMID: 20013953 DOI: 10.1002/rcm.4372] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This manuscript describes the results of a preliminary experiment performed as 'proof of concept' of a novel approach to absolute quantitation of proteins without the use of standard proteins. Absolute quantitation remains a challenging issue in the proteomics field. Therefore, we propose a combination of [(13)C(6)]-phenylisothiocyanate (PITC) and the Edman degradation reaction as a possible breakthrough. [(13)C(6)]-PITC was synthesized from [(13)C(6)]-aniline with O,O'-di-2-pyridyl thiocarbonate to prepare [(13)C(6)]-phenylthiohydantoin (PTH)-amino acids as internal standards. Upon the Edman degradation reaction, it has been confirmed that a model protein, bovine serum albumin (BSA), releases the N-terminal amino acid quantitatively as PTH-Asp. The standard curve of PTH-Asp against [(13)C(6)]-PTH-Asp showed good linearity (r(2) = 0.9977). BSA could be quantified as PTH-Asp using the standard curve. In addition, the residual des-Asp(1)-BSA provided sufficient information for further protein identification.
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Affiliation(s)
- Tomoyuki Oe
- Department of Bio-analytical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aobayama, Aoba-ku, Sendai 980-8578, Japan.
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Cantillo D, Ávalos M, Babiano R, Cintas P, Jiménez JL, Light ME, Palacios JC. Thionation of Mesoionics with Isothiocyanates: Evidence Supporting a Four-Step Domino Process and Ruling Out a [2 + 2] Mechanism. J Org Chem 2009; 74:3698-705. [DOI: 10.1021/jo900028c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Cantillo
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Martín Ávalos
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Reyes Babiano
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Pedro Cintas
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - José L. Jiménez
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Mark E. Light
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
| | - Juan C. Palacios
- Departamento de Química Orgánica e Inorgánica, QUOREX Research Group, Facultad de Ciencias, Universidad de Extremadura, E-06071 Badajoz, Spain, and Department of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
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Humeres E, Pinheiro de Souza E, Debacher NA, Aliev AE. Synthesis and coordinating ability of chitosan dithiocarbamate and analogs towards Cu(II) ions. J PHYS ORG CHEM 2002. [DOI: 10.1002/poc.559] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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