Matrix-assisted laser desorption/ionization time-of-flight and nano-electrospray ionization ion trap mass spectrometric characterization of 1-cyano-2-substituted-benz[f ]isoindole derivatives of peptides for fluorescence detection

Linnemayr, Katharina; Brückner, Andrea; Körner, Roman; Hahn, Rainer; Jungbauer, Alois; Josić, Dj.; Roepstorff, Peter; Rizzi, Andreas; Allmaier, Günter

doi:10.1002/(sici)1096-9888(199904)34:4<427::aid-jms779>3.0.co;2-c

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Determination of the stoichiometry of protein complexes using liquid chromatography with fluorescence and mass spectrometric detection of fluorescently labeled proteolytic peptides

Hochleitner¹,

Sondermann

Lottspeich³

2004

Proteomics

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A method for the determination of the stoichiometry of protein complexes has been developed, which is based on proteolytic digestion of the complex, labeling with a fluorescent reagent, specific for amino or sulfhydryl groups, and separation by liquid chromatography with fluorescence and mass spectrometric detection. The intensity of the fluorescence signal of the labeled peptides resulting from different proteins is directly proportional to the stoichiometry of these proteins in the complex. The performance of the method was evaluated with standard peptides and proteins to ensure that accurate molar ratios can be obtained from the fluorescence chromatogram. Standard deviations of the measured molar ratio from the expected molar ratio were below 10% for both peptides and proteins. The method was finally employed for the determination of the stoichiometry of the 1:1 complex of sFc gamma RIII and hFc1. Using the described methodology, a stoichiometry of 1:1.1 was measured, which agrees well with a 1:1 complex.

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Determination of the stoichiometry of protein complexes using liquid chromatography with fluorescence and mass spectrometric detection of fluorescently labeled proteolytic peptides

Hochleitner¹,

Sondermann

Lottspeich³

2004

Proteomics

View full text Add to dashboard Cite

show abstract

Chapter 19 Recent developments in the chemistry and application of analytical derivatizations

Rosenfeld¹

2002

Sampling and Sample Preparation for Field and Laboratory

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Matrix-assisted laser desorption/ionization time-of-flight and nano-electrospray ionization ion trap mass spectrometric characterization of 1-cyano-2-substituted-benz[f ]isoindole derivatives of peptides for fluorescence detection

Cited by 2 publications

References 21 publications

Determination of the stoichiometry of protein complexes using liquid chromatography with fluorescence and mass spectrometric detection of fluorescently labeled proteolytic peptides

Determination of the stoichiometry of protein complexes using liquid chromatography with fluorescence and mass spectrometric detection of fluorescently labeled proteolytic peptides

Chapter 19 Recent developments in the chemistry and application of analytical derivatizations

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