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Multifunctional nanoparticles composite for MALDI-MS: Cd2+-doped carbon nanotubes with CdS nanoparticles as the matrix, preconcentrating and accelerating probes of microwave enzymatic digestion of peptides and proteins for direct MALDI-MS analysis.
J Mass Spectrom. 2010 Dec; 45(12):1452-60.JM

Abstract

For the first time, we utilized multifunctional nanoparticles composite (NPs composite) for matrix-assisted laser desorption/ionization mass spectrometric (MALDI-MS) analysis of peptides and proteins. Multiwalled carbon nanotubes doped with Cd(2+) ions and modified with cadmium sulfide NPs were synthesized by a chemical reduction method at room temperature. The multifunctional NPs composite applied for the analysis of peptides and microwave-digested proteins in the atmospheric pressure matrix-assisted laser desorption/ionization ion-trap and MALDI time-of-flight (TOF) mass spectrometry (MS) was successfully demonstrated. The maximum detection sensitivity for peptides in MALDI-MS was achieved by the adsorption of negatively charged peptides onto the surfaces of NP composite through electrostatic interactions. The optimal conditions of peptide mixtures were obtained at 20 min of incubation time using 1 mg of NPs composite when the pH of the sample solution was kept higher than the pI values of peptides. The potentiality of the NP composite in the preconcentration of peptides was compared with that of the individual NP by calculating the preconcentration factors (PF) and found that the NPs composite showed a 4-6 times of PF than the other NPs. In addition, the NPs composite was also applied as heat-absorbing materials for efficient microwave tryptic digestion of cytochrome c and lysozyme from milk protein in MALDI-TOF-MS analysis. We believe that the use of NPs composite technique would be an efficient and powerful preconcentrating tool for MALDI-MS for the study of proteome research.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Shrivas K
Department of Chemistry, National Sun Yat-Sen University, 70, Lien-Hai Road, Kaohsiung 80424, Taiwan.
Wu HF
No affiliation info available

MeSH

AnimalsCadmium CompoundsCytochromes cHumansHydrogen-Ion ConcentrationManganeseMicrowavesMilkMuramidaseNanocompositesNanoparticlesNanotubes, CarbonPeptide FragmentsProteinsSensitivity and SpecificitySodium ChlorideSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationSulfidesTrypsinUbiquitinZinc Compounds

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21053343

Citation

Shrivas, Kamlesh, and Hui-Fen Wu. "Multifunctional Nanoparticles Composite for MALDI-MS: Cd2+-doped Carbon Nanotubes With CdS Nanoparticles as the Matrix, Preconcentrating and Accelerating Probes of Microwave Enzymatic Digestion of Peptides and Proteins for Direct MALDI-MS Analysis." Journal of Mass Spectrometry : JMS, vol. 45, no. 12, 2010, pp. 1452-60.
Shrivas K, Wu HF. Multifunctional nanoparticles composite for MALDI-MS: Cd2+-doped carbon nanotubes with CdS nanoparticles as the matrix, preconcentrating and accelerating probes of microwave enzymatic digestion of peptides and proteins for direct MALDI-MS analysis. J Mass Spectrom. 2010;45(12):1452-60.
Shrivas, K., & Wu, H. F. (2010). Multifunctional nanoparticles composite for MALDI-MS: Cd2+-doped carbon nanotubes with CdS nanoparticles as the matrix, preconcentrating and accelerating probes of microwave enzymatic digestion of peptides and proteins for direct MALDI-MS analysis. Journal of Mass Spectrometry : JMS, 45(12), 1452-60. https://doi.org/10.1002/jms.1861
Shrivas K, Wu HF. Multifunctional Nanoparticles Composite for MALDI-MS: Cd2+-doped Carbon Nanotubes With CdS Nanoparticles as the Matrix, Preconcentrating and Accelerating Probes of Microwave Enzymatic Digestion of Peptides and Proteins for Direct MALDI-MS Analysis. J Mass Spectrom. 2010;45(12):1452-60. PubMed PMID: 21053343.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multifunctional nanoparticles composite for MALDI-MS: Cd2+-doped carbon nanotubes with CdS nanoparticles as the matrix, preconcentrating and accelerating probes of microwave enzymatic digestion of peptides and proteins for direct MALDI-MS analysis. AU - Shrivas,Kamlesh, AU - Wu,Hui-Fen, PY - 2010/11/6/entrez PY - 2010/11/6/pubmed PY - 2011/4/13/medline SP - 1452 EP - 60 JF - Journal of mass spectrometry : JMS JO - J Mass Spectrom VL - 45 IS - 12 N2 - For the first time, we utilized multifunctional nanoparticles composite (NPs composite) for matrix-assisted laser desorption/ionization mass spectrometric (MALDI-MS) analysis of peptides and proteins. Multiwalled carbon nanotubes doped with Cd(2+) ions and modified with cadmium sulfide NPs were synthesized by a chemical reduction method at room temperature. The multifunctional NPs composite applied for the analysis of peptides and microwave-digested proteins in the atmospheric pressure matrix-assisted laser desorption/ionization ion-trap and MALDI time-of-flight (TOF) mass spectrometry (MS) was successfully demonstrated. The maximum detection sensitivity for peptides in MALDI-MS was achieved by the adsorption of negatively charged peptides onto the surfaces of NP composite through electrostatic interactions. The optimal conditions of peptide mixtures were obtained at 20 min of incubation time using 1 mg of NPs composite when the pH of the sample solution was kept higher than the pI values of peptides. The potentiality of the NP composite in the preconcentration of peptides was compared with that of the individual NP by calculating the preconcentration factors (PF) and found that the NPs composite showed a 4-6 times of PF than the other NPs. In addition, the NPs composite was also applied as heat-absorbing materials for efficient microwave tryptic digestion of cytochrome c and lysozyme from milk protein in MALDI-TOF-MS analysis. We believe that the use of NPs composite technique would be an efficient and powerful preconcentrating tool for MALDI-MS for the study of proteome research. SN - 1096-9888 UR - https://www.unboundmedicine.com/medline/citation/21053343/Multifunctional_nanoparticles_composite_for_MALDI_MS:_Cd2+_doped_carbon_nanotubes_with_CdS_nanoparticles_as_the_matrix_preconcentrating_and_accelerating_probes_of_microwave_enzymatic_digestion_of_peptides_and_proteins_for_direct_MALDI_MS_analysis_ L2 - https://doi.org/10.1002/jms.1861 DB - PRIME DP - Unbound Medicine ER -
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