Microchimica Acta

, 186:236 | Cite as

Immobilization of titanium dioxide/ions on magnetic microspheres for enhanced recognition and extraction of mono- and multi-phosphopeptides

  • Jiawen Wang
  • Zidan Wang
  • Nianrong SunEmail author
  • Chunhui DengEmail author
Original Paper


The authors are presenting a novel strategy for global phosphoproteome recognition in practical samples. It integrates metal oxide affinity chromatography (MOAC) and immobilization metal ion affinity chromatography (IMAC). This resulted in a kind of titanium dioxide/ion-based multifunctional probe (dubbed T2M). The T2M combines the features of MOAC and IMAC including their recognition preferences towards mono- and multi-phosphorylated peptides. Hence, they exhibit an outstanding recognition capability towards global phosphoproteome, high sensitivity (the limit of detection of which is merely 10 fmol) and excellent specificity in MALDI-TOF MS detection. Their performance is further demonstrated by the identification of the phosphoproteome in non-fat milk and human saliva. By combining T2M with nano LC-MS/MS, remarkable results are obtained in the tryptic digestion of healthy eye lens and cataract lens phosphoproteomes. A total of 658 and 162 phosphopeptides, respectively, were identified. This indicates that phosphorylation and the appearance of cataract can be related to each other.

Graphical abstract

Schematic presentation of the preparation of titanium dioxide/ion-based multifunctional magnetic nanomaterials (T2M). The T2M based enrichment protocol exhibits outstanding recognition capability towards global phosphoproteome. This protocol shows great prospect for clarifying mechanism of phosphorylation-related diseases via further information acquisition.


Global phosphoproteome Immobilization metal ion affinity chromatography Metal oxide affinity chromatography Cataract Functionalized magnetic nanomaterials 



This work was financially supported by National Key R&D Program of China (2018YFA0507501) and the National Natural Science Foundation of China (21425518).

Compliance with ethical standards

The author(s) declare that they have no competing interests.

All the experiments were performed in compliance with the relevant laws and institutional guidelines, conducted according to the Declaration of Helsinki and approved by the Ethics Committee of Fudan University.

Supplementary material

604_2019_3346_MOESM1_ESM.docx (4.7 mb)
ESM 1 (DOCX 4838 kb)


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Chemistry and The Fifth People’s Hospital of ShanghaiFudan UniversityShanghaiChina
  2. 2.Institutes of Biomedical Sciences and Collaborative Innovation Center of Genetics and DevelopmentFudan UniversityShanghaiChina

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