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Updated: Jun 30, 2026

Identification of Nucleolar Factors During HIV-1 Replication Through Rev Immunoprecipitation and Mass Spectrometry
Published on: June 26, 2019
Nuclear matrix contains novel WD-repeat and disordered-region-rich proteins
Kohei Ishii1, Yasuhiro Hirano, Nanase Araki
1Graduate School of Science and Technology, Niigata University, Igarashi-2, Nishi-ku, Niigata 950-2181, Japan.
Abstract:
To find novel proteins predicted to participate in the formation of nuclear bodies, nuclear speckles, and nuclear macro-protein complexes, we applied proteome analysis to a HeLa cell nuclear matrix fraction. Proteins in the fraction were separated by SDS-PAGE, digested with trypsin, and analyzed by nanoflow liquid chromatography-iontrap-tandem mass spectrometry. Three hundred and thirty three proteins including 39 novel ones were identified. Seven WD-repeat proteins and 16 disordered region-rich proteins, which act frequently as scaffolding proteins for macro-protein complexes, were found amongst the novel proteins.
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