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Article

Comprehensive Atlas of the Myelin Basic Protein Interaction Landscape

1
Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997 Moscow, Russia
2
Federal Research and Clinical Center of Physical-Chemical Medicine of Federal Medical Biological Agency, 119435 Moscow, Russia
3
Moscow Institute of Physics and Technology, National Research University, 141701 Dolgoprudny, Moscow Region, Russia
4
Department of Fundamental Medicine, Lomonosov Moscow State University, 117192 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Mark S. Johnson
Biomolecules 2021, 11(11), 1628; https://doi.org/10.3390/biom11111628
Received: 30 September 2021 / Revised: 27 October 2021 / Accepted: 29 October 2021 / Published: 3 November 2021
(This article belongs to the Collection Molecular Biology: Feature Papers)
Intrinsically disordered myelin basic protein (MBP) is one of the key autoantigens in autoimmune neurodegeneration and multiple sclerosis particularly. MBP is highly positively charged and lacks distinct structure in solution and therefore its intracellular partners are still mostly enigmatic. Here we used combination of formaldehyde-induced cross-linking followed by immunoprecipitation and liquid chromatography-tandem mass spectrometry (LC-MS/MS) to elucidate the interaction network of MBP in mammalian cells and provide the list of potential MBP interacting proteins. Our data suggest that the largest group of MBP-interacting proteins belongs to cellular proteins involved in the protein translation machinery, as well as in the spatial and temporal regulation of translation. MBP interacts with core ribosomal proteins, RNA helicase Ddx28 and RNA-binding proteins STAU1, TDP-43, ADAR-1 and hnRNP A0, which are involved in various stages of RNA biogenesis and processing, including specific maintaining MBP-coding mRNA. Among MBP partners we identified CTNND1, which has previously been shown to be necessary for myelinating Schwann cells for cell-cell interactions and the formation of a normal myelin sheath. MBP binds proteins MAGEB2/D2 associated with neurotrophin receptor p75NTR, involved in pathways that promote neuronal survival and neuronal death. Finally, we observed that MBP interacts with RNF40–a component of heterotetrameric Rnf40/Rnf20 E3 ligase complex, recruited by Egr2, which is the central transcriptional regulator of peripheral myelination. Concluding, our data suggest that MBP may be more actively involved in myelination not only as a main building block but also as a self-regulating element. View Full-Text
Keywords: myelin basic protein; MBP; interactome; formaldehyde cross-linking; MS-based proteomic analysis myelin basic protein; MBP; interactome; formaldehyde cross-linking; MS-based proteomic analysis
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MDPI and ACS Style

Smirnova, E.V.; Rakitina, T.V.; Ziganshin, R.H.; Arapidi, G.P.; Saratov, G.A.; Kudriaeva, A.A.; Belogurov, A.A. Comprehensive Atlas of the Myelin Basic Protein Interaction Landscape. Biomolecules 2021, 11, 1628. https://doi.org/10.3390/biom11111628

AMA Style

Smirnova EV, Rakitina TV, Ziganshin RH, Arapidi GP, Saratov GA, Kudriaeva AA, Belogurov AA. Comprehensive Atlas of the Myelin Basic Protein Interaction Landscape. Biomolecules. 2021; 11(11):1628. https://doi.org/10.3390/biom11111628

Chicago/Turabian Style

Smirnova, Evgeniya V., Tatiana V. Rakitina, Rustam H. Ziganshin, Georgij P. Arapidi, George A. Saratov, Anna A. Kudriaeva, and Alexey A. Belogurov. 2021. "Comprehensive Atlas of the Myelin Basic Protein Interaction Landscape" Biomolecules 11, no. 11: 1628. https://doi.org/10.3390/biom11111628

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