A Chemical Probe For Tudor Domain Protein Spin1 to Investigate Chromatin Functions

06 February 2019, Version 1

Abstract

Lysine and arginine methylation are amongst the most frequent modifications on unstructured histone tails and in
combination with other modifications provide the basis for a combinatorial 'chromatin or histone code'. Recognition of modified
histone residues is accomplished in a specific manner by 'reader' domains that recognize chromatin modifications, allowing for
association with specific effector complexes that mediate chromatin functions. The methyl-lysine and methyl-arginine reader domain
protein SPINDLIN1 (SPIN1) belongs to a family of 5 human genes, and has been identified as a putative oncogene and transcriptional
co-activator. It contains three Tudor domains that are able to mediate chromatin binding. Here we report on the discovery
of a potent and selective bidentate Tudor domain inhibitor, which simultaneously engages Tudor domains 1 and 2 and effectively
competes with chromatin binding in cells. Inhibitor, chemoproteomic and knockdown studies in squamous cell carcinoma indicate
complex SPIN-mediated chromatin interactions leading to transcriptional changes in cellular differentiation processes.

Keywords

epigenetics
chromatin
tudor domain
SPIN1
Chemical Probe

Supplementary materials

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ONLINE Materials and Methods Fagan et al
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SI Data 1 compounds Fagan et al
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SI DATA 2 - RNAseq Pathway analysis
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Supplementary Information Fagan et al JACS
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Supplementary Notes Fagan et al
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