A functional proteomics platform to reveal the sequence determinants of lysine methyltransferase substrate selectivity.

A functional proteomics platform to reveal the sequence determinants of lysine methyltransferase substrate selectivity.
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DOI:
10.1126/sciadv.aav2623
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发表时间:
2018-11
期刊:
影响因子:
13.6
通讯作者:
Rothbart SB
Rothbart SB
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Cornett EM;Dickson BM;Krajewski K;Spellmon N;Umstead A;Vaughan RM;Shaw KM;Versluis PP;Cowles MW;Brunzelle J;Yang Z;Vega IE;Sun ZW;Rothbart SB

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Mapping lysine methyltransferase substrate selectivity reveals gaps in the proteome-wide curation of lysine methylomes. Lysine methylation is a key regulator of histone protein function. Beyond histones, few connections have been made to the enzymes responsible for the deposition of these posttranslational modifications. Here, we debut a high-throughput functional proteomics platform that maps the sequence determinants of lysine methyltransferase (KMT) substrate selectivity without a priori knowledge of a substrate or target proteome. We demonstrate the predictive power of this approach for identifying KMT substrates, generating scaffolds for inhibitor design, and predicting the impact of missense mutations on lysine methylation signaling. By comparing KMT selectivity profiles to available lysine methylome datasets, we reveal a disconnect between preferred KMT substrates and the ability to detect these motifs using standard mass spectrometry pipelines. Collectively, our studies validate the use of this platform for guiding the study of lysine methylation signaling and suggest that substantial gaps exist in proteome-wide curation of lysine methylomes.
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