Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II.
Transcription-related proteins are frequently identified as targets of sumoylation, including multiple subunits of the RNA polymerase II (RNAPII) general transcription factors (GTFs). However, it is not known how sumoylation affects GTFs or whether they are sumoylated when they assemble at promoters...
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oai:doaj.org-article:3f871496aea2456783b17063c8efb9eb2021-12-02T20:03:18ZDynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II.1553-73901553-740410.1371/journal.pgen.1009828https://doaj.org/article/3f871496aea2456783b17063c8efb9eb2021-09-01T00:00:00Zhttps://doi.org/10.1371/journal.pgen.1009828https://doaj.org/toc/1553-7390https://doaj.org/toc/1553-7404Transcription-related proteins are frequently identified as targets of sumoylation, including multiple subunits of the RNA polymerase II (RNAPII) general transcription factors (GTFs). However, it is not known how sumoylation affects GTFs or whether they are sumoylated when they assemble at promoters to facilitate RNAPII recruitment and transcription initiation. To explore how sumoylation can regulate transcription genome-wide, we performed SUMO ChIP-seq in yeast and found, in agreement with others, that most chromatin-associated sumoylated proteins are detected at genes encoding tRNAs and ribosomal proteins (RPGs). However, we also detected 147 robust SUMO peaks at promoters of non-ribosomal protein-coding genes (non-RPGs), indicating that sumoylation also regulates this gene class. Importantly, SUMO peaks at non-RPGs align specifically with binding sites of GTFs, but not other promoter-associated proteins, indicating that it is GTFs specifically that are sumoylated there. Predominantly, non-RPGs with SUMO peaks are among the most highly transcribed, have high levels of TFIIF, and show reduced RNAPII levels when cellular sumoylation is impaired, linking sumoylation with elevated transcription. However, detection of promoter-associated SUMO by ChIP might be limited to sites with high levels of substrate GTFs, and promoter-associated sumoylation at non-RPGs may actually be far more widespread than we detected. Among GTFs, we found that TFIIF is a major target of sumoylation, specifically at lysines 60/61 of its Tfg1 subunit, and elevating Tfg1 sumoylation resulted in decreased interaction of TFIIF with RNAPII. Interestingly, both reducing promoter-associated sumoylation, in a sumoylation-deficient Tfg1-K60/61R mutant strain, and elevating promoter-associated SUMO levels, by constitutively tethering SUMO to Tfg1, resulted in reduced RNAPII occupancy at non-RPGs. This implies that dynamic GTF sumoylation at non-RPG promoters, not simply the presence or absence of SUMO, is important for maintaining elevated transcription. Together, our findings reveal a novel mechanism of regulating the basal transcription machinery through sumoylation of promoter-bound GTFs.Mohammad S BaigYimo DouBenjamin G BergeyRussell BaharJustin M BurgenerMarjan MoallemJames B McNeilAkhi AkhterGiovanni L BurkeVeroni S Sri TheivakadadchamPatricia RichardDamien D'AmoursEmanuel RosoninaPublic Library of Science (PLoS)articleGeneticsQH426-470ENPLoS Genetics, Vol 17, Iss 9, p e1009828 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
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| topic |
Genetics QH426-470 |
| spellingShingle |
Genetics QH426-470 Mohammad S Baig Yimo Dou Benjamin G Bergey Russell Bahar Justin M Burgener Marjan Moallem James B McNeil Akhi Akhter Giovanni L Burke Veroni S Sri Theivakadadcham Patricia Richard Damien D'Amours Emanuel Rosonina Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II. |
| description |
Transcription-related proteins are frequently identified as targets of sumoylation, including multiple subunits of the RNA polymerase II (RNAPII) general transcription factors (GTFs). However, it is not known how sumoylation affects GTFs or whether they are sumoylated when they assemble at promoters to facilitate RNAPII recruitment and transcription initiation. To explore how sumoylation can regulate transcription genome-wide, we performed SUMO ChIP-seq in yeast and found, in agreement with others, that most chromatin-associated sumoylated proteins are detected at genes encoding tRNAs and ribosomal proteins (RPGs). However, we also detected 147 robust SUMO peaks at promoters of non-ribosomal protein-coding genes (non-RPGs), indicating that sumoylation also regulates this gene class. Importantly, SUMO peaks at non-RPGs align specifically with binding sites of GTFs, but not other promoter-associated proteins, indicating that it is GTFs specifically that are sumoylated there. Predominantly, non-RPGs with SUMO peaks are among the most highly transcribed, have high levels of TFIIF, and show reduced RNAPII levels when cellular sumoylation is impaired, linking sumoylation with elevated transcription. However, detection of promoter-associated SUMO by ChIP might be limited to sites with high levels of substrate GTFs, and promoter-associated sumoylation at non-RPGs may actually be far more widespread than we detected. Among GTFs, we found that TFIIF is a major target of sumoylation, specifically at lysines 60/61 of its Tfg1 subunit, and elevating Tfg1 sumoylation resulted in decreased interaction of TFIIF with RNAPII. Interestingly, both reducing promoter-associated sumoylation, in a sumoylation-deficient Tfg1-K60/61R mutant strain, and elevating promoter-associated SUMO levels, by constitutively tethering SUMO to Tfg1, resulted in reduced RNAPII occupancy at non-RPGs. This implies that dynamic GTF sumoylation at non-RPG promoters, not simply the presence or absence of SUMO, is important for maintaining elevated transcription. Together, our findings reveal a novel mechanism of regulating the basal transcription machinery through sumoylation of promoter-bound GTFs. |
| format |
article |
| author |
Mohammad S Baig Yimo Dou Benjamin G Bergey Russell Bahar Justin M Burgener Marjan Moallem James B McNeil Akhi Akhter Giovanni L Burke Veroni S Sri Theivakadadcham Patricia Richard Damien D'Amours Emanuel Rosonina |
| author_facet |
Mohammad S Baig Yimo Dou Benjamin G Bergey Russell Bahar Justin M Burgener Marjan Moallem James B McNeil Akhi Akhter Giovanni L Burke Veroni S Sri Theivakadadcham Patricia Richard Damien D'Amours Emanuel Rosonina |
| author_sort |
Mohammad S Baig |
| title |
Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II. |
| title_short |
Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II. |
| title_full |
Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II. |
| title_fullStr |
Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II. |
| title_full_unstemmed |
Dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by RNA polymerase II. |
| title_sort |
dynamic sumoylation of promoter-bound general transcription factors facilitates transcription by rna polymerase ii. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2021 |
| url |
https://doaj.org/article/3f871496aea2456783b17063c8efb9eb |
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