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Article: Directed evolution of an enhanced POU reprogramming factor for cell fate engineering

TitleDirected evolution of an enhanced POU reprogramming factor for cell fate engineering
Authors
Keywordsreprogramming
protein engineering
POU
cell fate conversion
molecular evolution
Issue Date2021
PublisherOxford University Press, published in association with Society for Molecular Biology and Evolution. The Journal's web site is located at http://mbe.oxfordjournals.org/
Citation
Molecular Biology and Evolution, 2021, v. 38 n. 7, p. 2854-2868 How to Cite?
AbstractTranscription factor-driven cell fate engineering in pluripotency induction, transdifferentiation, and forward reprogramming requires efficiency, speed, and maturity for widespread adoption and clinical translation. Here, we used Oct4, Sox2, Klf4, and c-Myc driven pluripotency reprogramming to evaluate methods for enhancing and tailoring cell fate transitions, through directed evolution with iterative screening of pooled mutant libraries and phenotypic selection. We identified an artificially evolved and enhanced POU factor (ePOU) that substantially outperforms wild-type Oct4 in terms of reprogramming speed and efficiency. In contrast to Oct4, not only can ePOU induce pluripotency with Sox2 alone, but it can also do so in the absence of Sox2 in a three-factor ePOU/Klf4/c-Myc cocktail. Biochemical assays combined with genome-wide analyses showed that ePOU possesses a new preference to dimerize on palindromic DNA elements. Yet, the moderate capacity of Oct4 to function as a pioneer factor, its preference to bind octamer DNA and its capability to dimerize with Sox2 and Sox17 proteins remain unchanged in ePOU. Compared with Oct4, ePOU is thermodynamically stabilized and persists longer in reprogramming cells. In consequence, ePOU: 1) differentially activates several genes hitherto not implicated in reprogramming, 2) reveals an unappreciated role of thyrotropin-releasing hormone signaling, and 3) binds a distinct class of retrotransposons. Collectively, these features enable ePOU to accelerate the establishment of the pluripotency network. This demonstrates that the phenotypic selection of novel factor variants from mammalian cells with desired properties is key to advancing cell fate conversions with artificially evolved biomolecules.
Persistent Identifierhttp://hdl.handle.net/10722/298741
ISSN
2023 Impact Factor: 11.0
2023 SCImago Journal Rankings: 4.061
PubMed Central ID
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorTAN, DS-
dc.contributor.authorChen, Y-
dc.contributor.authorGAO, Y-
dc.contributor.authorBednarz, A-
dc.contributor.authorWei, Y-
dc.contributor.authorMalik, V-
dc.contributor.authorHo, DHH-
dc.contributor.authorWENG, M-
dc.contributor.authorHO, SY-
dc.contributor.authorSrivastava, Y-
dc.contributor.authorVelychko, S-
dc.contributor.authorYang, X-
dc.contributor.authorFan, L-
dc.contributor.authorKim, J-
dc.contributor.authorGraumann, J-
dc.contributor.authorStormo, GD-
dc.contributor.authorBraun, T-
dc.contributor.authorYan, J-
dc.contributor.authorSchöler, HR-
dc.contributor.authorJauch, R-
dc.date.accessioned2021-04-12T03:02:44Z-
dc.date.available2021-04-12T03:02:44Z-
dc.date.issued2021-
dc.identifier.citationMolecular Biology and Evolution, 2021, v. 38 n. 7, p. 2854-2868-
dc.identifier.issn0737-4038-
dc.identifier.urihttp://hdl.handle.net/10722/298741-
dc.description.abstractTranscription factor-driven cell fate engineering in pluripotency induction, transdifferentiation, and forward reprogramming requires efficiency, speed, and maturity for widespread adoption and clinical translation. Here, we used Oct4, Sox2, Klf4, and c-Myc driven pluripotency reprogramming to evaluate methods for enhancing and tailoring cell fate transitions, through directed evolution with iterative screening of pooled mutant libraries and phenotypic selection. We identified an artificially evolved and enhanced POU factor (ePOU) that substantially outperforms wild-type Oct4 in terms of reprogramming speed and efficiency. In contrast to Oct4, not only can ePOU induce pluripotency with Sox2 alone, but it can also do so in the absence of Sox2 in a three-factor ePOU/Klf4/c-Myc cocktail. Biochemical assays combined with genome-wide analyses showed that ePOU possesses a new preference to dimerize on palindromic DNA elements. Yet, the moderate capacity of Oct4 to function as a pioneer factor, its preference to bind octamer DNA and its capability to dimerize with Sox2 and Sox17 proteins remain unchanged in ePOU. Compared with Oct4, ePOU is thermodynamically stabilized and persists longer in reprogramming cells. In consequence, ePOU: 1) differentially activates several genes hitherto not implicated in reprogramming, 2) reveals an unappreciated role of thyrotropin-releasing hormone signaling, and 3) binds a distinct class of retrotransposons. Collectively, these features enable ePOU to accelerate the establishment of the pluripotency network. This demonstrates that the phenotypic selection of novel factor variants from mammalian cells with desired properties is key to advancing cell fate conversions with artificially evolved biomolecules.-
dc.languageeng-
dc.publisherOxford University Press, published in association with Society for Molecular Biology and Evolution. The Journal's web site is located at http://mbe.oxfordjournals.org/-
dc.relation.ispartofMolecular Biology and Evolution-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectreprogramming-
dc.subjectprotein engineering-
dc.subjectPOU-
dc.subjectcell fate conversion-
dc.subjectmolecular evolution-
dc.titleDirected evolution of an enhanced POU reprogramming factor for cell fate engineering-
dc.typeArticle-
dc.identifier.emailHo, DHH: boderek@hku.hk-
dc.identifier.emailJauch, R: ralf@hku.hk-
dc.identifier.authorityJauch, R=rp02383-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1093/molbev/msab075-
dc.identifier.pmid33720298-
dc.identifier.pmcidPMC8233511-
dc.identifier.scopuseid_2-s2.0-85109117541-
dc.identifier.hkuros322056-
dc.identifier.volume38-
dc.identifier.issue7-
dc.identifier.spage2854-
dc.identifier.epage2868-
dc.identifier.isiWOS:000671060500014-
dc.publisher.placeUnited States-

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