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Histone monoaminylation dynamics are regulated by a single enzyme and promote neural rhythmicity

ABSTRACT: Histone monoaminylation dynamics are regulated by a single enzyme and promote neural rhythmicity

PROVIDER: PRJNA862551 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR20656800.fastq.gz	Fastqsanger.gz
	SRR20656801.fastq.gz	Fastqsanger.gz
	SRR20656802.fastq.gz	Fastqsanger.gz
	SRR20656803.fastq.gz	Fastqsanger.gz
	SRR20656804.fastq.gz	Fastqsanger.gz

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Histone monoaminylation dynamics are regulated by a single enzyme and promote neural rhythmicity

Project description:Histone H3 monoaminylations at glutamine(Q) 5 represent important epigenetic markers in neurons that play critical roles in the mediation of permissive gene expression. We previously demonstrated that H3Q5 serotonylation(ser) and dopaminylation(dop) are catalyzed by the Transglutaminase 2 (TGM2) enzyme. Here, we identified a new class of histone monoaminylation, H3Q5 histaminylation(his), which displayed dynamic diurnal expression in brain and contributed to neural rhythmicity. We found that H3Q5his, unlike H3Q5ser, electrostatically inhibited recruitment of the “reader” protein WDR5 and attenuated MLL1 methyltransferase activity on H3 lysine(K) 4. We determined that H3Q5 monoaminylation dynamics are dictated by local monoamine concentrations, which are sensed by TGM2. This noncanonical mechanism indicated that histone monoaminylations can be established and removed by a single enzyme based upon its sensing of cellular microenvironments.

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Histone monoaminylation dynamics are regulated by a single enzyme and promote neural rhythmicity

Project description:Histone H3 monoaminylations at glutamine(Q) 5 represent an important family of epigenetic markers in neurons that play critical roles in the mediation of permissive gene expression (1, 2). We previously demonstrated that H3Q5 serotonylation(ser) and dopaminylation(dop) are catalyzed by the Transglutaminase 2 (TGM2) enzyme and alter both local and global chromatin states (3, 4). Here, we found that TGM2 additionally functions as an “eraser” of H3 monoaminylations that is capable of “re-writing” these epigenetic marks in cells, including a new class of this modification, H3Q5 histaminylation(his), which displays dynamic diurnal expression in brain and contributes to neural rhythmicity. We found that H3Q5his inhibits binding of the MLL1 complex to the H3 N-terminus and attenuates its methyltransferase activity on H3 lysine(K) 4. We determined that H3Q5 monoaminylation dynamics are dictated by local monoamine concentrations, which are utilized by TGM2. Taken together, we present here a novel mechanism through which a single chromatin regulatory enzyme is capable of sensing chemical microenvironments to affect the epigenetic states of cells.

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Histone monoaminylation dynamics are regulated by a single enzyme and promote neural rhythmicity

Project description:Histone H3 monoaminylations at glutamine(Q) 5 represent an important family of epigenetic markers in neurons that play critical roles in the mediation of permissive gene expression (1, 2). We previously demonstrated that H3Q5 serotonylation(ser) and dopaminylation(dop) are catalyzed by the Transglutaminase 2 (TGM2) enzyme and alter both local and global chromatin states (3, 4). Here, we found that TGM2 additionally functions as an “eraser” of H3 monoaminylations that is capable of “rewriting” these epigenetic marks in cells, including a new class of this modification, H3Q5 histaminylation(his), which displays dynamic diurnal expression in brain and contributes to neural rhythmicity. We found that H3Q5his inhibits binding of the MLL1 complex to the H3 N-terminus and attenuates its methyltransferase activity on H3 lysine(K) 4. We determined that H3Q5 monoaminylation dynamics are dictated by local monoamine concentrations, which are utilized by TGM2. Taken together, we present here a novel mechanism through which a single chromatin regulatory enzyme is capable of sensing chemical microenvironments to affect the epigenetic states of cells.

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