The abstract is read at the publisher; the summary is JClub's.
Loss of HDAC1/2 in Chlamydomonas reinhardtii alleviates growth inhibition and reduces cell death after ClpP1 depletion, linking chloroplast proteostasis signaling to nuclear chromatin control.
- Why it matters: Chloroplast stress triggers retrograde signaling that changes nuclear transcription, but the chromatin mechanisms integrating these signals are unclear.
- What they did: A genetic suppressor screen in a conditional ClpP1-depletion mutant identified HDAC1/2; HDAC1/2 loss was tested for stress phenotypes and for effects on transcription and histone H4 acetylation.
- The result: HDAC1/2 deficiency increased tolerance to high-light, oxidative, and endoplasmic reticulum stresses and to chloroplast translation inhibition, coinciding with higher H2O2, HDAC1/2 accumulation, disrupted ClpP1-depletion transcription, and increased histone H4 acetylation.
The findingWhy it mattersWhat they didThe result
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