Ubiquitin facilitates a quality-control pathway that removes damaged chloroplasts

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Science  23 Oct 2015:
Vol. 350, Issue 6259, pp. 450-454
DOI: 10.1126/science.aac7444

Quality control one chloroplast at a time

How do plant cells get rid of chloroplasts that are not working as they should? Woodson et al. describe a chloroplast quality-control pathway that allows for the selective elimination of individual chloroplasts. Damage by reactive oxygen species during photosynthesis is recognized by a ubiquitin ligase, which marks out damaged chloroplasts for degradation. The findings reveal how cells balance inherently stressful energy production with organelle turnover.

Science, this issue p. 450