Journal
PLANTS-BASEL
Volume 10, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/plants10020196
Keywords
plastid; tetrapyrrole; heme; chloroplast; retrograde signaling; gun mutants
Categories
Funding
- JSPS KAKENHI [JP20K06681, JP18K14650, JP18H03941, JP19H03241]
Ask authors/readers for more resources
Chloroplast biogenesis relies on coordinated expression of chloroplast and nuclear genomes. Retrograde signals emitted from plastids control nuclear gene expression, with gun mutants playing a role in this pathway.
Chloroplast biogenesis requires the coordinated expression of the chloroplast and nuclear genomes, which is achieved by communication between the developing chloroplasts and the nucleus. Signals emitted from the plastids, so-called retrograde signals, control nuclear gene expression depending on plastid development and functionality. Genetic analysis of this pathway identified a set of mutants defective in retrograde signaling and designated genomes uncoupled (gun) mutants. Subsequent research has pointed to a significant role of tetrapyrrole biosynthesis in retrograde signaling. Meanwhile, the molecular functions of GUN1, the proposed integrator of multiple retrograde signals, have not been identified yet. However, based on the interactions of GUN1, some working hypotheses have been proposed. Interestingly, GUN1 contributes to important biological processes, including plastid protein homeostasis, through transcription, translation, and protein import. Furthermore, the interactions of GUN1 with tetrapyrroles and their biosynthetic enzymes have been revealed. This review focuses on our current understanding of the function of tetrapyrrole retrograde signaling on chloroplast biogenesis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available