Phototropin Interactions with SUMO Proteins.
Arabidopsis
/ genetics
Arabidopsis Proteins
/ genetics
Chloroplasts
/ metabolism
Escherichia coli
/ genetics
Ligases
/ genetics
Lysine
/ metabolism
Mutation
Phototropism
/ genetics
Plant Leaves
/ genetics
Plants, Genetically Modified
Protein Serine-Threonine Kinases
/ genetics
Seedlings
/ genetics
Small Ubiquitin-Related Modifier Proteins
/ genetics
Sumoylation
Arabidopsis
Blue light
Chloroplast movements
Phototropin
Phototropism
Sumoylation
Journal
Plant & cell physiology
ISSN: 1471-9053
Titre abrégé: Plant Cell Physiol
Pays: Japan
ID NLM: 9430925
Informations de publication
Date de publication:
24 Sep 2021
24 Sep 2021
Historique:
received:
10
08
2020
accepted:
10
02
2021
pubmed:
18
2
2021
medline:
21
10
2021
entrez:
17
2
2021
Statut:
ppublish
Résumé
The disruption of the sumoylation pathway affects processes controlled by the two phototropins (phots) of Arabidopsis thaliana, phot1 and phot2. Phots, plant UVA/blue light photoreceptors, regulate growth responses and fast movements aimed at optimizing photosynthesis, such as phototropism, chloroplast relocations and stomatal opening. Sumoylation is a posttranslational modification, consisting of the addition of a SUMO (SMALL UBIQUITIN-RELATED MODIFIER) protein to a lysine residue in the target protein. In addition to affecting the stability of proteins, it regulates their activity, interactions and subcellular localization. We examined physiological responses controlled by phots, phototropism and chloroplast movements, in sumoylation pathway mutants. Chloroplast accumulation in response to both continuous and pulse light was enhanced in the E3 ligase siz1 mutant, in a manner dependent on phot2. A significant decrease in phot2 protein abundance was observed in this mutant after blue light treatment both in seedlings and mature leaves. Using plant transient expression and yeast two-hybrid assays, we found that phots interacted with SUMO proteins mainly through their N-terminal parts, which contain the photosensory LOV domains. The covalent modification in phots by SUMO was verified using an Arabidopsis sumoylation system reconstituted in bacteria followed by the mass spectrometry analysis. Lys 297 was identified as the main target of SUMO3 in the phot2 molecule. Finally, sumoylation of phot2 was detected in Arabidopsis mature leaves upon light or heat stress treatment.
Identifiants
pubmed: 33594440
pii: 6140784
doi: 10.1093/pcp/pcab027
pmc: PMC8462379
doi:
Substances chimiques
Arabidopsis Proteins
0
PHOT2 protein, Arabidopsis
0
SUM1 protein, Arabidopsis
0
SUM2 protein, Arabidopsis
0
Small Ubiquitin-Related Modifier Proteins
0
NPH1 protein, Arabidopsis
EC 2.7.11.1
Protein Serine-Threonine Kinases
EC 2.7.11.1
Ligases
EC 6.-
SIZ1 protein, Arabidopsis
EC 6.3.2.-
Lysine
K3Z4F929H6
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
693-707Subventions
Organisme : The Polish National Science Centre
ID : UMO-2011/01/B/NZ3/02160 to H.G.
Organisme : European Regional Development Fund
ID : POIG.02.01.00-12-167/08
Organisme : Excellence Initiative -Research University
Informations de copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of Japanese Society of Plant Physiologists.
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