Ca2+ -Calmodulin regulates nuclear translocation of the rice seed-specific MADS-box transcription factor OsMADS29.
FEBS J
; 290(14): 3595-3613, 2023 07.
Article
en En
| MEDLINE
| ID: mdl-36861329
OsMADS29 (M29) is a crucial regulator of seed development in rice. The expression of M29 is strictly regulated at transcriptional as well as post-transcriptional levels. The MADS-box proteins are known to bind to DNA as dimers. However, in the case of M29, the dimerization also plays a vital role in its localization into the nucleus. The factor(s) that affect oligomerization and nuclear transport of MADS proteins have not yet been characterized. By using BiFC in transgenic BY-2 cell lines and Yeast-2-hybrid assay (Y2H), we show that calmodulin (CaM) interacts with M29 in a Ca2+ -dependent manner. This interaction specifically takes place in the cytoplasm, probably in association with the endoplasmic reticulum. By generating domain-specific deletions, we show that both sites in M29 are involved in this interaction. Further, by using BiFC-FRET-FLIM, we demonstrate that CaM may also help in the dimerization of two M29 monomers. Since most MADS proteins have CaM binding domains, the interaction between these proteins could be a general regulatory mechanism for oligomerization and nuclear transport.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Oryza
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Idioma:
En
Revista:
FEBS J
Asunto de la revista:
BIOQUIMICA
Año:
2023
Tipo del documento:
Article
País de afiliación:
India
Pais de publicación:
Reino Unido