Architecture of the chloroplast PSI-NDH supercomplex in Hordeum vulgare.
Nature
; 601(7894): 649-654, 2022 01.
Article
em En
| MEDLINE
| ID: mdl-34879391
ABSTRACT
The chloroplast NADH dehydrogenase-like (NDH) complex is composed of at least 29 subunits and has an important role in mediating photosystem I (PSI) cyclic electron transport (CET)1-3. The NDH complex associates with PSI to form the PSI-NDH supercomplex and fulfil its function. Here, we report cryo-electron microscopy structures of a PSI-NDH supercomplex from barley (Hordeum vulgare). The structures reveal that PSI-NDH is composed of two copies of the PSI-light-harvesting complex I (LHCI) subcomplex and one NDH complex. Two monomeric LHCI proteins, Lhca5 and Lhca6, mediate the binding of two PSI complexes to NDH. Ten plant chloroplast-specific NDH subunits are presented and their exact positions as well as their interactions with other subunits in NDH are elucidated. In all, this study provides a structural basis for further investigations on the functions and regulation of PSI-NDH-dependent CET.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hordeum
/
Arabidopsis
/
Proteínas de Arabidopsis
Idioma:
En
Revista:
Nature
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
China