A previously unknown maltose transporter essential for starch degradation in leaves.
Science
; 303(5654): 87-9, 2004 Jan 02.
Article
en En
| MEDLINE
| ID: mdl-14704427
ABSTRACT
A previously unknown maltose transporter is essential for the conversion of starch to sucrose in Arabidopsis leaves at night. The transporter was identified by isolating two allelic mutants with high starch levels and very high maltose, an intermediate of starch breakdown. The mutations affect a gene of previously unknown function, MEX1. We show that MEX1is a maltose transporter that is unrelated to other sugar transporters. The severe mex1 phenotype demonstrates that MEX1is the predominant route of carbohydrate export from chloroplasts at night. Homologous genes in plants including rice and potato indicate that maltose export is of widespread significance.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Almidón
/
Proteínas de Transporte de Monosacáridos
/
Arabidopsis
/
Hojas de la Planta
/
Proteínas de Arabidopsis
/
Maltosa
Idioma:
En
Revista:
Science
Año:
2004
Tipo del documento:
Article
País de afiliación:
Reino Unido