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Biochem J. 2000 Nov 15;352 Pt 1:183-90.

Lentil seed aquaporins form a hetero-oligomer which is phosphorylated by a Mg(2+)-dependent and Ca(2+)-regulated kinase.

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  • 1Laboratoire de Physiologie Végétale, CP 206/2, Faculté des Sciences, Université Libre de Bruxelles, Bld du Triomphe, B-1050 Brussels, Belgium.

Abstract

In plants, aquaporins regulate the water flow through membranes during growth, development and stress responses. We have isolated two isoforms of the aquaporin family from the protein-storage vacuoles of lentil (Lens culinaris Med.) seeds. Chemical cross-linking experiments showed that both isoforms belong to the same oligomer in the membrane and are phosphorylated by a membrane-bound protein kinase. We assigned the kinase activity to a 52 kDa protein that is magnesium-dependent and calcium-regulated.

PMID:
11062071
[PubMed - indexed for MEDLINE]
PMCID:
PMC1221445
Free PMC Article
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