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Article Dans Une Revue Plant Science Année : 2005

Dividing maize tissues show preferential expression of two novel receptor-like cytoplasmic protein kinases

Résumé

Two novel members of the receptor-like protein kinase (RLK) family were isolated from maize embryos by homology to ZmPK1, the first RLK identified in the plant kingdom. PK8-a and PK8-b share 88% sequence identity and code for deduced proteins with molecular masses of 57.3 and 56.6 K, respectively. The proteins contain a trans-membrane domain close to the N-terminus and a kinase domain at the C-terminal end. Despite the absence of an extracellular domain they phylogenetically belong to the RLK family where they fall into one of the receptorlike cytoplasmic kinase (RLCK) clades. The RT-PCR and in situ expression profiles reveal an ubiquitous expression with a preference for young, actively dividing tissues and suggest a role in a particular phase of the cell cycle. PK&A -and PK8-b are likely functionally redundant because insertional mutants of PK8-a did not exhibit any major phenotype despite a strong reduction in PK8-a transcript levels. (c) 2005 Elsevier Ireland Ltd. All rights reserved.

Dates et versions

hal-00188829 , version 1 (19-11-2007)

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Abdel-Sabour Khaled, Erwan Ledeunff, Gwyneth Ingram, Robert Meeley, Peter Rogowsky. Dividing maize tissues show preferential expression of two novel receptor-like cytoplasmic protein kinases. Plant Science, 2005, 169 (169), pp.587-598. ⟨10.1016/j.plantsci.2005.05.011⟩. ⟨hal-00188829⟩
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