The COBRA Family of Putative GPI-Anchored Proteins in Arabidopsis. A New Fellowship in Expansion

Oxford University Press (OUP) - Tập 130 Số 2 - Trang 538-548 - 2002
François Roudier1, Gary Schindelman1, Rob DeSalle2, Philip N. Benfey1
1Department of Biology, New York University, New York, New York 10003 (F.R., G.S., P.N.B.); and
2Division of Invertebrates, American Museum of Natural History, New York, New York (R.D.)

Tóm tắt

Abstract Identification of regulatory molecules that determine the extent and direction of expansion is necessary to understand how cell morphogenesis is controlled in plants. We recently identifiedCOB (COBRA) as a key regulator of the orientation of cell expansion in the root. Analysis of the Arabidopsis genome sequence indicated that COB belongs to a multigene family consisting of 12 members, all predicted to encode glycosylphosphatidylinositol-anchored proteins. All but two of theCOBL (COB-like) genes are expressed in most organs examined, suggesting possible redundancy. Sequence comparisons, phylogenetic analyses, and exon-intron positions revealed that the COB family is composed of two main subgroups sharing a common architecture, one subgroup being characterized by an additional N-terminal domain. Identification of expressed sequence tags corresponding to potential orthologs in other plant species suggested that COB-related functions are required in all vascular plants. Together, these results indicate that COB family members are likely to be important new players at the plasma membrane-cell wall interface.

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Oxford University Press (OUP)

Tập 130 Số 2

538-548

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