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PMID:15584963

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Citation

Nodzon, LA, Xu, WH, Wang, Y, Pi, LY, Chakrabarty, PK and Song, WY (2004) The ubiquitin ligase XBAT32 regulates lateral root development in Arabidopsis. Plant J. 40:996-1006

Abstract

Ubiquitin-mediated protein modification plays a key role in many cellular signal transduction pathways. The Arabidopsis gene XBAT32 encodes a protein containing an ankyrin repeat domain at the N-terminal half and a RING finger motif. The XBAT32 protein is capable of ubiquitinating itself. Mutation in XBAT32 causes a number of phenotypes including severe defects in lateral root production and in the expression of the cell division marker CYCB1;1::GUS. The XBAT32 gene is expressed abundantly in the vascular system of the primary root, but not in newly formed lateral root primordia. Treatment with auxin increases the expression of XBAT32 in the primary root and partially rescues the lateral root defect in xbat32-1 mutant plants. Thus, XBAT32 is a novel ubiquitin ligase required for lateral root initiation.

Links

PubMed Online version:10.1111/j.1365-313X.2004.02266.x

Keywords

Alleles; Amino Acid Sequence; Arabidopsis/genetics; Arabidopsis/growth & development; Arabidopsis/metabolism; Arabidopsis Proteins/genetics; Arabidopsis Proteins/metabolism; Cyclin B/genetics; Cyclin B/metabolism; Gene Expression Regulation, Developmental; Gene Expression Regulation, Plant; Genetic Complementation Test; Indoleacetic Acids/metabolism; Ligases/metabolism; Molecular Sequence Data; Mutation; Phylogeny; Plant Roots/growth & development; Plant Roots/metabolism; Plants, Genetically Modified; Recombinant Fusion Proteins/genetics; Recombinant Fusion Proteins/metabolism; Ubiquitin-Protein Ligases/genetics; Ubiquitin-Protein Ligases/metabolism

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ARATH:XB32

involved_in

GO:0010311: lateral root formation

ECO:0000315: mutant phenotype evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:XB32

involved_in

GO:0009733: response to auxin

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:XB32

enables

GO:0004842: ubiquitin-protein transferase activity

ECO:0000314: direct assay evidence used in manual assertion

F

Seeded From UniProt

complete

ARATH:XB32

involved_in

GO:0051865: protein autoubiquitination

ECO:0000314: direct assay evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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