Xarvcf, Xenopus member of the p120 catenin subfamily associating with cadherin juxtamembrane region.
The catenin ARVCF is a member of the p120(ctn) subfamily of Armadillo proteins. A number of catenins directly bind cadherin cytoplasmic tails, contributing to the modulation of cell-cell adhesion and motility processes. Some catenins, such as beta-catenin (and likely p120(ctn)), have additional roles within signaling pathways regulating gene transcription. We have isolated the Xenopus homolog of human ARVCF. Utilizing the cadherin membrane proximal region known to bind p120(ctn) and delta-catenin, coimmunoprecipitation experiments demonstrate that Xarvcf, likewise, binds cadherin in this region and that corresponding point mutations within conserved residues abrogate the Xarvcf-cadherin association. Western blot analysis of Xarvcf protein across a series of developmental stages reveals changes in protein mobility, likely due to changes in phosphorylation. Xarvcf is a maternally provided transcript and expressed in the embryo throughout all stages of development. Interestingly, Xarvcf mRNA is differentially spliced to produce several isoforms, one of which is developmentally regulated. In common with the putative post-translational modifications of the Xarvcf protein, the presence of alternative splice isoforms suggests that Xarvcf possesses the capacity to effect developmental functions in a regulatable manner.
Paulson
A F
AF
Department of Biochemistry and Molecular Biology, Program in Genes and Development, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
Mooney
E
E
Fang
X
X
Ji
H
H
McCrea
P D
PD
D017398:Alternative Splicing; D000595:Amino Acid Sequence; D000818:Animals; D051186:Armadillo Domain Proteins; D001665:Binding Sites; D015820:Cadherins / Q000378:metabolism*; D051177:Catenins; D015815:Cell Adhesion Molecules / Q000235:genetics / Q000378:metabolism*; D003001:Cloning, Molecular; D019281:Dimerization; D005775:Gastrula; D015723:Gene Library; D008969:Molecular Sequence Data; D010750:Phosphoproteins / Q000235:genetics / Q000378:metabolism*; D011485:Protein Binding; D020033:Protein Isoforms; D014158:Transcription, Genetic; D014981:Xenopus / Q000196:embryology / Q000235:genetics*; D029867:Xenopus Proteins; D000095002:Delta Catenin
D051186:Armadillo Domain Proteins; D015820:Cadherins; D051177:Catenins; D015815:Cell Adhesion Molecules; D010750:Phosphoproteins; D020033:Protein Isoforms; D029867:Xenopus Proteins; C485847:arvcf protein, Xenopus; D000095002:Delta Catenin