Identification, expression analysis, genomic organization and cellular location of a novel protein with a RhoGEF domain

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Department of Cell Biology; Shriver Center

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Amino Acid Sequence; Animals; Blood Proteins; Blotting, Northern; Blotting, Western; Brain; Carrier Proteins; Cell Line; Cell Line, Tumor; Cloning, Molecular; Cytoplasm; DNA, Complementary; Exons; *Gene Expression Profiling; Guanine Nucleotide Exchange Factors; Humans; Immunohistochemistry; Immunoprecipitation; Introns; Male; Mice; Molecular Sequence Data; Phosphoproteins; Protein Binding; RNA, Messenger; Rats; Reverse Transcriptase Polymerase Chain Reaction; Saccharomyces cerevisiae; Sequence Alignment; Sequence Analysis, DNA; Sequence Homology, Amino Acid; Two-Hybrid System Techniques; tau Proteins


Cell Biology


In this study we describe the identification and characterization of a novel cytosolic protein of the guanine exchange factor (GEF) family. The human cDNA corresponds to predicted human protein FLJ00128/FLJ10357 located on chromosome 14q11.2. The deduced protein sequence contains in its C-terminus a RhoGEF domain followed by a pleckstrin domain. Its N-terminus, central region and RhoGEF/pleckstrin domain are homologous to the recently identified zebrafish Quattro protein, which is involved in morphogenetic movements mediated by the actin cytoskeleton. Based on the homology of our protein's RhoGEF domain to the RhoGEF domains of Trio, Duo and Duet and its homology with Quattro, we named it Solo. The Solo mRNA is ubiquitously expressed but enriched in brain, its expression peaks perinatally and it undergoes extensive alternative splicing. In both myoblasts and neuroblastoma cells, the Solo protein is concentrated around the nucleus.

DOI of Published Version



Gene. 2005 Oct 10;359:63-72. Link to article on publisher's site

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