A variant limb deformity transcript expressed in the embryonic mouse limb defines a novel formin.
The formins constitute a set of protein isoforms encoded by the alternatively spliced transcripts arising from the limb deformity (ld) locus of the mouse. Mutations in this locus disrupt formation of the anteroposterior axis of the embryonic limb. Although ld transcripts are widely expressed during embryogenesis, we have identified a novel transcript that is expressed in the mesenchyme and apical ectodermal ridge of the developing limb. This pattern of expression coincides with the earliest morphological defects observed in ld mutant limb buds. Moreover, the formin encoded by this transcript bears a highly acidic amino terminus, as distinguished from the basic amino terminus encoded by other ld transcripts suggesting that it may have a distinct biochemical function.
Jackson-Grusby
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L
Howard Hughes Medical Institute, Boston, Massachusetts.
Kuo
A
A
Leder
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P
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D015152:Blotting, Northern; D003001:Cloning, Molecular; D005314:Embryonic and Fetal Development / Q000235:genetics*; D005121:Extremities / Q000196:embryology*; D005326:Fetal Proteins / Q000235:genetics*; D000080865:Formins; D015870:Gene Expression; D005796:Genes / Q000235:genetics; D051379:Mice; D008840:Microfilament Proteins; D008969:Molecular Sequence Data; D009024:Morphogenesis / Q000235:genetics; D009687:Nuclear Proteins; D009693:Nucleic Acid Hybridization; D016133:Polymerase Chain Reaction; D012326:RNA Splicing / Q000235:genetics
D005326:Fetal Proteins; D000080865:Formins; D008840:Microfilament Proteins; D009687:Nuclear Proteins