Lasp‐1 (MLN 50) defines a new LIM protein subfamily characterized by the association of LIM and SH3 domains

Abstract
MLN 50 was previously identified in a cDNA library of breast cancer metastasis. In this study, we show that MLN 50, which is expressed at a basal level in normal tissues, is overexpressed in 8% of human breast carcinomas most often together with c‐erbB‐2. MLN 50 cDNA encodes a putative protein of 261 residues, named Lasp‐1 (IM and H3 protein) since it contains a LIM motif and a domain of Src homology region 3 (SH3) at the amino‐ and the C‐terminal parts of the protein, respectively. Thus, Lasp‐1 defines a new LIM protein subfamily.