LIM and senescent cell antigen-like-containing domain protein 1 (LIMS1)

LIM and senescent cell antigen-like-containing domain protein 1 (LIMS1, also known as PINCH or PINCH1) is an adaptor protein characterized by five LIM domains, which are double zinc finger motifs involved in protein-protein interactions[1][3][9]. LIMS1 is a crucial component of focal adhesion sites, where it regulates integrin-mediated signal transduction by linking integrin-linked kinase (ILK) to other adaptor proteins such as NCK2 and parvin, thereby forming the ILK–PINCH–Parvin (IPP) complex[1][2][3][6]. This complex is essential for cytoskeletal architecture, cell adhesion, spreading, and migration[1][3][4][6]. LIMS1 functions across diverse tissues and is indispensable for normal tissue development and maintenance; for example, its genetic deletion in mice leads to severe developmental and tissue-specific abnormalities, notably in the skin and skeletal system[4][6]. LIMS1 also plays roles in cell proliferation, differentiation, and survival, and has been implicated in the regulation of TGF-β/Smad signaling and in the development or progression of several diseases, including colorectal cancer and anemias[3][6][9]. No drugs specifically targeting LIMS1 are currently identified for clinical use, and thus mechanisms of action, biomarkers, or safety concerns specific to LIMS1-targeting therapeutics have not been established in the available literature.

Other names

PINCHPINCH1PINCH-1Particularly interesting new Cys-His protein 1Renal carcinoma antigen NY-REN-48Senescent cell antigen