LIM domains-containing protein 1 (LIMD1), a tumor suppressor encoded at chromosome 3p21.3, binds pRB and represses E2F-driven transcription.
basic_science · Level V
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- Record sourced from PubMed, PMID 15542589.
- Also identified by PMC identifier 534532.
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Abstract
LIM domains-containing protein 1 (LIMD1) is encoded at chromosome 3p21.3, a region commonly deleted in many solid malignancies. However, the function of LIMD1 is unknown. Here we show that LIMD1 specifically interacts with retinoblastoma protein (pRB), inhibits E2F-mediated transcription, and suppresses the expression of the majority of genes with E2F1-responsive elements. LIMD1 blocks tumor growth in vitro and in vivo and is down-regulated in the majority of human lung cancer samples tested. Our data indicate that LIMD1 is a tumor-suppressor gene, the protein product of which functionally interacts with pRB and the loss of which promotes lung carcinogenesis.
Medical subject headings
- Carrier Proteins
- Chromosomes, Human, Pair 3
- Genes, Tumor Suppressor
- Retinoblastoma Protein
- Tumor Suppressor Proteins