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LIMK1 gene
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Gene

LIMK1 gene

The LIMK1 gene provides instructions for a protein that regulates the cytoskeleton and is involved in the growth and development of nerve cells in the brain.

Normal Function

The LIMK1 gene provides instructions for making a protein that is highly active in the brain, where it is thought to be involved in the growth and development of nerve cells. Studies suggest that this protein may play an important role in areas of the brain that are responsible for processing visual-spatial information (visuospatial constructive cognition). These parts of the brain are important for visualizing an object as a set of parts and performing tasks such as writing, drawing, constructing models, and assembling puzzles.

Within cells, the LIMK1 protein likely regulates aspects of the cytoskeleton, the structural framework that helps to determine cell shape, size, and movement. The LIMK1 protein helps control the organization of actin filaments, which are long, thin fibers that are part of the cytoskeleton. Actin filaments are necessary for several normal cellular functions, such as cell division, cell movement (motility), maintenance of cell shape, transport of proteins and other molecules within cells, and chemical signaling between cells.

Health Conditions Related to Genetic Changes

Williams syndrome

The LIMK1 gene is located in a region of chromosome 7 that is deleted in people with Williams syndrome, which is a developmental disorder characterized by mild to moderate intellectual disability or learning problems, unique personality characteristics, distinctive facial features, and heart and blood vessel (cardiovascular) problems. As a result of the deletion, people with Williams syndrome are missing one copy of the LIMK1 gene in each cell. Some studies suggest that a loss of this gene contributes to the characteristic problems with visual-spatial tasks (such as writing and drawing) seen in Williams syndrome; however, other studies have not found this connection. Researchers are working to determine how a reduction in the amount of LIMK1 protein could be related to the specific impairments seen in Williams syndrome.

Cancers

The LIMK1 protein is produced at unusually high levels (overexpressed) in some cancerous tumors. For example, increased amounts of this protein have been found in a form of skin cancer called melanoma and in ovarian cancer, breast cancer, lung cancer, and prostate cancer. Researchers believe that high levels of the LIMK1 protein may be associated with changes in the organization of actin filaments and an increased chance that a tumor will invade other tissues.

Other Names for This Gene

  • LIM kinase
  • LIM kinase 1
  • LIM motif-containing protein kinase
  • LIMK
  • LIMK-1
  • LIMK1_HUMAN

Frequently Asked Questions

Yes. Chromosomal microarray or targeted deletion/duplication analysis can detect the 7q11.23 deletion that includes LIMK1. Knowing the deletion confirms the diagnosis of Williams syndrome, guides surveillance for associated heart, vascular, and developmental issues, and informs family counseling about recurrence risk.
The LIMK1 deletion in Williams syndrome is usually a de novo event, meaning it occurs spontaneously in the child’s chromosomes. The recurrence risk for parents who do not carry the deletion is low (<1%). If a parent is found to carry the same deletion (rare), the risk of passing it to each child is 50%. Genetic counseling is recommended for precise risk assessment.
The loss of one copy of LIMK1 is thought to contribute to the visual‑spatial deficits seen in Williams syndrome, such as trouble assembling puzzles, drawing, or visualizing objects, because LIMK1 helps shape brain regions that process spatial information. However, the overall phenotype results from the combined effect of several genes deleted in the syndrome, not LIMK1 alone.
Most individuals with a heterozygous LIMK1 deletion have Williams‑type features because the deletion is usually part of a larger 7q11.23 loss. Isolated LIMK1 deletions without the surrounding region are rare, and their clinical impact is not well defined. If a deletion is found, clinicians typically monitor neurodevelopment, cardiac status, and learning abilities even if symptoms are mild.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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