ARID1B

ARID1B is a gene that encodes a member of the ARID (AT-rich interaction domain) family of DNA-binding proteins. The ARID1B protein is a key component of the SWI/SNF chromatin remodeling complex, which plays a crucial role in gene expression and DNA repair. Mutations in the ARID1B gene are associated with several neurodevelopmental disorders, including Coffin-Siris syndrome and intellectual disability.

Function

The ARID1B protein is involved in the regulation of transcription, the process by which genetic information is copied from DNA to RNA. It does this by altering the structure of chromatin, the material within cells that packages DNA and controls its activity. By changing the way chromatin is arranged, the ARID1B protein can control which genes are turned on or off.

Clinical significance

Mutations in the ARID1B gene can lead to a variety of neurodevelopmental disorders. These include Coffin-Siris syndrome, a rare genetic disorder characterized by developmental delay, intellectual disability, and distinctive facial features. Other conditions associated with ARID1B mutations include autism spectrum disorder and speech delay.

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Location of the ARID1B gene on chromosome 6

Genetics

The ARID1B gene is located on the long (q) arm of chromosome 6 at position 25.3. It spans more than 20 kilobases and contains 21 exons. The gene is expressed in many tissues, with the highest levels in the brain, heart, and skeletal muscle.

See also

• SWI/SNF
• Coffin-Siris syndrome
• Chromatin remodeling