ABCD4 is a gene that encodes a protein involved in the transport of certain molecules across cell membranes. It is part of the ATP-binding cassette (ABC) transporter family, which plays a crucial role in the movement of various substances, including lipids and drugs, within the body. Mutations in the ABCD4 gene can lead to various health issues, particularly affecting the metabolism of fatty acids. This can result in conditions such as adrenoleukodystrophy, a disorder that impacts the nervous system and adrenal glands. Understanding ABCD4 is important for developing targeted therapies for related diseases.