Keratin genes are responsible for producing keratin, a key structural protein found in hair, skin, and nails. These genes are part of a larger family known as intermediate filament proteins, which provide strength and resilience to various tissues in the body. There are different types of keratin genes, categorized into two main groups: hard keratins, found in hair and nails, and soft keratins, present in skin. The expression of keratin genes is regulated by various factors, including genetic signals and environmental influences. Mutations or alterations in these genes can lead to skin disorders or hair abnormalities, highlighting their importance in maintaining healthy integumentary systems. Understanding keratin genes can also aid in developing treatments for related conditions.