CCMB Scientists Discover Rare Gene Linked to Indian Girl’s Red Hair

In a notable discovery, researchers at the CSIR-Centre for Cellular and Molecular Biology (CCMB) in Hyderabad have identified a rare case of red hair in a five-year-old Indian girl, indicating the presence of an unusual MC1R gene variant (c.872C>A). This variant disrupts melanin production, leading to red hair, which is exceedingly rare among Indians, whose typical hair color ranges from black to dark brown. The child inherited two copies of the variant, one from each parent, while her parents, carrying only one copy each, exhibited typical dark hair.

The study conducted by the CCMB analyzed over 11,000 individuals from 91 distinct populations across India, uncovering 21 novel or ultra-rare MC1R variants and revealing an unexpected genetic diversity within the country. Researchers employed genome sequencing to confirm their findings, which highlight the complex relationship between genetics and physical traits like hair and skin pigmentation. Furthermore, a second variant linked to skin pigmentation (c.-226A>T) was explored, showing varying frequencies across different Indian populations, with higher instances among northern communities compared to Dravidian tribal groups in the south.

This research underscores the intricate genetic tapestry of India, shaped by historical migrations and social practices such as endogamy. The findings not only provide insights into the genetic underpinnings of physical characteristics but also carry clinical implications, as variants in the MC1R gene are associated with increased susceptibility to skin cancers, including melanoma. The study emphasizes that while genes like MC1R play a significant role in pigmentation, multiple genes are involved, reflecting the country’s diverse range of skin tones influenced by genetic ancestry and environmental factors.