New York, Jan 18: Scientists have revealed the three-dimensiol (3D) structure of an anti-ageing protein, that may not only increase human lifespan but also help develop therapies for age-related diseases such as diabetes, obesity and cancers. The Klotho proteins — alpha and beta — med after the Greek goddess Clotho, who spun the thread of life, play an important role in the regulation of longevity and metabolism.