Leptin is a four-helix bundle: secondary structure by NMR
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Updated: Nov 1, 2026

Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
Published on: November 21, 2013
A D Kline1, G W Becker, L M Churgay
1Lilly Research Laboratories, Lilly Corporate Center, Indianapolis, IN 48285-0403, USA. a.kline@lilly.com
Abstract:
Leptin is a signaling protein that in its mutant forms has been associated with obesity and Type II diabetes. The lack of sequence similarity has precluded analogies based on structural resemblance to known systems. Backbone NMR signals for mouse leptin (13C/15N -labeled) have been assigned and its secondary structure reveals it to be a four-helix bundle cytokine. Helix lengths and disulfide pattern are in agreement with leptin as a member of the short-helix cytokine family. A three-dimensional model was built verifying the mechanical consistency of the identified elements with a short-helix cytokine core.
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