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Updated: Jun 15, 2025

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
Published on: September 17, 2017
1H, 15N and 13C resonance assignments of eggcase silk protein 3
Shuixin Yu1, Ruiqi Qin1, Wensu Yuan1
1School of Life Sciences, Tianjin University, Tianjin, 300072, P.R. China.
Abstract:
Spider silk is a high-performance biomaterial known for its outstanding combination of strength and flexibility. Among the six distinct types of spider silk, eggcase silk stands out as it is exclusively produced from the tubuliform gland, playing a specialized role in offspring protection. In the spider species Latrodectus hesperus, eggcase silk is spun from a large spidroin complex, including the major silk component tubuliform spidroin 1 (TuSp1) and at least six different minor silk components. One of these minor components is eggcase protein 3 (ECP3), a small silk protein of 11.8 kDa that lacks the typical spidroin architecture. ECP3 shows very limited homology to all known spidroins. In this study, we report nearly complete backbone and side-chain resonance assignments of ECP3 as a basis for studying the structural mechanisms involved in eggcase silk formation.
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