EPISODE · Aug 22, 2026 · 25 MIN
1472-人眼视锥蛋白活化态的冷冻电镜结构研究
from 聊聊Sci
这项研究通过冷冻电子显微镜技术，首次揭示了人类三种视锥细胞（红、绿、蓝）视蛋白在活跃状态下的高分辨率分子结构。研究详细对比了长波（LWS）、中波（MWS）和短波（SWS）敏感视蛋白与视紫红质之间的结构差异，揭示了它们在光谱调谐和电荷稳定机制上的独特性。科学家发现SWS视蛋白具有独特的二硫键和丝氨酸环结构，这解释了其对蓝光敏感的物理基础。此外，该成果通过模拟氨基酸变异，阐明了导致色盲及相关视觉障碍的分子机理。这些结构发现不仅完善了人类对三色视觉形成过程的理解，也为治疗视网膜疾病提供了重要的理论框架。References:Peng Q, Li J, Jiang H, et al. Cryo–electron microscopy structures of human cone visual pigments[J]. Science, 2026, 392(6805): eadz8141.前往小宇宙评论区与主播互动
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1472-人眼视锥蛋白活化态的冷冻电镜结构研究
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