Faculty of Chemistry and Earth Sciences, Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University Jena, Humboldtstraße 10, 07743, Jena, Germany.
Centre for Biomolecular Magnetic Resonance (BMRZ), Goethe University, Max von Laue Str. 9, 60438, Frankfurt, Germany.
Biomol NMR Assign. 2022 Oct;16(2):289-296. doi: 10.1007/s12104-022-10093-4. Epub 2022 Jun 6.
The mammalian Transient Receptor Potential Vanilloid (TRPV) channels are a family of six tetrameric ion channels localized at the plasma membrane. The group I members of the family, TRPV1 through TRPV4, are heat-activated and exhibit remarkable polymodality. The distal N-termini of group I TRPV channels contain large intrinsically disordered regions (IDRs), ranging from ~ 75 amino acids (TRPV2) to ~ 150 amino acids (TRPV4), the vast majority of which is invisible in the structural models published so far. These IDRs provide important binding sites for cytosolic partners, and their deletion is detrimental to channel activity and regulation. Recently, we reported the NMR backbone assignments of the distal TRPV4 N-terminus and noticed some discrepancies between the extent of disorder predicted solely based on protein sequence and from experimentally determined chemical shifts. Thus, for an analysis of the extent of disorder in the distal N-termini of all group I TRPV channels, we now report the NMR assignments for the human TRPV1, TRPV2 and TRPV3 IDRs.
哺乳动物瞬时受体电位香草醛(TRPV)通道是位于质膜上的六个四聚体离子通道家族。家族中的 I 组成员 TRPV1 到 TRPV4 是热激活的,并表现出显著的多模态性。I 组 TRPV 通道的远端 N 末端包含大的固有无序区域(IDR),范围从约 75 个氨基酸(TRPV2)到约 150 个氨基酸(TRPV4),迄今为止发表的结构模型中绝大多数是不可见的。这些 IDR 为细胞质伴侣提供了重要的结合位点,其缺失对通道活性和调节有害。最近,我们报告了远端 TRPV4 N 末端的 NMR 骨架分配,并注意到仅根据蛋白质序列预测的无序程度与从实验确定的化学位移之间存在一些差异。因此,为了分析所有 I 组 TRPV 通道远端 N 末端的无序程度,我们现在报告了人 TRPV1、TRPV2 和 TRPV3 IDR 的 NMR 分配。