- EMDB-7082: cryo-EM structure of TRPM4 in apo state with long coiled coil at ... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-7082
タイトル
cryo-EM structure of TRPM4 in apo state with long coiled coil at 3.5 angstrom resolution
マップデータ
Structure of TRPM4 in apo state with long coiled coil at 3.5 angstrom
試料
複合体: homotetramer of mouse TRPM4
タンパク質・ペプチド: Transient receptor potential cation channel subfamily M member 4
リガンド: SODIUM ION
キーワード
ion channel / TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
positive regulation of atrial cardiac muscle cell action potential / positive regulation of regulation of vascular associated smooth muscle cell membrane depolarization / sodium channel complex / regulation of T cell cytokine production / membrane depolarization during AV node cell action potential / membrane depolarization during bundle of His cell action potential / membrane depolarization during Purkinje myocyte cell action potential / negative regulation of bone mineralization / metal ion transport / TRP channels ...positive regulation of atrial cardiac muscle cell action potential / positive regulation of regulation of vascular associated smooth muscle cell membrane depolarization / sodium channel complex / regulation of T cell cytokine production / membrane depolarization during AV node cell action potential / membrane depolarization during bundle of His cell action potential / membrane depolarization during Purkinje myocyte cell action potential / negative regulation of bone mineralization / metal ion transport / TRP channels / voltage-gated monoatomic ion channel activity / regulation of ventricular cardiac muscle cell action potential / calcium-activated cation channel activity / sodium ion import across plasma membrane / : / dendritic cell chemotaxis / cellular response to ATP / regulation of heart rate by cardiac conduction / monoatomic cation transmembrane transport / protein sumoylation / positive regulation of vasoconstriction / negative regulation of osteoblast differentiation / positive regulation of fat cell differentiation / long-term memory / positive regulation of heart rate / positive regulation of adipose tissue development / positive regulation of insulin secretion involved in cellular response to glucose stimulus / calcium-mediated signaling / regulation of membrane potential / calcium channel activity / calcium ion transport / positive regulation of canonical Wnt signaling pathway / positive regulation of cytosolic calcium ion concentration / protein homotetramerization / adaptive immune response / calmodulin binding / neuronal cell body / calcium ion binding / positive regulation of cell population proliferation / endoplasmic reticulum / Golgi apparatus / nucleoplasm / ATP binding / membrane / identical protein binding / plasma membrane 類似検索 - 分子機能
TRPM, SLOG domain / : / : / SLOG in TRPM / TRPM2-like domain / Ion transport domain / Ion transport protein 類似検索 - ドメイン・相同性
Transient receptor potential cation channel subfamily M member 4 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM079179
米国
Welch Foundation
I-1578
米国
Howard Hughes Medical Institute (HHMI)
米国
Cancer Prevention and Research Institute of Texas (CPRIT)
米国
Virginia Murchison Linthicum Scholar in Medical Research fund
米国
引用
ジャーナル: Nature / 年: 2017 タイトル: Structures of the calcium-activated, non-selective cation channel TRPM4. 著者: Jiangtao Guo / Ji She / Weizhong Zeng / Qingfeng Chen / Xiao-Chen Bai / Youxing Jiang / 要旨: TRPM4 is a calcium-activated, phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P) -modulated, non-selective cation channel that belongs to the family of melastatin-related transient receptor ...TRPM4 is a calcium-activated, phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P) -modulated, non-selective cation channel that belongs to the family of melastatin-related transient receptor potential (TRPM) channels. Here we present the electron cryo-microscopy structures of the mouse TRPM4 channel with and without ATP. TRPM4 consists of multiple transmembrane and cytosolic domains, which assemble into a three-tiered architecture. The N-terminal nucleotide-binding domain and the C-terminal coiled-coil participate in the tetrameric assembly of the channel; ATP binds at the nucleotide-binding domain and inhibits channel activity. TRPM4 has an exceptionally wide filter but is only permeable to monovalent cations; filter residue Gln973 is essential in defining monovalent selectivity. The S1-S4 domain and the post-S6 TRP domain form the central gating apparatus that probably houses the Ca- and PtdIns(4,5)P-binding sites. These structures provide an essential starting point for elucidating the complex gating mechanisms of TRPM4 and reveal the molecular architecture of the TRPM family.
タイプ: PROJECTION MATCHING / ソフトウェア - 名称: RELION (ver. 2) 詳細: Auto-refinement in Relion generated the final reconstruction. The angular sampling was determined automatically in Relion.
最終 3次元分類
クラス数: 8 / ソフトウェア - 名称: RELION (ver. 2) 詳細: A focused 3D classification at the coiled coil domain was performed.