- PDB-7kr5: Cryo-EM structure of the CRAC channel Orai in an open conformatio... -
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基本情報
登録情報
データベース: PDB / ID: 7kr5
タイトル
Cryo-EM structure of the CRAC channel Orai in an open conformation; H206A gain-of-function mutation in complex with an antibody
要素
19B5 Fab heavy chain
19B5 Fab light chain
Calcium release-activated calcium channel protein 1
キーワード
TRANSPORT PROTEIN/IMMUNE SYSTEM / ion channel / calcium / SOCE / CRAC / eukaryotic / open structure / MEMBRANE PROTEIN / amphiboles / cryo-EM / TRANSPORT PROTEIN-IMMUNE SYSTEM complex
機能・相同性
機能・相同性情報
store-operated calcium entry / store-operated calcium channel activity / positive regulation of calcineurin-NFAT signaling cascade / positive regulation of calcium ion transport / calcium channel regulator activity / calcium channel complex / calcium ion transmembrane transport / calcium channel activity / identical protein binding / membrane / plasma membrane 類似検索 - 分子機能
Calcium release-activated calcium channel protein / Orai superfamily / Mediator of CRAC channel activity 類似検索 - ドメイン・相同性
Calcium release-activated calcium channel protein 1 類似検索 - 構成要素
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R35GM131921
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM094273
米国
引用
ジャーナル: Elife / 年: 2020 タイトル: Cryo-EM structure of the calcium release-activated calcium channel Orai in an open conformation. 著者: Xiaowei Hou / Ian R Outhwaite / Leanne Pedi / Stephen Barstow Long / 要旨: The calcium release-activated calcium channel Orai regulates Ca entry into non-excitable cells and is required for proper immune function. While the channel typically opens following Ca release from ...The calcium release-activated calcium channel Orai regulates Ca entry into non-excitable cells and is required for proper immune function. While the channel typically opens following Ca release from the endoplasmic reticulum, certain pathologic mutations render the channel constitutively open. Previously, using one such mutation (H206A), we obtained low (6.7 Å) resolution X-ray structural information on Orai in an open conformation (Hou et al., 2018). Here we present a structure of this open conformation at 3.3 Å resolution using fiducial-assisted cryo-electron microscopy. The improved structure reveals the conformations of amino acids in the open pore, which dilates by outward movements of subunits. A ring of phenylalanine residues repositions to expose previously shielded glycine residues to the pore without significant rotational movement of the associated helices. Together with other hydrophobic amino acids, the phenylalanines act as the channel's gate. Structured M1-M2 turrets, not evident previously, form the channel's extracellular entrance.
履歴
登録
2020年11月18日
登録サイト: RCSB / 処理サイト: RCSB
改定 1.0
2020年12月9日
Provider: repository / タイプ: Initial release
改定 1.0
2020年12月9日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
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2020年12月9日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
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2020年12月9日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
改定 1.0
2020年12月9日
Data content type: Image / Data content type: Image / Provider: repository / タイプ: Initial release
改定 1.0
2020年12月9日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release
Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / カテゴリ: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name
#256 - 2021年4月 SARSコロナウイルス2型のスパイクと抗体 (SARS-CoV-2 Spike and Antibodies) 類似性 (1)
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集合体
登録構造単位
A: Calcium release-activated calcium channel protein 1 B: Calcium release-activated calcium channel protein 1 C: Calcium release-activated calcium channel protein 1 D: Calcium release-activated calcium channel protein 1 E: Calcium release-activated calcium channel protein 1 F: Calcium release-activated calcium channel protein 1 H: 19B5 Fab heavy chain L: 19B5 Fab light chain M: 19B5 Fab heavy chain N: 19B5 Fab light chain O: 19B5 Fab heavy chain P: 19B5 Fab light chain ヘテロ分子