登録情報 データベース : PDB / ID : 5twv 構造の表示 ダウンロードとリンクタイトル Cryo-EM structure of the pancreatic ATP-sensitive K+ channel SUR1/Kir6.2 in the presence of ATP and glibenclamide 要素ATP-binding cassette sub-family C member 8 ATP-sensitive inward rectifier potassium channel 11 詳細キーワード TRANSPORT PROTEIN / katp / kir6.2 / sur1 / potassium channel機能・相同性 機能・相同性情報分子機能 ドメイン・相同性 構成要素
Regulation of insulin secretion / ATP sensitive Potassium channels / ABC-family proteins mediated transport / response to resveratrol / ATP-activated inward rectifier potassium channel activity / inward rectifying potassium channel / sulfonylurea receptor activity / ventricular cardiac muscle tissue development / cell body fiber / CAMKK-AMPK signaling cascade ... Regulation of insulin secretion / ATP sensitive Potassium channels / ABC-family proteins mediated transport / response to resveratrol / ATP-activated inward rectifier potassium channel activity / inward rectifying potassium channel / sulfonylurea receptor activity / ventricular cardiac muscle tissue development / cell body fiber / CAMKK-AMPK signaling cascade / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / inward rectifier potassium channel activity / ATPase-coupled monoatomic cation transmembrane transporter activity / regulation of monoatomic ion transmembrane transport / nervous system process / inorganic cation transmembrane transport / ankyrin binding / Ion homeostasis / response to ATP / response to stress / potassium ion import across plasma membrane / response to testosterone / action potential / voltage-gated potassium channel activity / axolemma / intercalated disc / potassium channel activity / ABC-type transporter activity / cellular response to nutrient levels / negative regulation of insulin secretion / heat shock protein binding / potassium ion transmembrane transport / T-tubule / regulation of insulin secretion / acrosomal vesicle / response to ischemia / regulation of membrane potential / determination of adult lifespan / positive regulation of protein localization to plasma membrane / cellular response to glucose stimulus / potassium ion transport / sarcolemma / cellular response to nicotine / glucose metabolic process / nuclear envelope / cellular response to tumor necrosis factor / response to estradiol / presynaptic membrane / transmembrane transporter binding / response to hypoxia / endosome / response to xenobiotic stimulus / neuronal cell body / apoptotic process / glutamatergic synapse / protein-containing complex / ATP hydrolysis activity / ATP binding / metal ion binding / plasma membrane / cytoplasm 類似検索 - 分子機能 Potassium channel, inwardly rectifying, Kir6.2 / ATP-binding cassette subfamily C member 8 / Sulphonylurea receptor / Potassium channel, inwardly rectifying, transmembrane domain / Inward rectifier potassium channel transmembrane domain / Potassium channel, inwardly rectifying, Kir, cytoplasmic / Potassium channel, inwardly rectifying, Kir / Inward rectifier potassium channel, C-terminal / Inward rectifier potassium channel C-terminal domain / : ... Potassium channel, inwardly rectifying, Kir6.2 / ATP-binding cassette subfamily C member 8 / Sulphonylurea receptor / Potassium channel, inwardly rectifying, transmembrane domain / Inward rectifier potassium channel transmembrane domain / Potassium channel, inwardly rectifying, Kir, cytoplasmic / Potassium channel, inwardly rectifying, Kir / Inward rectifier potassium channel, C-terminal / Inward rectifier potassium channel C-terminal domain / : / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / Immunoglobulin E-set / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase 類似検索 - ドメイン・相同性 ADENOSINE-5'-TRIPHOSPHATE / ATP-sensitive inward rectifier potassium channel 11 / ATP-binding cassette sub-family C member 8 類似検索 - 構成要素生物種 Rattus norvegicus (ドブネズミ)Cricetus cricetus (クロハラハムスクー)手法 電子顕微鏡法 / 単粒子再構成法 / クライオ電子顕微鏡法 / 解像度 : 6.3 Å 詳細データ登録者 Martin, G.M. / Yoshioka, C. / Chen, J.Z. / Shyng, S.L. 資金援助 米国, 2件 詳細 詳細を隠す組織 認可番号 国 National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK) R01DK066485 米国 National Institutes of Health/National Institute of Diabetes and Digestive and Kidney Disease (NIH/NIDDK) F31DK105300 米国
引用ジャーナル : Elife / 年 : 2017タイトル : Cryo-EM structure of the ATP-sensitive potassium channel illuminates mechanisms of assembly and gating.著者 : Gregory M Martin / Craig Yoshioka / Emily A Rex / Jonathan F Fay / Qing Xie / Matthew R Whorton / James Z Chen / Show-Ling Shyng / 要旨 : K channels are metabolic sensors that couple cell energetics to membrane excitability. In pancreatic β-cells, channels formed by SUR1 and Kir6.2 regulate insulin secretion and are the targets of ... K channels are metabolic sensors that couple cell energetics to membrane excitability. In pancreatic β-cells, channels formed by SUR1 and Kir6.2 regulate insulin secretion and are the targets of antidiabetic sulfonylureas. Here, we used cryo-EM to elucidate structural basis of channel assembly and gating. The structure, determined in the presence of ATP and the sulfonylurea glibenclamide, at ~6 Å resolution reveals a closed Kir6.2 tetrameric core with four peripheral SUR1s each anchored to a Kir6.2 by its N-terminal transmembrane domain (TMD0). Intricate interactions between TMD0, the loop following TMD0, and Kir6.2 near the proposed PIP binding site, and where ATP density is observed, suggest SUR1 may contribute to ATP and PIP binding to enhance Kir6.2 sensitivity to both. The SUR1-ABC core is found in an unusual inward-facing conformation whereby the two nucleotide binding domains are misaligned along a two-fold symmetry axis, revealing a possible mechanism by which glibenclamide inhibits channel activity. 履歴 登録 2016年11月14日 登録サイト : RCSB / 処理サイト : RCSB改定 1.0 2017年1月25日 Provider : repository / タイプ : Initial release改定 1.1 2017年5月31日 Group : Structure summary改定 1.2 2017年9月13日 Group : Author supporting evidence / Data collectionカテゴリ : em_image_scans / em_software / pdbx_audit_supportItem : _em_software.name / _pdbx_audit_support.funding_organization改定 1.3 2019年12月25日 Group : Author supporting evidence / カテゴリ : pdbx_audit_support / Item : _pdbx_audit_support.funding_organization改定 1.4 2024年10月23日 Group : Data collection / Database references / Structure summaryカテゴリ : chem_comp_atom / chem_comp_bond ... chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature Item : _database_2.pdbx_DOI / _database_2.pdbx_database_accession ... _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _em_admin.last_update / _pdbx_entry_details.has_protein_modification
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