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基本情報
登録情報 | データベース: PDB / ID: 9krk | ||||||
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タイトル | Cryo-EM structure of human ABCC4 (Apo state) | ||||||
![]() | ATP-binding cassette sub-family C member 4 | ||||||
![]() | TRANSPORT PROTEIN / ABC-type transporter activity / ATP hydrolysis activity / ATPase-coupled transmembrane transporter activity / ATP binding / Transport protein. | ||||||
機能・相同性 | ![]() 15-hydroxyprostaglandin dehydrogenase (NAD+) activity / purine nucleotide transmembrane transporter activity / cAMP transport / guanine nucleotide transmembrane transporter activity / ABC-type bile acid transporter activity / platelet dense granule membrane / platelet degranulation / leukotriene transport / prostaglandin transport / urate transport ...15-hydroxyprostaglandin dehydrogenase (NAD+) activity / purine nucleotide transmembrane transporter activity / cAMP transport / guanine nucleotide transmembrane transporter activity / ABC-type bile acid transporter activity / platelet dense granule membrane / platelet degranulation / leukotriene transport / prostaglandin transport / urate transport / prostaglandin transmembrane transporter activity / ABC-type glutathione S-conjugate transporter activity / glutathione transmembrane transporter activity / ABC-type glutathione-S-conjugate transporter / urate transmembrane transporter activity / : / external side of apical plasma membrane / xenobiotic transmembrane transport / prostaglandin secretion / export across plasma membrane / Paracetamol ADME / ABC-type xenobiotic transporter / トランスロカーゼ; 他の化合物の輸送を触媒; ヌクレオシド三リン酸の加水分解に伴う / Azathioprine ADME / ABC-type xenobiotic transporter activity / bile acid and bile salt transport / efflux transmembrane transporter activity / xenobiotic transmembrane transporter activity / cilium assembly / ATPase-coupled transmembrane transporter activity / ABC-type transporter activity / transport across blood-brain barrier / xenobiotic metabolic process / ABC-family proteins mediated transport / transmembrane transport / Platelet degranulation / basolateral plasma membrane / apical plasma membrane / intracellular membrane-bounded organelle / nucleolus / Golgi apparatus / ATP hydrolysis activity / ATP binding / membrane / plasma membrane 類似検索 - 分子機能 | ||||||
生物種 | ![]() | ||||||
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: 3.29 Å | ||||||
![]() | Li, M.H. / Wen, X.P. | ||||||
資金援助 | 1件
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![]() | ![]() タイトル: Structural basis of human ABCC4 recognition of cAMP and ligand recognition flexibility. 著者: Xuepeng Wen / Kaixue Si / Dantong Zhu / Anqi Zhang / Changyou Guo / Minghui Li / Weiming Tian / ![]() 要旨: BACKGROUND: ABCC4 (ATP-binding cassette sub-family C member 4) is a transporter protein that is primarily localized to the plasma membrane, and its efflux activity is associated with the progression ...BACKGROUND: ABCC4 (ATP-binding cassette sub-family C member 4) is a transporter protein that is primarily localized to the plasma membrane, and its efflux activity is associated with the progression of various cancers and the development of drug resistance. Cyclic adenosine monophosphate (cAMP) is an important biomolecule that is considered a transport substrate of ABCC4. However, there is currently no direct structural understanding of how ABCC4 binds cAMP, and the mechanisms by which it recognizes a diverse range of substrate ligands remain poorly understood. Some studies have indicated that, under physiological conditions, cAMP does not significantly stimulate the ATPase activity of ABCC4, making the commonly used ATPase activity assays for ABC proteins unsuitable for studying cAMP. RESULTS: Here, we successfully resolved the cryo-electron microscopy (cryo-EM) structure of the human ABCC4-cAMP (hABCC4-cAMP) complex, revealing how hABCC4 binds to cAMP and identifying the key ...RESULTS: Here, we successfully resolved the cryo-electron microscopy (cryo-EM) structure of the human ABCC4-cAMP (hABCC4-cAMP) complex, revealing how hABCC4 binds to cAMP and identifying the key residues involved. This structure was compared with two other hABCC4 complex structures we obtained (Methotrexate and Prostaglandin E) and with previously published structures. We discovered some new structural insights into how hABCC4 binds ligands. On the basis of the structural information obtained, we confirmed the feasibility of using 8-[Fluo]-cAMP in a transport assay to detect cAMP translocation and found that some challenges remain to be addressed. CONCLUSIONS: These results suggest that hABCC4 can bind cAMP and exhibits varying degrees of flexibility when binding with different substrates, including cAMP. These findings expand our ...CONCLUSIONS: These results suggest that hABCC4 can bind cAMP and exhibits varying degrees of flexibility when binding with different substrates, including cAMP. These findings expand our understanding of the structural biology of ABCC4. | ||||||
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構造の表示
構造ビューア | 分子: ![]() ![]() |
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ダウンロードとリンク
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PDBx/mmCIF形式 | ![]() | 184.2 KB | 表示 | ![]() |
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PDB形式 | ![]() | 140.3 KB | 表示 | ![]() |
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-検証レポート
文書・要旨 | ![]() | 1.2 MB | 表示 | ![]() |
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文書・詳細版 | ![]() | 1.2 MB | 表示 | |
XML形式データ | ![]() | 38.5 KB | 表示 | |
CIF形式データ | ![]() | 58.2 KB | 表示 | |
アーカイブディレクトリ | ![]() ![]() | HTTPS FTP |
-関連構造データ
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リンク
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集合体
登録構造単位 | ![]()
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要素
#1: タンパク質 | 分子量: 149693.922 Da / 分子数: 1 / 由来タイプ: 組換発現 / 由来: (組換発現) ![]() 発現宿主: ![]() ![]() 参照: UniProt: O15439, トランスロカーゼ; 他の化合物の輸送を触媒; ヌクレオシド三リン酸の加水分解に伴う, ABC-type xenobiotic transporter, ABC-type glutathione-S-conjugate transporter |
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Has protein modification | N |
-実験情報
-実験
実験 | 手法: 電子顕微鏡法 |
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EM実験 | 試料の集合状態: PARTICLE / 3次元再構成法: 単粒子再構成法 |
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試料調製
構成要素 | 名称: human ABCC4 (Apo state) / タイプ: ORGANELLE OR CELLULAR COMPONENT / Entity ID: all / 由来: RECOMBINANT |
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由来(天然) | 生物種: ![]() |
由来(組換発現) | 生物種: ![]() ![]() |
緩衝液 | pH: 7.4 |
試料 | 包埋: NO / シャドウイング: NO / 染色: NO / 凍結: YES |
急速凍結 | 凍結剤: ETHANE |
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電子顕微鏡撮影
実験機器 | ![]() モデル: Titan Krios / 画像提供: FEI Company |
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顕微鏡 | モデル: TFS KRIOS |
電子銃 | 電子線源: ![]() |
電子レンズ | モード: BRIGHT FIELD / 最大 デフォーカス(公称値): 2200 nm / 最小 デフォーカス(公称値): 1200 nm |
撮影 | 電子線照射量: 60 e/Å2 フィルム・検出器のモデル: GATAN K2 SUMMIT (4k x 4k) |
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解析
EMソフトウェア | 名称: PHENIX / バージョン: 1.16_3549 / カテゴリ: モデル精密化 | ||||||||||||||||||||||||
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CTF補正 | タイプ: NONE | ||||||||||||||||||||||||
3次元再構成 | 解像度: 3.29 Å / 解像度の算出法: FSC 0.143 CUT-OFF / 粒子像の数: 111741 / 対称性のタイプ: POINT | ||||||||||||||||||||||||
精密化 | 立体化学のターゲット値: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS) | ||||||||||||||||||||||||
拘束条件 |
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