- PDB-9kjc: Cryo-EM structure of BL-bound atABCB19 in lipid nanodisc -
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基本情報
登録情報
データベース: PDB / ID: 9kjc
タイトル
Cryo-EM structure of BL-bound atABCB19 in lipid nanodisc
要素
ABC transporter B family member 19
キーワード
MEMBRANE PROTEIN / ABCB19 / Plant hormone transport / BL-bound
機能・相同性
機能・相同性情報
acropetal auxin transport / formation of plant organ boundary / basipetal auxin transport / auxin transport / anthocyanin accumulation in tissues in response to UV light / positive regulation of brassinosteroid mediated signaling pathway / response to red or far red light / lateral root development / stamen development / response to brassinosteroid ...acropetal auxin transport / formation of plant organ boundary / basipetal auxin transport / auxin transport / anthocyanin accumulation in tissues in response to UV light / positive regulation of brassinosteroid mediated signaling pathway / response to red or far red light / lateral root development / stamen development / response to brassinosteroid / positive gravitropism / auxin export across the plasma membrane / auxin efflux transmembrane transporter activity / auxin polar transport / response to far red light / root development / photomorphogenesis / response to auxin / response to blue light / auxin-activated signaling pathway / regulation of cell size / ABC-type transporter activity / ATP hydrolysis activity / ATP binding / plasma membrane / cytosol 類似検索 - 分子機能
Type 1 protein exporter / 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. ...Type 1 protein exporter / 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. / 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
Brassinolide / ABC transporter B family member 19 類似検索 - 構成要素
ジャーナル: Sci Adv / 年: 2025 タイトル: Conformational cycle and small-molecule inhibition mechanism of a plant ABCB transporter in lipid membranes. 著者: Yong Liu / Maofu Liao / 要旨: In plants, ATP-binding cassette (ABC) transporters are crucial for nutrient uptake, phytohormone transport, and environmental response. It is of great interest to understand the mechanisms of these ...In plants, ATP-binding cassette (ABC) transporters are crucial for nutrient uptake, phytohormone transport, and environmental response. It is of great interest to understand the mechanisms of these transporters and develop small-molecule modulators to regulate plant growth. ABCB19 was recently shown to transport brassinosteroid, shaping hormone dynamics and plant architecture. However, the conformational cycle and inhibitor mechanism of ABCB transporters remain elusive. We reconstituted ABCB19 into lipid nanodiscs, where activity was drastically higher than in detergents, and determined its cryo-electron microscopy structures in substrate-free, substrate-bound, vanadate-trapped, and inhibitor-bound states. Inward-facing ABCB19 moved inward upon substrate binding and fully closed with vanadate trapping, unexpectedly temperature dependent. Two inhibitor molecules locked ABCB19 in the inward-facing conformation. Mutagenesis identified key residues for substrate and inhibitor binding, revealing differential contributions to transporter function and inhibition. These results deepen knowledge of plant ABCB transporters, laying a foundation for targeted manipulation to enhance plant resilience and productivity.
履歴
登録
2024年11月12日
登録サイト: PDBJ / 処理サイト: PDBC
改定 1.0
2025年5月21日
Provider: repository / タイプ: Initial release
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2025年5月21日
Data content type: EM metadata / Data content type: EM metadata / Provider: repository / タイプ: Initial release
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2025年5月21日
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2025年5月21日
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2025年5月21日
Data content type: Primary map / Data content type: Primary map / Provider: repository / タイプ: Initial release