ABCB19 / Plant hormone transport / BUM-bound / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
acropetal auxin transport / leaf phyllotactic patterning / formation of plant organ boundary / basipetal auxin transport / auxin transport / regulation of secondary shoot formation / anthocyanin accumulation in tissues in response to UV light / positive regulation of brassinosteroid mediated signaling pathway / response to strigolactone / response to red or far red light ...acropetal auxin transport / leaf phyllotactic patterning / formation of plant organ boundary / basipetal auxin transport / auxin transport / regulation of secondary shoot formation / anthocyanin accumulation in tissues in response to UV light / positive regulation of brassinosteroid mediated signaling pathway / response to strigolactone / response to red or far red light / flower structural organization / plant epidermal cell differentiation / flower morphogenesis / regulation of auxin mediated signaling pathway / regulation of leaf morphogenesis / gametophyte development / regulation of unidimensional cell growth / lateral root development / stamen development / response to brassinosteroid / auxin export across the plasma membrane / auxin efflux transmembrane transporter activity / positive gravitropism / response to far red light / auxin polar transport / root development / brassinosteroid mediated signaling pathway / photomorphogenesis / pollen development / response to auxin / response to blue light / auxin-activated signaling pathway / regulation of cell size / ATPase-coupled transmembrane transporter activity / ABC-type transporter activity / transmembrane transport / ATP hydrolysis activity / ATP binding / membrane / 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
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.