- EMDB-61446: Cryo-EM structure of neuropeptide FF receptor 2 in the ligand-fre... -
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データベース: EMDB / ID: EMD-61446
タイトル
Cryo-EM structure of neuropeptide FF receptor 2 in the ligand-free state with BRIL fusion, anti-BRIL Fab, and nanobody
マップデータ
試料
複合体: human neuropeptide FF receptor 2 in the apo state with BRIL fusion, anti-BRIL Fab, and nanobody
タンパク質・ペプチド: Isoform 2 of Neuropeptide FF receptor 2,Soluble cytochrome b562
タンパク質・ペプチド: Anti-BRIL fab heavy chain
タンパク質・ペプチド: Anti-fab nanobody
タンパク質・ペプチド: Anti-BRIL fab light chain
キーワード
GPCR / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
opioid receptor binding / Orexin and neuropeptides FF and QRFP bind to their respective receptors / detection of abiotic stimulus / neuropeptide receptor activity / regulation of MAPK cascade / neuropeptide signaling pathway / cellular response to hormone stimulus / electron transport chain / G protein-coupled receptor activity / actin cytoskeleton ...opioid receptor binding / Orexin and neuropeptides FF and QRFP bind to their respective receptors / detection of abiotic stimulus / neuropeptide receptor activity / regulation of MAPK cascade / neuropeptide signaling pathway / cellular response to hormone stimulus / electron transport chain / G protein-coupled receptor activity / actin cytoskeleton / G alpha (q) signalling events / periplasmic space / electron transfer activity / G protein-coupled receptor signaling pathway / iron ion binding / heme binding / plasma membrane 類似検索 - 分子機能
Neuropeptide FF receptor family / Neuropeptide FF receptor, type 2 / Cytochrome b562 / Cytochrome b562 / Cytochrome c/b562 / Serpentine type 7TM GPCR chemoreceptor Srsx / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family) 類似検索 - ドメイン・相同性
ジャーナル: EMBO Rep / 年: 2025 タイトル: Structural insights into the selective recognition of RF-amide peptides by neuropeptide FF receptor 2. 著者: Jeesoo Kim / Sooyoung Hong / Hajin Lee / Hyun Sik Lee / Chaehee Park / Jinuk Kim / Wonpil Im / Hee-Jung Choi / 要旨: Neuropeptide FF Receptor 2 (NPFFR2), a G-protein-coupled receptor, plays a role in pain modulation and diet-induced thermogenesis. While NPFFR2 is strongly activated by neuropeptides FF (NPFFs), it ...Neuropeptide FF Receptor 2 (NPFFR2), a G-protein-coupled receptor, plays a role in pain modulation and diet-induced thermogenesis. While NPFFR2 is strongly activated by neuropeptides FF (NPFFs), it shows low activity in response to RF-amide-related peptides (RFRPs), despite the peptides belonging to a shared family. In contrast, NPFFR1, which shares high sequence similarity with NPFFR2, is activated by RFRPs and regulates reproductive hormone balance. The molecular basis for these receptor-specific interactions with their RF-amide peptides remains unclear. Here, we present cryo-electron microscopy structures of NPFFR2 in its active state bound to the agonist RF-amide peptide hNPSF, and in its ligand-free state. Structural analysis reveals that the C-terminal RF-amide moiety engages conserved residues in the transmembrane domain, while the N-terminal segment interacts in a receptor subtype-specific manner. Key selectivity-determining residues in NPFFR2 are also identified. A homology model of NPFFR1 bound to RFRP, supported by mutagenesis studies, further validates this selectivity mechanism. Additionally, structural comparison between the inactive and active states of NPFFR2 suggests a TM3-mediated activation mechanism. These findings provide insights into RF-amide peptide recognition by NPFF receptors.