phospholipase c / antigen-binding fragment / complex / MEMBRANE PROTEIN
機能・相同性
機能・相同性情報
diacylglycerol biosynthetic process / Synthesis of IP3 and IP4 in the cytosol / phosphoinositide phospholipase C / phosphatidylinositol metabolic process / phospholipase C activity / phosphatidylinositol-4,5-bisphosphate phospholipase C activity / glomerulus development / phosphatidylinositol-mediated signaling / lipid catabolic process / positive regulation of lamellipodium assembly ...diacylglycerol biosynthetic process / Synthesis of IP3 and IP4 in the cytosol / phosphoinositide phospholipase C / phosphatidylinositol metabolic process / phospholipase C activity / phosphatidylinositol-4,5-bisphosphate phospholipase C activity / glomerulus development / phosphatidylinositol-mediated signaling / lipid catabolic process / positive regulation of lamellipodium assembly / release of sequestered calcium ion into cytosol / guanyl-nucleotide exchange factor activity / small GTPase binding / epidermal growth factor receptor signaling pathway / lamellipodium / phospholipase C-activating G protein-coupled receptor signaling pathway / Ras protein signal transduction / intracellular signal transduction / G protein-coupled receptor signaling pathway / Golgi membrane / enzyme binding / metal ion binding / plasma membrane / cytosol 類似検索 - 分子機能
1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase epsilon-1 / : / : / Phosphoinositide phospholipase C family / Phospholipase C, phosphatidylinositol-specific, Y domain / Phosphatidylinositol-specific phospholipase C, Y domain / Phosphatidylinositol-specific phospholipase Y-box domain profile. / Phospholipase C, catalytic domain (part); domain Y / Ras association (RalGDS/AF-6) domain / Ras association (RalGDS/AF-6) domain ...1-phosphatidylinositol 4,5-bisphosphate phosphodiesterase epsilon-1 / : / : / Phosphoinositide phospholipase C family / Phospholipase C, phosphatidylinositol-specific, Y domain / Phosphatidylinositol-specific phospholipase C, Y domain / Phosphatidylinositol-specific phospholipase Y-box domain profile. / Phospholipase C, catalytic domain (part); domain Y / Ras association (RalGDS/AF-6) domain / Ras association (RalGDS/AF-6) domain / Phosphatidylinositol-specific phospholipase C, X domain / Phosphatidylinositol-specific phospholipase C, X domain / Phospholipase C, catalytic domain (part); domain X / Phosphatidylinositol-specific phospholipase X-box domain profile. / Ras-associating (RA) domain profile. / Ras-associating (RA) domain / Ras guanine nucleotide exchange factor domain superfamily / Ras guanine-nucleotide exchange factor, catalytic domain superfamily / RasGEF domain / Ras guanine-nucleotide exchange factors catalytic domain profile. / Guanine nucleotide exchange factor for Ras-like small GTPases / Ras guanine-nucleotide exchange factors catalytic domain / PLC-like phosphodiesterase, TIM beta/alpha-barrel domain superfamily / Protein kinase C conserved region 2 (CalB) / C2 domain / C2 domain / C2 domain profile. / C2 domain superfamily / EF-hand domain pair / Ubiquitin-like domain superfamily 類似検索 - ドメイン・相同性
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)
1R01HL141076-01
米国
American Heart Association
23PRE1011279
米国
引用
ジャーナル: Commun Biol / 年: 2025 タイトル: Cryo-EM structure of phospholipase Cε defines N-terminal domains and their roles in activity. 著者: Kadidia Samassekou / Elisabeth E Garland-Kuntz / Vaani Ohri / Isaac J Fisher / Satchal K Erramilli / Kaushik Muralidharan / Livia M Bogdan / Abigail M Gick / Anthony Kossiakoff / Angeline M Lyon / 要旨: Phospholipase Cε (PLCε) increases intracellular Ca and protein kinase C (PKC) activity in the cardiovascular system in response to stimulation of G protein coupled receptors (GPCRs) and receptor ...Phospholipase Cε (PLCε) increases intracellular Ca and protein kinase C (PKC) activity in the cardiovascular system in response to stimulation of G protein coupled receptors (GPCRs) and receptor tyrosine kinases (RTKs). The ability of PLCε to respond to these diverse inputs is due, in part, to multiple, conformationally dynamic regulatory domains. However, this heterogeneity has limited structural studies of the lipase to either individual domains or its catalytic core. Here, we report the 3.9 Å reconstruction of the largest fragment of PLCε to date in complex with an antigen binding fragment (Fab). The structure reveals that PLCε contains a pleckstrin homology (PH) domain and four tandem EF hands, including subfamily-specific insertions and intramolecular interactions with the catalytic core. The structure, together with a model of the holoenzyme, suggest that part of the N-terminus and PH domain may form a surface that supports lipase activity. Functional characterization of this surface confirms it is critical for maximum basal and G protein-stimulated activities. This study provides new insights into the autoinhibited, basal conformation of PLCε and how the N-terminal domains contribute to activity.
名称: Fab2-rPLCe PH-C / タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: all 詳細: fragment phospholipase Cepsilon (residues 837-2281) in complex with an antigen binding fragment (Fab2)