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Yorodumi- PDB-6psy: Cryo-EM structure of S. cerevisiae Drs2p-Cdc50p in the autoinhibi... -
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-Basic information
Entry | Database: PDB / ID: 6psy | |||||||||
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Title | Cryo-EM structure of S. cerevisiae Drs2p-Cdc50p in the autoinhibited apo form | |||||||||
Components |
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Keywords | TRANSLOCASE / complex / phospholipid flippase / P-type ATPase | |||||||||
Function / homology | Function and homology information Cdc50p-Drs2p complex / actin cortical patch localization / aminophospholipid translocation / Ion transport by P-type ATPases / phosphatidylcholine flippase activity / post-Golgi vesicle-mediated transport / phosphatidylserine flippase activity / ATPase-coupled intramembrane lipid transporter activity / phospholipid-translocating ATPase complex / phosphatidylserine floppase activity ...Cdc50p-Drs2p complex / actin cortical patch localization / aminophospholipid translocation / Ion transport by P-type ATPases / phosphatidylcholine flippase activity / post-Golgi vesicle-mediated transport / phosphatidylserine flippase activity / ATPase-coupled intramembrane lipid transporter activity / phospholipid-translocating ATPase complex / phosphatidylserine floppase activity / phosphatidylethanolamine flippase activity / P-type phospholipid transporter / endocytic recycling / retrograde transport, endosome to Golgi / phosphatidylinositol-4-phosphate binding / phospholipid translocation / Neutrophil degranulation / intracellular protein transport / trans-Golgi network / endocytosis / late endosome membrane / endosome membrane / Golgi apparatus / magnesium ion binding / endoplasmic reticulum / ATP hydrolysis activity / ATP binding / plasma membrane / cytosol Similarity search - Function | |||||||||
Biological species | Saccharomyces cerevisiae W303 (yeast) | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å | |||||||||
Authors | Bai, L. / Li, H. | |||||||||
Funding support | United States, 1items
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Citation | Journal: Nat Commun / Year: 2019 Title: Autoinhibition and activation mechanisms of the eukaryotic lipid flippase Drs2p-Cdc50p. Authors: Lin Bai / Amanda Kovach / Qinglong You / Hao-Chi Hsu / Gongpu Zhao / Huilin Li / Abstract: The heterodimeric eukaryotic Drs2p-Cdc50p complex is a lipid flippase that maintains cell membrane asymmetry. The enzyme complex exists in an autoinhibited form in the absence of an activator and is ...The heterodimeric eukaryotic Drs2p-Cdc50p complex is a lipid flippase that maintains cell membrane asymmetry. The enzyme complex exists in an autoinhibited form in the absence of an activator and is specifically activated by phosphatidylinositol-4-phosphate (PI4P), although the underlying mechanisms have been unclear. Here we report the cryo-EM structures of intact Drs2p-Cdc50p isolated from S. cerevisiae in apo form and in the PI4P-activated form at 2.8 Å and 3.3 Å resolution, respectively. The structures reveal that the Drs2p C-terminus lines a long groove in the cytosolic regulatory region to inhibit the flippase activity. PIP4 binding in a cytosol-proximal membrane region triggers a 90° rotation of a cytosolic helix switch that is located just upstream of the inhibitory C-terminal peptide. The rotation of the helix switch dislodges the C-terminus from the regulatory region, activating the flippase. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
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PDBx/mmCIF format | 6psy.cif.gz | 272.8 KB | Display | PDBx/mmCIF format |
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PDB format | pdb6psy.ent.gz | 211.8 KB | Display | PDB format |
PDBx/mmJSON format | 6psy.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Summary document | 6psy_validation.pdf.gz | 834.7 KB | Display | wwPDB validaton report |
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Full document | 6psy_full_validation.pdf.gz | 850.7 KB | Display | |
Data in XML | 6psy_validation.xml.gz | 43.3 KB | Display | |
Data in CIF | 6psy_validation.cif.gz | 65.5 KB | Display | |
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/ps/6psy ftp://data.pdbj.org/pub/pdb/validation_reports/ps/6psy | HTTPS FTP |
-Related structure data
Related structure data | 20468MC 6psxC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 153928.719 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Saccharomyces cerevisiae W303 (yeast) / Strain: W303 / Gene: DRS2, YAL026C, FUN38 / Production host: Saccharomyces cerevisiae W303 (yeast) References: UniProt: P39524, P-type phospholipid transporter | ||||
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#2: Protein | Mass: 45037.312 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Saccharomyces cerevisiae W303 (yeast) / Strain: W303 / Gene: CDC50, YCR094W, YCR94W / Production host: Saccharomyces cerevisiae W303 (yeast) / References: UniProt: P25656 | ||||
#3: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source | ||||
#4: Sugar | Has ligand of interest | N | Has protein modification | Y | |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
-Sample preparation
Component | Name: Drs2p-Cdc50p complex / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT |
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Source (natural) | Organism: Saccharomyces cerevisiae W303 (yeast) |
Source (recombinant) | Organism: Saccharomyces cerevisiae W303 (yeast) |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: unspecified |
Vitrification | Cryogen name: ETHANE |
-Electron microscopy imaging
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELD |
Image recording | Electron dose: 2 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.11.1_2575: / Classification: refinement | ||||||||||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: NONE | ||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1040625 | ||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 635300 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT | ||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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