7KYA

Structure of the S. cerevisiae phosphatidylcholine flippase Dnf2-Lem3 complex in the E2P state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Transport mechanism of P4 ATPase phosphatidylcholine flippases.

Bai, L.You, Q.Jain, B.K.Duan, H.D.Kovach, A.Graham, T.R.Li, H.

(2020) Elife 9

  • DOI: https://doi.org/10.7554/eLife.62163
  • Primary Citation of Related Structures:  
    7KY5, 7KY6, 7KY7, 7KY8, 7KY9, 7KYA, 7KYB, 7KYC

  • PubMed Abstract: 

    The P4 ATPases use ATP hydrolysis to transport large lipid substrates across lipid bilayers. The structures of the endosome- and Golgi-localized phosphatidylserine flippases-such as the yeast Drs2 and human ATP8A1-have recently been reported. However, a substrate-binding site on the cytosolic side has not been found, and the transport mechanisms of P4 ATPases with other substrates are unknown. Here, we report structures of the S. cerevisiae Dnf1-Lem3 and Dnf2-Lem3 complexes. We captured substrate phosphatidylcholine molecules on both the exoplasmic and cytosolic sides and found that they have similar structures. Unexpectedly, Lem3 contributes to substrate binding. The conformational transitions of these phosphatidylcholine transporters match those of the phosphatidylserine transporters, suggesting a conserved mechanism among P4 ATPases. Dnf1/Dnf2 have a unique P domain helix-turn-helix insertion that is important for function. Therefore, P4 ATPases may have retained an overall transport mechanism while evolving distinct features for different lipid substrates.


  • Organizational Affiliation

    Department of Biochemistry and Biophysics, School of Basic Medical Sciences, Peking University, Beijing, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Phospholipid-transporting ATPase DNF21,612Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: DNF2YDR093WYD8557.01
EC: 7.6.2.1
Membrane Entity: Yes 
UniProt
Find proteins for Q12675 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12675 
Go to UniProtKB:  Q12675
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ12675
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Alkylphosphocholine resistance protein LEM3414Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: LEM3BRE3ROS3YNL323WN0333
Membrane Entity: Yes 
UniProt
Find proteins for P42838 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P42838 
Go to UniProtKB:  P42838
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP42838
Glycosylation
Glycosylation Sites: 5Go to GlyGen: P42838-1
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
C, E, F
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D
3N-Glycosylation
Glycosylation Resources
GlyTouCan:  G62182OO
GlyCosmos:  G62182OO
GlyGen:  G62182OO
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CLR
Query on CLR

Download Ideal Coordinates CCD File 
G [auth A],
J [auth A],
K [auth A],
L [auth A],
M [auth B]
CHOLESTEROL
C27 H46 O
HVYWMOMLDIMFJA-DPAQBDIFSA-N
NAG
Query on NAG

Download Ideal Coordinates CCD File 
N [auth B]2-acetamido-2-deoxy-beta-D-glucopyranose
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
BEF
Query on BEF

Download Ideal Coordinates CCD File 
I [auth A]BERYLLIUM TRIFLUORIDE ION
Be F3
OGIAHMCCNXDTIE-UHFFFAOYSA-K
MG
Query on MG

Download Ideal Coordinates CCD File 
H [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.50 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United StatesCA231466 to H.L. and GM107978 to T.R.G.

Revision History  (Full details and data files)

  • Version 1.0: 2021-01-06
    Type: Initial release
  • Version 1.1: 2024-10-23
    Changes: Data collection, Database references, Structure summary