7KY6

Structure of the S. cerevisiae phosphatidylcholine flippase Dnf1-Lem3 complex in the apo E1 state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 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 DNF11,571Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: DNF1YER166WSYGP-ORF7
EC: 7.6.2.1
Membrane Entity: Yes 
UniProt
Find proteins for P32660 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P32660 
Go to UniProtKB:  P32660
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP32660
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: LEM3GI526_G0004759PACBIOSEQ_LOCUS5272PACBIOSEQ_LOCUS5307SCNYR20_0008001200SCP684_0008000800
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Glycosylation
Glycosylation Sites: 5
Sequence Annotations
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
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
C
3N-Glycosylation
Glycosylation Resources
GlyTouCan:  G62182OO
GlyCosmos:  G62182OO
GlyGen:  G62182OO
Entity ID: 4
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
D, E
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 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: 2024-10-16
    Changes: Data collection, Database references, Structure summary