5U1D

Cryo-EM structure of the human TAP ATP-Binding Cassette Transporter


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.97 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

Structure of the transporter associated with antigen processing trapped by herpes simplex virus.

Oldham, M.L.Grigorieff, N.Chen, J.

(2016) Elife 5: --

  • DOI: 10.7554/eLife.21829

  • PubMed Abstract: 
  • The transporter associated with antigen processing (TAP) is an ATP-binding cassette (ABC) transporter essential to cellular immunity against viral infection. Some persistent viruses have evolved strategies to inhibit TAP so that they may go undetecte ...

    The transporter associated with antigen processing (TAP) is an ATP-binding cassette (ABC) transporter essential to cellular immunity against viral infection. Some persistent viruses have evolved strategies to inhibit TAP so that they may go undetected by the immune system. The herpes simplex virus for example evades immune surveillance by blocking peptide transport with a small viral protein ICP47. In this study, we determined the structure of human TAP bound to ICP47 by electron cryo-microscopy (cryo-EM) to 4.0 Å. The structure shows that ICP47 traps TAP in an inactive conformation distinct from the normal transport cycle. The specificity and potency of ICP47 inhibition result from contacts between the tip of the helical hairpin and the apex of the transmembrane cavity. This work provides a clear molecular description of immune evasion by a persistent virus. It also establishes the molecular structure of TAP to facilitate mechanistic studies of the antigen presentation process.


    Organizational Affiliation

    Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, United States.,Howard Hughes Medical Institute, The Rockefeller University, New York, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Antigen peptide transporter 1
A
748Homo sapiensMutation(s): 0 
Gene Names: TAP1 (ABCB2, PSF1, RING4, Y3)
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
Transporter associated with antigen processing (TAP) bound to ICP47
Find proteins for Q03518 (Homo sapiens)
Go to Gene View: TAP1
Go to UniProtKB:  Q03518
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Antigen peptide transporter 2
B
686Homo sapiensMutation(s): 0 
Gene Names: TAP2 (ABCB3, PSF2, RING11, Y1)
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
Transporter associated with antigen processing (TAP) bound to ICP47
Find proteins for Q03519 (Homo sapiens)
Go to Gene View: TAP2
Go to UniProtKB:  Q03519
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
TAP transporter inhibitor ICP47
X
88Human herpesvirus 1Mutation(s): 0 
Gene Names: US12
Membrane protein
mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
Transporter associated with antigen processing (TAP) bound to ICP47
Find proteins for A0A140GKJ0 (Human herpesvirus 1)
Go to UniProtKB:  A0A140GKJ0
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.97 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Howard Hughes Medical InstituteUnited States--

Revision History 

  • Version 1.0: 2017-01-11
    Type: Initial release
  • Version 1.1: 2018-07-18
    Type: Data collection, Experimental preparation