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- PDB-9och: Transporter associated with antigen processing (TAP) bound to the... -

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Basic information

Entry
Database: PDB / ID: 9och
TitleTransporter associated with antigen processing (TAP) bound to the viral protein hUS6 in the outward-facing open state
Components
  • (Antigen peptide transporter ...) x 2
  • TAP transport inhibitor US6
KeywordsMEMBRANE PROTEIN / ABC transporter / antigen processing / peptide transporter / immune evasion / cytomegalovirus / herpesvirus
Function / homology
Function and homology information


antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent / tapasin binding / ABC-type peptide antigen transporter activity / ABC-type antigen peptide transporter / TAP complex / ABC-type peptide transporter activity / TAP2 binding / TAP1 binding / peptide antigen transport / MHC class Ib protein binding ...antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent / tapasin binding / ABC-type peptide antigen transporter activity / ABC-type antigen peptide transporter / TAP complex / ABC-type peptide transporter activity / TAP2 binding / TAP1 binding / peptide antigen transport / MHC class Ib protein binding / cytosol to endoplasmic reticulum transport / symbiont-mediated suppression of host antigen processing and presentation of peptide antigen via MHC class I / peptide transport / peptide transmembrane transporter activity / MHC class I protein binding / antigen processing and presentation of endogenous peptide antigen via MHC class I via ER pathway, TAP-dependent / molecular sequestering activity / endoplasmic reticulum-Golgi intermediate compartment membrane / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / response to molecule of bacterial origin / MHC class I peptide loading complex / defense response / T cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I / ADP binding / peptide antigen binding / positive regulation of T cell mediated cytotoxicity / transmembrane transport / centriolar satellite / phagocytic vesicle membrane / protein transport / ER-Phagosome pathway / adaptive immune response / nuclear speck / host cell endoplasmic reticulum membrane / endoplasmic reticulum membrane / endoplasmic reticulum / protein homodimerization activity / ATP hydrolysis activity / ATP binding / metal ion binding / membrane
Similarity search - Function
Viral unique short region 6 / Viral unique short region 6 / Antigen peptide transporter 2 / ABC transporter Tap-like / Type 1 protein exporter / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site ...Viral unique short region 6 / Viral unique short region 6 / Antigen peptide transporter 2 / ABC transporter Tap-like / Type 1 protein exporter / ABC transporter transmembrane region / ABC transporter type 1, transmembrane domain / ABC transporter integral membrane type-1 fused domain profile. / ABC transporter type 1, transmembrane domain superfamily / ABC transporter-like, conserved site / ABC transporters family signature. / ABC transporter / ABC transporter-like, ATP-binding domain / ATP-binding cassette, ABC transporter-type domain profile. / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / ADENOSINE-5'-TRIPHOSPHATE / Unique short US6 glycoprotein / Antigen peptide transporter 1 / Antigen peptide transporter 2
Similarity search - Component
Biological speciesHomo sapiens (human)
Human betaherpesvirus 5
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsLee, J. / Manon, V. / Chen, J.
Funding support United States, 2items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)T32GM007739 United States
CitationJournal: To Be Published
Title: Transporter associated with antigen processing (TAP) bound to the viral protein US6 in the outward-facing open state
Authors: Lee, J. / Manon, V. / Chen, J.
History
DepositionApr 24, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Sep 10, 2025Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: Additional map / Part number: 1 / Data content type: Additional map / Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Sep 10, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
B: Antigen peptide transporter 2
D: TAP transport inhibitor US6
A: Antigen peptide transporter 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)198,6277
Polymers197,6443
Non-polymers9834
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Antigen peptide transporter ... , 2 types, 2 molecules BA

#1: Protein Antigen peptide transporter 2 / APT2 / ATP-binding cassette sub-family B member 3 / Peptide supply factor 2 / Peptide transporter ...APT2 / ATP-binding cassette sub-family B member 3 / Peptide supply factor 2 / Peptide transporter PSF2 / PSF-2 / Peptide transporter TAP2 / Peptide transporter involved in antigen processing 2 / Really interesting new gene 11 protein


Mass: 75736.508 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TAP2, ABCB3, PSF2, RING11, Y1 / Production host: Homo sapiens (human) / Strain (production host): HEK293 GnTI- / References: UniProt: Q03519
#3: Protein Antigen peptide transporter 1 / APT1 / ATP-binding cassette sub-family B member 2 / Peptide supply factor 1 / Peptide transporter ...APT1 / ATP-binding cassette sub-family B member 2 / Peptide supply factor 1 / Peptide transporter PSF1 / PSF-1 / Peptide transporter TAP1 / Peptide transporter involved in antigen processing 1 / Really interesting new gene 4 protein / RING4


Mass: 95839.172 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: C-terminally fused to a TEV protease cut site and Spycatcher
Source: (gene. exp.) Homo sapiens (human) / Gene: TAP1, ABCB2, PSF1, RING4, Y3 / Production host: Homo sapiens (human) / Strain (production host): HEK293 GnTI-
References: UniProt: Q03518, ABC-type antigen peptide transporter

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Protein , 1 types, 1 molecules D

#2: Protein TAP transport inhibitor US6 / Protein HXLF6 / gpUS6


Mass: 26067.955 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: C-terminally fused to a TEV protease cut site, Spytag, a Precission protease site, and eGFP.
Source: (gene. exp.) Human betaherpesvirus 5 / Gene: US6 / Production host: Homo sapiens (human) / Strain (production host): HEK293 GnTI- / References: UniProt: P14334

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Non-polymers , 3 types, 4 molecules

#4: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Feature type: SUBJECT OF INVESTIGATION / Comment: ADP, energy-carrying molecule*YM
#5: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical ChemComp-ATP / ADENOSINE-5'-TRIPHOSPHATE


Mass: 507.181 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C10H16N5O13P3 / Feature type: SUBJECT OF INVESTIGATION / Comment: ATP, energy-carrying molecule*YM

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Details

Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Ternary complex of the heterodimer TAP1 and TAP2 bound to the viral inhibitor US6
Type: COMPLEX
Details: TAP1 is C-terminally tagged with Spycatcher and US6 is C-terminally tagged with GFP and Spytag
Entity ID: #1-#3 / Source: RECOMBINANT
Molecular weightValue: 0.197 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human) / Strain: HEK293S GnTI-
Buffer solutionpH: 6.5
Buffer component
IDConc.NameFormulaBuffer-ID
150 mM2-[4-(2-Hydroxyethyl)piperazin-1-yl]ethane-1-sulfonic acidHEPES1
2200 mMpotassium chlorideKCl1
31 mMdithiothreitolDTT1
40.004 %glyco-diosgeninGDN1
SpecimenConc.: 6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 279 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 800 nm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1crYOLO1.8.3particle selection
2SerialEM3.7image acquisition
4CTFFINDCTF correction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 3395985
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 14445 / Symmetry type: POINT
RefinementHighest resolution: 3.3 Å / Cross valid method: NONE
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0029059
ELECTRON MICROSCOPYf_angle_d0.612292
ELECTRON MICROSCOPYf_dihedral_angle_d4.7871246
ELECTRON MICROSCOPYf_chiral_restr0.041423
ELECTRON MICROSCOPYf_plane_restr0.0041569

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