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- PDB-8t4j: Transporter associated with antigen processing (TAP) bound to the... -

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Basic information

Entry
Database: PDB / ID: 8t4j
TitleTransporter associated with antigen processing (TAP) bound to the 14-mer peptide LPAVVGLSPGEQEY
Components
  • Antigen peptide transporter 1
  • Antigen peptide transporter 2
  • HLA-B35 specific peptide
KeywordsMEMBRANE PROTEIN / ABC transporter / antigen processing / peptide transporter
Function / homology
Function and homology information


antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent / ABC-type peptide transporter activity / tapasin binding / ABC-type antigen peptide transporter / ABC-type peptide antigen transporter activity / TAP complex / oligopeptide export from mitochondrion / TAP1 binding / TAP2 binding / peptide antigen transport ...antigen processing and presentation of endogenous peptide antigen via MHC class Ib via ER pathway, TAP-dependent / ABC-type peptide transporter activity / tapasin binding / ABC-type antigen peptide transporter / ABC-type peptide antigen transporter activity / TAP complex / oligopeptide export from mitochondrion / TAP1 binding / TAP2 binding / peptide antigen transport / MHC class Ib protein binding / cytosol to endoplasmic reticulum transport / ABC-type oligopeptide transporter activity / 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 / centriolar satellite / 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 / T cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I / transmembrane transport / ADP binding / defense response / positive regulation of T cell mediated cytotoxicity / phagocytic vesicle membrane / peptide antigen binding / protein transport / ER-Phagosome pathway / adaptive immune response / mitochondrial inner membrane / nuclear speck / endoplasmic reticulum membrane / endoplasmic reticulum / protein homodimerization activity / ATP hydrolysis activity / ATP binding / membrane / metal ion binding
Similarity search - Function
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 ...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
Antigen peptide transporter 1 / Antigen peptide transporter 2
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.9 Å
AuthorsLee, J. / Oldham, M.L. / Chen, J.
Funding support United States, 1items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: To Be Published
Title: Transporter associated with antigen processing (TAP) bound to the 14-mer peptide LPAVVGLSPGEQEY
Authors: Lee, J. / Oldham, M.L. / Chen, J.
History
DepositionJun 9, 2023Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jun 19, 2024Provider: 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
A: Antigen peptide transporter 1
C: HLA-B35 specific peptide


Theoretical massNumber of molelcules
Total (without water)158,2293
Polymers158,2293
Non-polymers00
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

#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 / Cell line (production host): HEK293S GnTI- / Production host: Homo sapiens (human) / References: UniProt: Q03519
#2: 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


Mass: 81034.289 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TAP1, ABCB2, PSF1, RING4, Y3 / Cell line (production host): HEK293S GnTI- / Production host: Homo sapiens (human) / References: UniProt: Q03518
#3: Protein/peptide HLA-B35 specific peptide


Mass: 1458.611 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)

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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: Transporter associated with antigen processing bound to the 14-mer peptide LPAVVGLSPGEQEY
Type: COMPLEX / Details: Complex of TAP1 and TAP2 / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightValue: 0.156 MDa / Experimental value: YES
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
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R0.6/1
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: FEI TITAN 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
13cryoSPARC43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 1317654
3D reconstructionResolution: 3.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 69408 / Symmetry type: POINT
RefinementCross valid method: NONE

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