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- EMDB-60114: Cryo-EM structure of the full-length pAg-bound BTN2A1-BTN3A1-BTN3... -

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Basic information

Entry
Database: EMDB / ID: EMD-60114
TitleCryo-EM structure of the full-length pAg-bound BTN2A1-BTN3A1-BTN3A2 complex
Map data
Sample
  • Complex: Human BTN complex
    • Protein or peptide: Butyrophilin subfamily 3 member A2
    • Protein or peptide: Butyrophilin subfamily 2 member A1
    • Protein or peptide: Butyrophilin subfamily 3 member A1
  • Ligand: (2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate
KeywordsReceptor / IMMUNE SYSTEM
Function / homology
Function and homology information


Butyrophilin (BTN) family interactions / T cell mediated immunity / activated T cell proliferation / regulation of cytokine production / positive regulation of cytokine production / lipid metabolic process / positive regulation of type II interferon production / T cell receptor signaling pathway / adaptive immune response / signaling receptor binding ...Butyrophilin (BTN) family interactions / T cell mediated immunity / activated T cell proliferation / regulation of cytokine production / positive regulation of cytokine production / lipid metabolic process / positive regulation of type II interferon production / T cell receptor signaling pathway / adaptive immune response / signaling receptor binding / external side of plasma membrane / membrane / plasma membrane
Similarity search - Function
Butyrophilin subfamily 1/2, SPRY/PRY domain / Butyrophilin subfamily 3, PRY/SPRY domain / : / : / Butyrophilin subfamily 3 member A2-like, Ig-C domain / SPRY-associated domain / SPRY-associated / PRY / Butyrophylin-like, SPRY domain / SPRY domain ...Butyrophilin subfamily 1/2, SPRY/PRY domain / Butyrophilin subfamily 3, PRY/SPRY domain / : / : / Butyrophilin subfamily 3 member A2-like, Ig-C domain / SPRY-associated domain / SPRY-associated / PRY / Butyrophylin-like, SPRY domain / SPRY domain / B30.2/SPRY domain / B30.2/SPRY domain profile. / B30.2/SPRY domain superfamily / Domain in SPla and the RYanodine Receptor. / SPRY domain / Immunoglobulin V-Type / Immunoglobulin V-set domain / Immunoglobulin V-set domain / Immunoglobulin subtype / Immunoglobulin / Concanavalin A-like lectin/glucanase domain superfamily / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold
Similarity search - Domain/homology
Butyrophilin subfamily 3 member A1 / Butyrophilin subfamily 3 member A2 / Butyrophilin subfamily 2 member A1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.0 Å
AuthorsXin W / Huang B / Su Q / Zhou Q
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)32100975 China
CitationJournal: Biorxiv / Year: 2025
Title: Phosphoantigen-Driven Dissociation of Butyrophilin Oligomers Activates gamma delta T Cells
Authors: Xin W / Huang B / Gao W / Zhang W / Hu Y / Liu Y / Liang E / Shi Y / Su Q / Zhou Q
History
DepositionMay 11, 2024-
Header (metadata) releaseNov 26, 2025-
Map releaseNov 26, 2025-
UpdateNov 26, 2025-
Current statusNov 26, 2025Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_60114.png

Downloads & links

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Map

FileDownload / File: emd_60114.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.72 Å/pix.
x 480 pix.
= 345.6 Å		0.72 Å/pix.
x 480 pix.
= 345.6 Å		0.72 Å/pix.
x 480 pix.
= 345.6 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.72 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.06
Minimum - Maximum-0.22196566 - 0.44566393
Average (Standard dev.)-0.000154131 (±0.008216888)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions480480480
Spacing480480480
CellA=B=C: 345.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #1

Fileemd_60114_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_60114_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Human BTN complex

EntireName: Human BTN complex
Components
  • Complex: Human BTN complex
    • Protein or peptide: Butyrophilin subfamily 3 member A2
    • Protein or peptide: Butyrophilin subfamily 2 member A1
    • Protein or peptide: Butyrophilin subfamily 3 member A1
  • Ligand: (2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate

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Supramolecule #1: Human BTN complex

SupramoleculeName: Human BTN complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 213 kDa/nm

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Macromolecule #1: Butyrophilin subfamily 3 member A2

MacromoleculeName: Butyrophilin subfamily 3 member A2 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 35.758699 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MDMRVPAQLL GLLLLWLSGA RCQFSVLGPS GPILAMVGED ADLPCHLFPT MSAETMELKW VSSSLRQVVN VYADGKEVED RQSAPYRGR TSILRDGITA GKAALRIHNV TASDSGKYLC YFQDGDFYEK ALVELKVAAL GSNLHVEVKG YEDGGIHLEC R STGWYPQP ...String:
MDMRVPAQLL GLLLLWLSGA RCQFSVLGPS GPILAMVGED ADLPCHLFPT MSAETMELKW VSSSLRQVVN VYADGKEVED RQSAPYRGR TSILRDGITA GKAALRIHNV TASDSGKYLC YFQDGDFYEK ALVELKVAAL GSNLHVEVKG YEDGGIHLEC R STGWYPQP QIQWSNAKGE NIPAVEAPVV ADGVGLYEVA ASVIMRGGSG EGVSCIIRNS LLGLEKTASI SIADPFFRSA QP WIAALAG TLPILLLLLA GASYFLWRQQ KEITALSSEI ESEQEMKEMG YAATEREISL RESLQEELKR KKIQYLTRGE ESS SDTNKS A

UniProtKB: Butyrophilin subfamily 3 member A2

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Macromolecule #2: Butyrophilin subfamily 2 member A1

MacromoleculeName: Butyrophilin subfamily 2 member A1 / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 60.684453 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MDMRVPAQLL GLLLLWLSGA RCQFIVVGPT DPILATVGEN TTLRCHLSPE KNAEDMEVRW FRSQFSPAVF VYKGGRERTE EQMEEYRGR TTFVSKDISR GSVALVIHNI TAQENGTYRC YFQEGRSYDE AILHLVVAGL GSKPLISMRG HEDGGIRLEC I SRGWYPKP ...String:
MDMRVPAQLL GLLLLWLSGA RCQFIVVGPT DPILATVGEN TTLRCHLSPE KNAEDMEVRW FRSQFSPAVF VYKGGRERTE EQMEEYRGR TTFVSKDISR GSVALVIHNI TAQENGTYRC YFQEGRSYDE AILHLVVAGL GSKPLISMRG HEDGGIRLEC I SRGWYPKP LTVWRDPYGG VAPALKEVSM PDADGLFMVT TAVIIRDKSV RNMSCSINNT LLGQKKESVI FIPESFMPSV SP CAVALPI IVVILMIPIA VCIYWINKLQ KEKKILSGEK EFERETREIA LKELEKERVQ KEEELQVKEK LQEELRWRRT FLH AVDVVL DPDTAHPDLF LSEDRRSVRR CPFRHLGESV PDNPERFDSQ PCVLGRESFA SGKHYWEVEV ENVIEWTVGV CRDS VERKG EVLLIPQNGF WTLEMHKGQY RAVSSPDRIL PLKESLCRVG VFLDYEAGDV SFYNMRDRSH IYTCPRSAFS VPVRP FFRL GCEDSPIFIC PALTGANGVT VPEEGLTLHR VGTHQSLGSS GMDYKDDDDK

UniProtKB: Butyrophilin subfamily 2 member A1

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Macromolecule #3: Butyrophilin subfamily 3 member A1

MacromoleculeName: Butyrophilin subfamily 3 member A1 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 57.158137 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MDMRVPAQLL GLLLLWLSGA RCQFSVLGPS GPILAMVGED ADLPCHLFPT MSAETMELKW VSSSLRQVVN VYADGKEVED RQSAPYRGR TSILRDGITA GKAALRIHNV TASDSGKYLC YFQDGDFYEK ALVELKVAAL GSDLHVDVKG YKDGGIHLEC R STGWYPQP ...String:
MDMRVPAQLL GLLLLWLSGA RCQFSVLGPS GPILAMVGED ADLPCHLFPT MSAETMELKW VSSSLRQVVN VYADGKEVED RQSAPYRGR TSILRDGITA GKAALRIHNV TASDSGKYLC YFQDGDFYEK ALVELKVAAL GSDLHVDVKG YKDGGIHLEC R STGWYPQP QIQWSNNKGE NIPTVEAPVV ADGVGLYAVA ASVIMRGSSG EGVSCTIRSS LLGLEKTASI SIADPFFRSA QR WIAALAG TLPVLLLLLG GAGYFLWQQQ EEKKTQFRKK KREQELREMA WSTMKQEQST RVKLLEELRW RSIQYASRGE RHS AYNEWK KALFKPADVI LDPKTANPIL LVSEDQRSVQ RAKEPQDLPD NPERFNWHYC VLGCESFISG RHYWEVEVGD RKEW HIGVC SKNVQRKGWV KMTPENGFWT MGLTDGNKYR TLTEPRTNLK LPKPPKKVGV FLDYETGDIS FYNAVDGSHI HTFLD VSFS EALYPVFRIL TLEPTALTIC PAGSSG

UniProtKB: Butyrophilin subfamily 3 member A1

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Macromolecule #4: (2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate

MacromoleculeName: (2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate
type: ligand / ID: 4 / Number of copies: 1 / Formula: H6P
Molecular weightTheoretical: 262.092 Da
Chemical component information

ChemComp-H6P:
(2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.0 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 556199
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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