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- PDB-8qsk: Cryo-EM structure of human SLC15A4 dimer in outward open state in... -

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Basic information

Entry
Database: PDB / ID: 8qsk
TitleCryo-EM structure of human SLC15A4 dimer in outward open state in MSP1D1 nanodisc
ComponentsSolute carrier family 15 member 4
KeywordsMEMBRANE PROTEIN / Solute carrier / transporter / SLC / MFS / major facilitator superfamily / lysosome
Function / homology
Function and homology information


histidine transport / mast cell homeostasis / L-histidine transmembrane export from vacuole / L-histidine transmembrane transporter activity / peptidoglycan transmembrane transporter activity / Proton/oligopeptide cotransporters / positive regulation of toll-like receptor 8 signaling pathway / peptidoglycan transport / positive regulation of toll-like receptor 7 signaling pathway / regulation of isotype switching to IgG isotypes ...histidine transport / mast cell homeostasis / L-histidine transmembrane export from vacuole / L-histidine transmembrane transporter activity / peptidoglycan transmembrane transporter activity / Proton/oligopeptide cotransporters / positive regulation of toll-like receptor 8 signaling pathway / peptidoglycan transport / positive regulation of toll-like receptor 7 signaling pathway / regulation of isotype switching to IgG isotypes / SLC15A4:TASL-dependent IRF5 activation / positive regulation of nucleotide-binding oligomerization domain containing 1 signaling pathway / dipeptide import across plasma membrane / positive regulation of toll-like receptor 9 signaling pathway / peptide:proton symporter activity / dipeptide transmembrane transporter activity / regulation of nucleotide-binding domain, leucine rich repeat containing receptor signaling pathway / positive regulation of nucleotide-binding oligomerization domain containing 2 signaling pathway / endolysosome membrane / positive regulation of innate immune response / specific granule membrane / monoatomic ion transport / protein transport / early endosome membrane / innate immune response / lysosomal membrane / Neutrophil degranulation / membrane / plasma membrane
Similarity search - Function
PTR2 family proton/oligopeptide symporters signature 2. / PTR2 family proton/oligopeptide symporter, conserved site / Proton-dependent oligopeptide transporter family / POT family / MFS transporter superfamily
Similarity search - Domain/homology
Chem-PGT / CHOLESTEROL HEMISUCCINATE / Solute carrier family 15 member 4
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsRehan, S. / Matsuoka, R. / Jazayeri, A. / Duerr, K.L.
Funding support1items
OrganizationGrant numberCountry
Other private
CitationJournal: To Be Published
Title: Cryo-EM structure of human SLC15A4 dimer in outward open state in MSP1D1 nanodisc
Authors: Rehan, S. / Matsuoka, R. / Jazayeri, A. / Duerr, K.L.
History
DepositionOct 10, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Nov 1, 2023Provider: repository / Type: Initial release
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Revision 1.1Nov 13, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification
Revision 1.2Jul 9, 2025Group: Data collection / Category: em_admin / em_software / Item: _em_admin.last_update / _em_software.name
Revision 1.1Jul 9, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data processing / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_software / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_software.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Solute carrier family 15 member 4
C: Solute carrier family 15 member 4
hetero molecules


Theoretical massNumber of molelcules
Total (without water)131,79318
Polymers124,0082
Non-polymers7,78516
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 Solute carrier family 15 member 4


Mass: 62004.035 Da / Num. of mol.: 2 / Mutation: L14A, L15A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC15A4 / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q8N697
#2: Chemical
ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 12 / Source method: obtained synthetically / Formula: C31H50O4
#3: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
#4: Chemical ChemComp-PGT / (1S)-2-{[{[(2R)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL STEARATE / PHOSPHATIDYLGLYCEROL / 1-PALMITOYL-2-OLEOYL-SN-GLYCERO-3-[PHOSPHO-RAC-(1-GLYCEROL)](SODIUM SALT)


Mass: 751.023 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C40H79O10P / Comment: phospholipid*YM
Has ligand of interestN
Has protein modificationY

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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: SLC15A4 in nanodisc / Type: COMPLEX / Details: POPC, POPE, POPG / Entity ID: #1 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 6.5 / Details: 20mM MES pH6.5/ 150mM NaCl,
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 298 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: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 40 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM software
IDNameVersionCategory
2EPU2image acquisition
8PHENIXmodel refinement
11cryoSPARCfinal Euler assignment
13cryoSPARC3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 111343 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0038734
ELECTRON MICROSCOPYf_angle_d0.57711920
ELECTRON MICROSCOPYf_dihedral_angle_d12.8833034
ELECTRON MICROSCOPYf_chiral_restr0.0381394
ELECTRON MICROSCOPYf_plane_restr0.0041410

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