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- PDB-9kxu: Structure of human B0AT1-ACE2 complex with compound 2 -

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Basic information

Entry
Database: PDB / ID: 9kxu
TitleStructure of human B0AT1-ACE2 complex with compound 2
Components
  • Angiotensin-converting enzyme 2
  • Sodium-dependent neutral amino acid transporter B(0)AT1
KeywordsTRANSPORT PROTEIN / Inhibitor / amino acid transporter / SLC6
Function / homology
Function and homology information


Defective SLC6A19 causes Hartnup disorder (HND) / Defective SLC6A19 causes Hartnup disorder (HND) / neutral amino acid transport / neutral L-amino acid transmembrane transporter activity / Amino acid transport across the plasma membrane / amino acid transmembrane transporter activity / symporter activity / SLC-mediated transport of neurotransmitters / positive regulation of amino acid transport / amino acid transport ...Defective SLC6A19 causes Hartnup disorder (HND) / Defective SLC6A19 causes Hartnup disorder (HND) / neutral amino acid transport / neutral L-amino acid transmembrane transporter activity / Amino acid transport across the plasma membrane / amino acid transmembrane transporter activity / symporter activity / SLC-mediated transport of neurotransmitters / positive regulation of amino acid transport / amino acid transport / angiotensin-converting enzyme 2 / positive regulation of L-proline import across plasma membrane / Hydrolases; Acting on peptide bonds (peptidases); Metallocarboxypeptidases / angiotensin-mediated drinking behavior / positive regulation of gap junction assembly / regulation of systemic arterial blood pressure by renin-angiotensin / tryptophan transport / regulation of cardiac conduction / maternal process involved in female pregnancy / peptidyl-dipeptidase activity / regulation of vasoconstriction / transporter activator activity / Metabolism of Angiotensinogen to Angiotensins / carboxypeptidase activity / angiotensin maturation / viral life cycle / Attachment and Entry / receptor-mediated endocytosis of virus by host cell / metallocarboxypeptidase activity / positive regulation of cardiac muscle contraction / response to nutrient / regulation of cytokine production / sodium ion transmembrane transport / blood vessel diameter maintenance / negative regulation of smooth muscle cell proliferation / brush border membrane / negative regulation of ERK1 and ERK2 cascade / positive regulation of reactive oxygen species metabolic process / metallopeptidase activity / endocytic vesicle membrane / regulation of cell population proliferation / virus receptor activity / regulation of inflammatory response / endopeptidase activity / viral translation / Potential therapeutics for SARS / Induction of Cell-Cell Fusion / membrane fusion / entry receptor-mediated virion attachment to host cell / Attachment and Entry / receptor-mediated virion attachment to host cell / cilium / apical plasma membrane / membrane raft / endoplasmic reticulum lumen / symbiont entry into host cell / cell surface / negative regulation of transcription by RNA polymerase II / extracellular space / extracellular exosome / extracellular region / zinc ion binding / identical protein binding / membrane / plasma membrane
Similarity search - Function
Neutral amino acid SLC6 transporter / Sodium:neurotransmitter symporter family signature 1. / Sodium:neurotransmitter symporter / Sodium:neurotransmitter symporter superfamily / Sodium:neurotransmitter symporter family / Sodium:neurotransmitter symporter family profile. / Collectrin domain / Renal amino acid transporter / Collectrin-like domain profile. / Peptidase M2, peptidyl-dipeptidase A ...Neutral amino acid SLC6 transporter / Sodium:neurotransmitter symporter family signature 1. / Sodium:neurotransmitter symporter / Sodium:neurotransmitter symporter superfamily / Sodium:neurotransmitter symporter family / Sodium:neurotransmitter symporter family profile. / Collectrin domain / Renal amino acid transporter / Collectrin-like domain profile. / Peptidase M2, peptidyl-dipeptidase A / Angiotensin-converting enzyme / Peptidase family M2 domain profile. / Neutral zinc metallopeptidases, zinc-binding region signature.
Similarity search - Domain/homology
: / Sodium-dependent neutral amino acid transporter B(0)AT1 / Angiotensin-converting enzyme 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.87 Å
AuthorsHiraizumi, M. / Miyaguchi, I.
Funding support1items
OrganizationGrant numberCountry
Not funded
CitationJournal: To Be Published
Title: Structure-guided development of a potent human B0AT1 inhibitor effective in a mouse model of phenylketonuria
Authors: Imazu, T. / Akashi, T. / Hiraizumi, M. / Inui, Y. / Sasaki, W. / Takahashi, T. / Todoroki, H. / Kumanomidou, T. / Hisano, H. / Asada, H. / Kusakizako, T. / Nishizawa, T. / Iwata, S. / Nureki, O. / Miyaguchi, I.
History
DepositionDec 7, 2024Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 10, 2025Provider: repository / Type: Initial release
Revision 1.0Dec 10, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Dec 10, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 10, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 10, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 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
A: Sodium-dependent neutral amino acid transporter B(0)AT1
B: Angiotensin-converting enzyme 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)166,9495
Polymers166,0032
Non-polymers9463
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 Sodium-dependent neutral amino acid transporter B(0)AT1 / Solute carrier family 6 member 19 / System B(0) neutral amino acid transporter AT1


Mass: 73289.359 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SLC6A19, B0AT1 / Production host: Homo sapiens (human) / References: UniProt: Q695T7
#2: Protein Angiotensin-converting enzyme 2 / Angiotensin-converting enzyme homolog / ACEH / Angiotensin-converting enzyme-related ...Angiotensin-converting enzyme homolog / ACEH / Angiotensin-converting enzyme-related carboxypeptidase / ACE-related carboxypeptidase / Metalloprotease MPROT15


Mass: 92713.898 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: ACE2, UNQ868/PRO1885 / Production host: Homo sapiens (human)
References: UniProt: Q9BYF1, angiotensin-converting enzyme 2, Hydrolases; Acting on peptide bonds (peptidases); Metallocarboxypeptidases
#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#4: 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.: 1 / 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
#5: Chemical ChemComp-A1L6V / (~{E})-~{N}-[2-(dimethylamino)-2-oxidanylidene-ethyl]-3-[4-(trifluoromethyl)phenyl]prop-2-enamide


Mass: 300.276 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C14H15F3N2O2 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
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: Ternary complex of B0AT1, ACE2 and inhibitor / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Molecular weightValue: 0.16 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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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: 4D-STEM / Nominal defocus max: 1600 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 7.6 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM softwareName: REFMAC / Version: 5.8.0267 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.87 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 125620 / Symmetry type: POINT
RefinementResolution: 2.87→2.87 Å / Cor.coef. Fo:Fc: 0.796 / ESU R: 0.314
Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES
Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflection
Rwork0.37004 --
obs0.37004 71409 100 %
Solvent computationSolvent model: PARAMETERS FOR MASK CACLULATION
Displacement parametersBiso mean: 76.676 Å2
Refinement stepCycle: 1 / Total: 5056
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
ELECTRON MICROSCOPYr_bond_refined_d0.010.0135202
ELECTRON MICROSCOPYr_bond_other_d0.0340.0174931
ELECTRON MICROSCOPYr_angle_refined_deg1.621.6367102
ELECTRON MICROSCOPYr_angle_other_deg2.3481.5711310
ELECTRON MICROSCOPYr_dihedral_angle_1_deg4.9285624
ELECTRON MICROSCOPYr_dihedral_angle_2_deg35.50922.227229
ELECTRON MICROSCOPYr_dihedral_angle_3_deg15.61215810
ELECTRON MICROSCOPYr_dihedral_angle_4_deg20.1171519
ELECTRON MICROSCOPYr_chiral_restr0.0810.2686
ELECTRON MICROSCOPYr_gen_planes_refined0.0090.025760
ELECTRON MICROSCOPYr_gen_planes_other0.0140.021248
ELECTRON MICROSCOPYr_nbd_refined
ELECTRON MICROSCOPYr_nbd_other
ELECTRON MICROSCOPYr_nbtor_refined
ELECTRON MICROSCOPYr_nbtor_other
ELECTRON MICROSCOPYr_xyhbond_nbd_refined
ELECTRON MICROSCOPYr_xyhbond_nbd_other
ELECTRON MICROSCOPYr_metal_ion_refined
ELECTRON MICROSCOPYr_metal_ion_other
ELECTRON MICROSCOPYr_symmetry_vdw_refined
ELECTRON MICROSCOPYr_symmetry_vdw_other
ELECTRON MICROSCOPYr_symmetry_hbond_refined
ELECTRON MICROSCOPYr_symmetry_hbond_other
ELECTRON MICROSCOPYr_symmetry_metal_ion_refined
ELECTRON MICROSCOPYr_symmetry_metal_ion_other
ELECTRON MICROSCOPYr_mcbond_it9.9887.272511
ELECTRON MICROSCOPYr_mcbond_other9.9887.272510
ELECTRON MICROSCOPYr_mcangle_it14.18110.9553130
ELECTRON MICROSCOPYr_mcangle_other14.17910.9553131
ELECTRON MICROSCOPYr_scbond_it12.1358.6372691
ELECTRON MICROSCOPYr_scbond_other12.1338.6382692
ELECTRON MICROSCOPYr_scangle_it
ELECTRON MICROSCOPYr_scangle_other18.42112.4673973
ELECTRON MICROSCOPYr_long_range_B_refined27.4922631
ELECTRON MICROSCOPYr_long_range_B_other27.49222632
ELECTRON MICROSCOPYr_rigid_bond_restr
ELECTRON MICROSCOPYr_sphericity_free
ELECTRON MICROSCOPYr_sphericity_bonded
LS refinement shellResolution: 2.7→2.77 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0 0 -
Rwork1.036 5356 -
obs--100 %

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