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- EMDB-20834: Structure of itraconazole-bound NPC1 -

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Basic information

Entry
Database: EMDB / ID: EMD-20834
TitleStructure of itraconazole-bound NPC1
Map data
Sample
  • Complex: NPC1 and itraconazole-Br complex
    • Protein or peptide: NPC intracellular cholesterol transporter 1
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: 4-(3-bromo-4-{4-[4-({(2R,4S)-2-(2,4-dichlorophenyl)-2-[(1H-1,2,4-triazol-1-yl)methyl]-1,3-dioxolan-4-yl}methoxy)phenyl]piperazin-1-yl}phenyl)-2-[(2S)-butan-2-yl]-2,4-dihydro-3H-1,2,4-triazol-3-one
KeywordsNiemann-Pick C disease / cholesterol transport / sterol-sensing domain / MEMBRANE PROTEIN
Function / homology
Function and homology information


cyclodextrin metabolic process / cholesterol storage / membrane raft organization / intracellular cholesterol transport / intracellular lipid transport / sterol transport / intestinal cholesterol absorption / LDL clearance / negative regulation of epithelial cell apoptotic process / programmed cell death ...cyclodextrin metabolic process / cholesterol storage / membrane raft organization / intracellular cholesterol transport / intracellular lipid transport / sterol transport / intestinal cholesterol absorption / LDL clearance / negative regulation of epithelial cell apoptotic process / programmed cell death / cholesterol transfer activity / cholesterol transport / bile acid metabolic process / establishment of protein localization to membrane / adult walking behavior / cholesterol efflux / lysosomal transport / cholesterol binding / cellular response to steroid hormone stimulus / negative regulation of macroautophagy / : / cellular response to low-density lipoprotein particle stimulus / response to cadmium ion / cholesterol metabolic process / negative regulation of TORC1 signaling / neurogenesis / cholesterol homeostasis / macroautophagy / liver development / autophagy / endocytosis / late endosome membrane / transmembrane signaling receptor activity / nuclear envelope / signaling receptor activity / virus receptor activity / gene expression / lysosome / membrane raft / response to xenobiotic stimulus / lysosomal membrane / symbiont entry into host cell / perinuclear region of cytoplasm / endoplasmic reticulum / Golgi apparatus / extracellular exosome / extracellular region / membrane / plasma membrane
Similarity search - Function
NPC1-like / Niemann-Pick C1, N-terminal / : / Niemann-Pick C1 N terminus / NPC1, middle luminal domain / : / Sterol-sensing domain of SREBP cleavage-activation / Sterol-sensing domain (SSD) profile. / Sterol-sensing domain
Similarity search - Domain/homology
NPC intracellular cholesterol transporter 1
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.02 Å
AuthorsLong T / Li X
CitationJournal: Nat Commun / Year: 2020
Title: Structural basis for itraconazole-mediated NPC1 inhibition.
Authors: Tao Long / Xiaofeng Qi / Abdirahman Hassan / Qiren Liang / Jef K De Brabander / Xiaochun Li /
Abstract: Niemann-Pick C1 (NPC1), a lysosomal protein of 13 transmembrane helices (TMs) and three lumenal domains, exports low-density-lipoprotein (LDL)-derived cholesterol from lysosomes. TMs 3-7 of NPC1 ...Niemann-Pick C1 (NPC1), a lysosomal protein of 13 transmembrane helices (TMs) and three lumenal domains, exports low-density-lipoprotein (LDL)-derived cholesterol from lysosomes. TMs 3-7 of NPC1 comprise the Sterol-Sensing Domain (SSD). Previous studies suggest that mutation of the NPC1-SSD or the addition of the anti-fungal drug itraconazole abolishes NPC1 activity in cells. However, the itraconazole binding site and the mechanism of NPC1-mediated cholesterol transport remain unknown. Here, we report a cryo-EM structure of human NPC1 bound to itraconazole, which reveals how this binding site in the center of NPC1 blocks a putative lumenal tunnel linked to the SSD. Functional assays confirm that blocking this tunnel abolishes NPC1-mediated cholesterol egress. Intriguingly, the palmitate anchor of Hedgehog occupies a similar site in the homologous tunnel of Patched, suggesting a conserved mechanism for sterol transport in this family of proteins and establishing a central function of their SSDs.
History
DepositionOct 15, 2019-
Header (metadata) releaseDec 4, 2019-
Map releaseJan 15, 2020-
UpdateNov 13, 2024-
Current statusNov 13, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0069
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by height
  • Surface level: 0.0069
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6uox
  • Surface level: 0.0069
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_20834.png

Downloads & links

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Map

FileDownload / File: emd_20834.map.gz / Format: CCP4 / Size: 163.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.66 Å/pix.
x 350 pix.
= 231. Å		0.66 Å/pix.
x 350 pix.
= 231. Å		0.66 Å/pix.
x 350 pix.
= 231. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.66 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0069 / Movie #1: 0.0069
Minimum - Maximum-0.015141401 - 0.033291336
Average (Standard dev.)0.000021229456 (±0.0011125082)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions350350350
Spacing350350350
CellA=B=C: 231.00002 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.660.660.66
M x/y/z350350350
origin x/y/z0.0000.0000.000
length x/y/z231.000231.000231.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS350350350
D min/max/mean-0.0150.0330.000

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Supplemental data

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Sample components

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Entire : NPC1 and itraconazole-Br complex

EntireName: NPC1 and itraconazole-Br complex
Components
  • Complex: NPC1 and itraconazole-Br complex
    • Protein or peptide: NPC intracellular cholesterol transporter 1
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: 4-(3-bromo-4-{4-[4-({(2R,4S)-2-(2,4-dichlorophenyl)-2-[(1H-1,2,4-triazol-1-yl)methyl]-1,3-dioxolan-4-yl}methoxy)phenyl]piperazin-1-yl}phenyl)-2-[(2S)-butan-2-yl]-2,4-dihydro-3H-1,2,4-triazol-3-one

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Supramolecule #1: NPC1 and itraconazole-Br complex

SupramoleculeName: NPC1 and itraconazole-Br complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: NPC intracellular cholesterol transporter 1

MacromoleculeName: NPC intracellular cholesterol transporter 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 143.315016 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MTARGLALGL LLLLLCPAQV FSQSCVWYGE CGIAYGDKRY NCEYSGPPKP LPKDGYDLVQ ELCPGFFFGN VSLCCDVRQL QTLKDNLQL PLQFLSRCPS CFYNLLNLFC ELTCSPRQSQ FLNVTATEDY VDPVTNQTKT NVKELQYYVG QSFANAMYNA C RDVEAPSS ...String:
MTARGLALGL LLLLLCPAQV FSQSCVWYGE CGIAYGDKRY NCEYSGPPKP LPKDGYDLVQ ELCPGFFFGN VSLCCDVRQL QTLKDNLQL PLQFLSRCPS CFYNLLNLFC ELTCSPRQSQ FLNVTATEDY VDPVTNQTKT NVKELQYYVG QSFANAMYNA C RDVEAPSS NDKALGLLCG KDADACNATN WIEYMFNKDN GQAPFTITPV FSDFPVHGME PMNNATKGCD ESVDEVTAPC SC QDCSIVC GPKPQPPPPP APWTILGLDA MYVIMWITYM AFLLVFFGAF FAVWCYRKRY FVSEYTPIDS NIAFSVNASD KGE ASCCDP VSAAFEGCLR RLFTRWGSFC VRNPGCVIFF SLVFITACSS GLVFVRVTTN PVDLWSAPSS QARLEKEYFD QHFG PFFRT EQLIIRAPLT DKHIYQPYPS GADVPFGPPL DIQILHQVLD LQIAIENITA SYDNETVTLQ DICLAPLSPY NTNCT ILSV LNYFQNSHSV LDHKKGDDFF VYADYHTHFL YCVRAPASLN DTSLLHDPCL GTFGGPVFPW LVLGGYDDQN YNNATA LVI TFPVNNYYND TEKLQRAQAW EKEFINFVKN YKNPNLTISF TAERSIEDEL NRESDSDVFT VVISYAIMFL YISLALG HM KSCRRLLVDS KVSLGIAGIL IVLSSVACSL GVFSYIGLPL TLIVIEVIPF LVLAVGVDNI FILVQAYQRD ERLQGETL D QQLGRVLGEV APSMFLSSFS ETVAFFLGAL SVMPAVHTFS LFAGLAVFID FLLQITCFVS LLGLDIKRQE KNRLDIFCC VRGAEDGTSV QASESCLFRF FKNSYSPLLL KDWMRPIVIA IFVGVLSFSI AVLNKVDIGL DQSLSMPDDS YMVDYFKSIS QYLHAGPPV YFVLEEGHDY TSSKGQNMVC GGMGCNNDSL VQQIFNAAQL DNYTRIGFAP SSWIDDYFDW VKPQSSCCRV D NITDQFCN ASVVDPACVR CRPLTPEGKQ RPQGGDFMRF LPMFLSDNPN PKCGKGGHAA YSSAVNILLG HGTRVGATYF MT YHTVLQT SADFIDALKK ARLIASNVTE TMGINGSAYR VFPYSVFYVF YEQYLTIIDD TIFNLGVSLG AIFLVTMVLL GCE LWSAVI MCATIAMVLV NMFGVMWLWG ISLNAVSLVN LVMSCGISVE FCSHITRAFT VSMKGSRVER AEEALAHMGS SVFS GITLT KFGGIVVLAF AKSQIFQIFY FRMYLAMVLL GATHGLIFLP VLLSYIGPSV NKAKSCATEE RYKGTERERL LNFWS HPQF EK

UniProtKB: NPC intracellular cholesterol transporter 1

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Macromolecule #4: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 4 / Number of copies: 8 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #5: 4-(3-bromo-4-{4-[4-({(2R,4S)-2-(2,4-dichlorophenyl)-2-[(1H-1,2,4-...

MacromoleculeName: 4-(3-bromo-4-{4-[4-({(2R,4S)-2-(2,4-dichlorophenyl)-2-[(1H-1,2,4-triazol-1-yl)methyl]-1,3-dioxolan-4-yl}methoxy)phenyl]piperazin-1-yl}phenyl)-2-[(2S)-butan-2-yl]-2,4-dihydro-3H-1,2,4-triazol-3-one
type: ligand / ID: 5 / Number of copies: 1 / Formula: QDG
Molecular weightTheoretical: 784.529 Da
Chemical component information

ChemComp-QDG:
4-(3-bromo-4-{4-[4-({(2R,4S)-2-(2,4-dichlorophenyl)-2-[(1H-1,2,4-triazol-1-yl)methyl]-1,3-dioxolan-4-yl}methoxy)phenyl]piperazin-1-yl}phenyl)-2-[(2S)-butan-2-yl]-2,4-dihydro-3H-1,2,4-triazol-3-one

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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: GATAN K3 (6k x 4k) / Average electron dose: 80.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: DARK FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
Final reconstructionResolution.type: BY AUTHOR / Resolution: 4.02 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 209612
Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: NOT APPLICABLE

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