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- PDB-9bgf: Structure of human GlcNAc-1-phosphotransferase complexed with the... -

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Basic information

Entry
Database: PDB / ID: 9bgf
TitleStructure of human GlcNAc-1-phosphotransferase complexed with the donor substrate UDP-GlcNAc
ComponentsN-acetylglucosamine-1-phosphotransferase subunits alpha/beta
KeywordsTRANSFERASE / GlcNAc-1-phosphotransferase / lysosomal hydrolases / mannose 6-phosphate trafficking pathway
Function / homology
Function and homology information


UDP-N-acetylglucosamine-lysosomal-enzyme N-acetylglucosaminephosphotransferase / N-glycan processing to lysosome / UDP-N-acetylglucosamine-lysosomal-enzyme N-acetylglucosaminephosphotransferase activity / secretion of lysosomal enzymes / carbohydrate phosphorylation / lysosome organization / Golgi membrane / calcium ion binding / Golgi apparatus
Similarity search - Function
N-acetylglucosamine-1-phosphotransferase subunit alpha/beta, regulatory domain / Putative GlcNAc-1 phosphotransferase regulatory domain / Stealth protein CR2, conserved region 2 / Stealth protein CR4, conserved region 4 / Stealth protein CR3, conserved region 3 / Stealth protein CR1, conserved region 1 / : / Stealth protein CR2, conserved region 2 / Stealth protein CR1, conserved region 1 / Stealth protein CR3, conserved region 3 ...N-acetylglucosamine-1-phosphotransferase subunit alpha/beta, regulatory domain / Putative GlcNAc-1 phosphotransferase regulatory domain / Stealth protein CR2, conserved region 2 / Stealth protein CR4, conserved region 4 / Stealth protein CR3, conserved region 3 / Stealth protein CR1, conserved region 1 / : / Stealth protein CR2, conserved region 2 / Stealth protein CR1, conserved region 1 / Stealth protein CR3, conserved region 3 / Stealth protein CR4, conserved region 4 / DMAP1-binding Domain / DMAP1-binding Domain / DMAP1-binding domain / DMAP1-binding domain profile. / Notch-like domain superfamily / LNR domain / LNR (Lin-12/Notch) repeat profile. / Notch domain / Domain found in Notch and Lin-12 / EF-Hand 1, calcium-binding site / EF-hand calcium-binding domain. / EF-hand calcium-binding domain profile. / EF-hand domain
Similarity search - Domain/homology
URIDINE-DIPHOSPHATE-N-ACETYLGLUCOSAMINE / N-acetylglucosamine-1-phosphotransferase subunits alpha/beta
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsLi, H. / Li, H.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)NS127292 United States
CitationJournal: J Biol Chem / Year: 2024
Title: Structure of a truncated human GlcNAc-1-phosphotransferase variant reveals the basis for its hyperactivity.
Authors: Hua Li / Balraj Doray / Benjamin C Jennings / Wang-Sik Lee / Lin Liu / Stuart Kornfeld / Huilin Li /
Abstract: Mutations that cause loss of function of GlcNAc-1-phosphotransferase (PTase) lead to the lysosomal storage disorder mucolipidosis II. PTase is the key enzyme of the mannose 6-phosphate (M6P) ...Mutations that cause loss of function of GlcNAc-1-phosphotransferase (PTase) lead to the lysosomal storage disorder mucolipidosis II. PTase is the key enzyme of the mannose 6-phosphate (M6P) targeting system that is responsible for tagging lysosomal hydrolases with the M6P moiety for their delivery to the lysosome. We had previously generated a truncated hyperactive form of PTase termed S1S3 which was shown to notably increase the phosphorylation level of secreted lysosomal enzymes and enhance their uptake by cells. Here, we report the 3.4 Å cryo-EM structure of soluble S1S3 lacking both transmembrane domains and cytosolic tails. The structure reveals a high degree of conservation of the catalytic core to full-length PTase. In this dimeric structure, the EF-hand of one protomer is observed interacting with the conserved region four of the other. In addition, we present a high-quality EM 3D map of the UDP-GlcNAc bound form of the full-length soluble protein showing the key molecular interactions between the nucleotide sugar donor and side chain amino acids of the protein. Finally, although the domain organization of S1S3 is very similar to that of the Drosophila melanogaster (fruit fly) PTase homolog, we establish that the latter does not act on lysosomal hydrolases.
History
DepositionApr 18, 2024Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 26, 2025Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Feb 26, 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: N-acetylglucosamine-1-phosphotransferase subunits alpha/beta
B: N-acetylglucosamine-1-phosphotransferase subunits alpha/beta
hetero molecules


Theoretical massNumber of molelcules
Total (without water)272,71917
Polymers269,5752
Non-polymers3,14415
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Protein , 1 types, 2 molecules AB

#1: Protein N-acetylglucosamine-1-phosphotransferase subunits alpha/beta / GlcNAc-1-phosphotransferase subunits alpha/beta / Stealth protein GNPTAB / UDP-N-acetylglucosamine- ...GlcNAc-1-phosphotransferase subunits alpha/beta / Stealth protein GNPTAB / UDP-N-acetylglucosamine-1-phosphotransferase subunits alpha/beta


Mass: 134787.500 Da / Num. of mol.: 2 / Fragment: UNP residues 44-1209
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: GNPTAB, GNPTA, KIAA1208 / Production host: Cricetulus griseus (Chinese hamster)
References: UniProt: Q3T906, UDP-N-acetylglucosamine-lysosomal-enzyme N-acetylglucosaminephosphotransferase

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Sugars , 2 types, 7 molecules

#2: 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: isolated from a genetically manipulated source
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
#6: 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.: 6 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
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

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Non-polymers , 3 types, 8 molecules

#3: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca / Feature type: SUBJECT OF INVESTIGATION
#4: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mg / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical ChemComp-UD1 / URIDINE-DIPHOSPHATE-N-ACETYLGLUCOSAMINE


Mass: 607.354 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C17H27N3O17P2 / Feature type: SUBJECT OF INVESTIGATION

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Details

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: GlcNAc-1-phosphotransferase / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.268 MDa / Experimental value: YES
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Cricetulus griseus (Chinese hamster)
Buffer solutionpH: 7.8
Buffer component
IDConc.NameFormulaBuffer-ID
175 mMpotassium chlorideKCl1
220 mMHEPES1
310 mM2-mercaptoethanol1
SpecimenConc.: 0.15 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/1
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 299 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: OTHER
Electron lensMode: BRIGHT FIELD / Nominal magnification: 105000 X / Nominal defocus max: 1600 nm / Nominal defocus min: 1000 nm / Cs: 2.7 mm / C2 aperture diameter: 70 µm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 193 K / Temperature (min): 193 K / Residual tilt: 0.05 mradians
Image recordingAverage exposure time: 1 sec. / Electron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 24130
Image scansWidth: 5760 / Height: 4092

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Processing

EM softwareName: PHENIX / Version: 1.21.1_5286: / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 2859876
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 876204 / Symmetry type: POINT
Atomic model buildingPDB-ID: 7s05

7s05


Accession code: 7s05 / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0037493
ELECTRON MICROSCOPYf_angle_d0.50910150
ELECTRON MICROSCOPYf_dihedral_angle_d15.4733027
ELECTRON MICROSCOPYf_chiral_restr0.0431119
ELECTRON MICROSCOPYf_plane_restr0.0041293

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