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- PDB-6tbu: Structure of Drosophila melanogaster Dispatched -

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Basic information

Entry
Database: PDB / ID: 6tbu
TitleStructure of Drosophila melanogaster Dispatched
ComponentsProtein dispatched
KeywordsMEMBRANE PROTEIN / RND transporter / transmembrane domain / ectodomain / cholesteryl hemisuccinate / detergent micelle / digitonin / monomer
Function / homology
Function and homology information


Formation and transport of the N-HH ligand / cytoneme / wing disc pattern formation / patched ligand maturation / segment polarity determination / germ cell migration / smoothened signaling pathway / membrane / plasma membrane
Similarity search - Function
: / : / Sterol-sensing domain of SREBP cleavage-activation / Sterol-sensing domain (SSD) profile. / Sterol-sensing domain
Similarity search - Domain/homology
CHOLESTEROL HEMISUCCINATE / Protein dispatched
Similarity search - Component
Biological speciesDrosophila melanogaster (fruit fly)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.16 Å
AuthorsKorkhov, V.M. / Cannac, F.
Funding support Switzerland, 1items
OrganizationGrant numberCountry
Swiss National Science Foundation150665 & 176992 Switzerland
CitationJournal: Sci Adv / Year: 2020
Title: Cryo-EM structure of the Hedgehog release protein Dispatched.
Authors: Fabien Cannac / Chao Qi / Julia Falschlunger / George Hausmann / Konrad Basler / Volodymyr M Korkhov /
Abstract: The Hedgehog (Hh) signaling pathway controls embryonic development and adult tissue homeostasis in multicellular organisms. In , the pathway is primed by secretion of a dually lipid-modified ...The Hedgehog (Hh) signaling pathway controls embryonic development and adult tissue homeostasis in multicellular organisms. In , the pathway is primed by secretion of a dually lipid-modified morphogen, Hh, a process dependent on a membrane-integral protein Dispatched. Although Dispatched is a critical component of the pathway, the structural basis of its activity has, so far, not been described. Here, we describe a cryo-electron microscopy structure of the Dispatched at 3.2-Å resolution. The ectodomains of Dispatched adopt an open conformation suggestive of a receptor-chaperone role. A three-dimensional reconstruction of Dispatched bound to Hh confirms the ability of Dispatched to bind Hh but using a unique mode distinct from those previously observed in structures of Hh complexes. The structure may represent the state of the complex that precedes shedding of Hh from the surface of the morphogen-releasing cell.
History
DepositionNov 4, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 3, 2020Provider: repository / Type: Initial release
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Revision 1.1Jun 17, 2020Group: Database references / Category: citation / citation_author
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Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_validate_chiral / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _database_PDB_caveat.text / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_seq_id / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Apr 9, 2025Group: Data collection / Database references / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / em_admin / pdbx_entry_details / pdbx_modification_feature
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Revision 1.1Apr 9, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / EM metadata
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Revision 2.2Oct 1, 2025Group: Advisory / Data collection ...Advisory / Data collection / Derived calculations / Structure summary
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Revision 1.2Oct 1, 2025Data content type: EM metadata / Data content type: EM metadata / Group: Experimental summary / Data content type: EM metadata / Category: em_admin / Data content type: EM metadata / Item: _em_admin.last_update

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Structure visualization

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Assembly

Deposited unit
A: Protein dispatched
hetero molecules


Theoretical massNumber of molelcules
Total (without water)144,17612
Polymers139,1501
Non-polymers5,02611
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area810 Å2
ΔGint10 kcal/mol
Surface area40060 Å2
MethodPISA

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Components

#1: Protein Protein dispatched


Mass: 139149.875 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Drosophila melanogaster Dispatched, tagged with a C-terminal 3C-protease cleavage site, YFP and twin-strep tag.
Source: (gene. exp.) Drosophila melanogaster (fruit fly) / Gene: disp, CG2019 / Cell line (production host): HEK293F / Production host: Homo sapiens (human) / References: UniProt: Q9VNJ5
#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-Glycam 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
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#3: Chemical
ChemComp-Y01 / CHOLESTEROL HEMISUCCINATE


Mass: 486.726 Da / Num. of mol.: 9 / Source method: obtained synthetically / Formula: C31H50O4
#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: isolated from a genetically manipulated source
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
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: Drosophila melanogaster protein Dispatched (disp) / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.139 MDa / Experimental value: NO
Source (natural)Organism: Drosophila melanogaster (fruit fly)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
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: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 800 nm
Image recordingElectron dose: 50 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of real images: 9216

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Processing

EM software
IDNameVersionCategory
11RELION3final Euler assignment
12RELION3classification
13RELION33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 3.16 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 286136 / Symmetry type: POINT

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