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- PDB-7yuy: Structure of a mutated membrane-bound glycosyltransferase -

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Basic information

Entry
Database: PDB / ID: 7yuy
TitleStructure of a mutated membrane-bound glycosyltransferase
Components1,3-beta-glucan synthase component FKS1
KeywordsTRANSFERASE / membrane protein / glycosyltransferase
Function / homology
Function and homology information


fungal-type cell wall polysaccharide biosynthetic process / 1,3-beta-glucan synthase / 1,3-beta-D-glucan synthase activity / (1->3)-beta-D-glucan biosynthetic process / 1,3-beta-D-glucan synthase complex / fungal-type cell wall biogenesis / cellular bud / ascospore wall assembly / cellular bud tip / actin cortical patch ...fungal-type cell wall polysaccharide biosynthetic process / 1,3-beta-glucan synthase / 1,3-beta-D-glucan synthase activity / (1->3)-beta-D-glucan biosynthetic process / 1,3-beta-D-glucan synthase complex / fungal-type cell wall biogenesis / cellular bud / ascospore wall assembly / cellular bud tip / actin cortical patch / fungal-type cell wall / cellular bud neck / regulation of cell size / positive regulation of endocytosis / cell periphery / mitochondrion / plasma membrane
Similarity search - Function
Glycosyl transferase, family 48 / 1,3-beta-glucan synthase subunit FKS1-like, domain-1 / 1,3-beta-glucan synthase component / 1,3-beta-glucan synthase subunit FKS1, domain-1 / 1,3-beta-glucan synthase subunit FKS1
Similarity search - Domain/homology
TETRADECANE / DECANE / DODECANE / nonane / HEPTANE / Chem-XKP / 1,3-beta-glucan synthase component FKS1
Similarity search - Component
Biological speciesSaccharomyces cerevisiae (brewer's yeast)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 Å
AuthorsHu, X.L. / Yang, P. / Zhang, M. / Liu, X.T. / Yu, H.J.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Nature / Year: 2023
Title: Structural and mechanistic insights into fungal β-1,3-glucan synthase FKS1.
Authors: Xinlin Hu / Ping Yang / Changdong Chai / Jia Liu / Huanhuan Sun / Yanan Wu / Mingjie Zhang / Min Zhang / Xiaotian Liu / Hongjun Yu /
Abstract: The membrane-integrated synthase FKS is involved in the biosynthesis of β-1,3-glucan, the core component of the fungal cell wall. FKS is the target of widely prescribed antifungal drugs, including ...The membrane-integrated synthase FKS is involved in the biosynthesis of β-1,3-glucan, the core component of the fungal cell wall. FKS is the target of widely prescribed antifungal drugs, including echinocandin and ibrexafungerp. Unfortunately, the mechanism of action of FKS remains enigmatic and this has hampered development of more effective medicines targeting the enzyme. Here we present the cryo-electron microscopy structures of Saccharomyces cerevisiae FKS1 and the echinocandin-resistant mutant FKS1(S643P). These structures reveal the active site of the enzyme at the membrane-cytoplasm interface and a glucan translocation path spanning the membrane bilayer. Multiple bound lipids and notable membrane distortions are observed in the FKS1 structures, suggesting active FKS1-membrane interactions. Echinocandin-resistant mutations are clustered at a region near TM5-6 and TM8 of FKS1. The structure of FKS1(S643P) reveals altered lipid arrangements in this region, suggesting a drug-resistant mechanism of the mutant enzyme. The structures, the catalytic mechanism and the molecular insights into drug-resistant mutations of FKS1 revealed in this study advance the mechanistic understanding of fungal β-1,3-glucan biosynthesis and establish a foundation for developing new antifungal drugs by targeting FKS.
History
DepositionAug 18, 2022Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Mar 29, 2023Provider: repository / Type: Initial release
Revision 1.1Apr 5, 2023Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2Apr 19, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.3Oct 16, 2024Group: Data collection / Structure summary
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
F: 1,3-beta-glucan synthase component FKS1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)219,83528
Polymers215,0861
Non-polymers4,74927
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: gel filtration
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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Protein , 1 types, 1 molecules F

#1: Protein 1,3-beta-glucan synthase component FKS1 / 1 / 3-beta-D-glucan-UDP glucosyltransferase / Calcineurin dependent protein 1 / Calcofluor white ...1 / 3-beta-D-glucan-UDP glucosyltransferase / Calcineurin dependent protein 1 / Calcofluor white hypersensitivity protein 53 / Echinocandin target gene protein 1 / FK506 sensitivity protein 1 / Glucan synthase of cerevisiae protein 1 / Papulacandin B resistance protein 1


Mass: 215086.203 Da / Num. of mol.: 1 / Mutation: S643P
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Saccharomyces cerevisiae (brewer's yeast)
Strain: ATCC 204508 / S288c
Gene: FKS1, CND1, CWH53, ETG1, GLS1, GSC1, PBR1, YLR342W, L8300.6
Production host: Saccharomyces cerevisiae (brewer's yeast) / References: UniProt: P38631, 1,3-beta-glucan synthase

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Sugars , 2 types, 2 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
#3: Polysaccharide beta-D-glucopyranose-(1-3)-beta-D-glucopyranose-(1-3)-beta-D-glucopyranose-(1-3)-beta-D-glucopyranose


Type: oligosaccharide / Mass: 666.578 Da / Num. of mol.: 1 / Source method: obtained synthetically
DescriptorTypeProgram
DGlcpb1-3DGlcpb1-3DGlcpb1-3DGlcpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,4,3/[a2122h-1b_1-5]/1-1-1-1/a3-b1_b3-c1_c3-d1WURCSPDB2Glycan 1.1.0
[][b-D-Glcp]{[(3+1)][b-D-Glcp]{[(3+1)][b-D-Glcp]{[(3+1)][b-D-Glcp]{}}}}LINUCSPDB-CARE

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Non-polymers , 6 types, 25 molecules

#4: Chemical
ChemComp-DD9 / nonane


Mass: 128.255 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C9H20
#5: Chemical
ChemComp-D10 / DECANE


Mass: 142.282 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C10H22
#6: Chemical ChemComp-C14 / TETRADECANE


Mass: 198.388 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C14H30
#7: Chemical
ChemComp-HP6 / HEPTANE


Mass: 100.202 Da / Num. of mol.: 7 / Source method: obtained synthetically / Formula: C7H16
#8: Chemical ChemComp-D12 / DODECANE


Mass: 170.335 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C12H26
#9: Chemical ChemComp-XKP / (11R,14S)-17-amino-14-hydroxy-8,14-dioxo-9,13,15-trioxa-14lambda~5~-phosphaheptadecan-11-yl decanoate


Mass: 495.587 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C23H46NO8P

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Details

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: membrane-bound glycosyltransferase / Type: COMPLEX / Entity ID: #1 / Source: NATURAL
Molecular weightValue: 0.215 MDa / Experimental value: NO
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Buffer solutionpH: 7.4
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: 3000 nm / Nominal defocus min: 1100 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

SoftwareName: PHENIX / Version: 1.19.1_4122: / Classification: refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 176682 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00512605
ELECTRON MICROSCOPYf_angle_d0.72717017
ELECTRON MICROSCOPYf_dihedral_angle_d5.0071809
ELECTRON MICROSCOPYf_chiral_restr0.0471872
ELECTRON MICROSCOPYf_plane_restr0.0042120

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