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- EMDB-36861: S. cerevisiae Chs1 in complex with UDP and GlcNAc -

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Basic information

Entry
Database: EMDB / ID: EMD-36861
TitleS. cerevisiae Chs1 in complex with UDP and GlcNAc
Map data
Sample
  • Complex: S. cerevisiae Chs1 in complex with UDP and GlcNAc
    • Protein or peptide: Chitin synthase 1
  • Ligand: MAGNESIUM ION
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: URIDINE-5'-DIPHOSPHATE
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
KeywordsANTIFUNGAL PROTEIN-INHIBITOR complex
Function / homology
Function and homology information


chitosome / : / chitin synthase / chitin synthase activity / septum digestion after cytokinesis / cell septum / cell periphery / cell wall organization / plasma membrane
Similarity search - Function
Chitin synthase N-terminal / Chitin synthase N-terminal / Fungal chitin synthase / Chitin synthase / Chitin synthase / Nucleotide-diphospho-sugar transferases
Similarity search - Domain/homology
Biological speciesSaccharomyces cerevisiae (brewer's yeast)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.06 Å
AuthorsBai L / Chen D
Funding support China, 1 items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)32171212 China
CitationJournal: Nat Commun / Year: 2023
Title: Structure, catalysis, chitin transport, and selective inhibition of chitin synthase.
Authors: Dan-Dan Chen / Zhao-Bin Wang / Le-Xuan Wang / Peng Zhao / Cai-Hong Yun / Lin Bai /
Abstract: Chitin is one of the most abundant natural biopolymers and serves as a critical structural component of extracellular matrices, including fungal cell walls and insect exoskeletons. As a linear ...Chitin is one of the most abundant natural biopolymers and serves as a critical structural component of extracellular matrices, including fungal cell walls and insect exoskeletons. As a linear polymer of β-(1,4)-linked N-acetylglucosamine, chitin is synthesized by chitin synthases, which are recognized as targets for antifungal and anti-insect drugs. In this study, we determine seven different cryo-electron microscopy structures of a Saccharomyces cerevisiae chitin synthase in the absence and presence of glycosyl donor, acceptor, product, or peptidyl nucleoside inhibitors. Combined with functional analyses, these structures show how the donor and acceptor substrates bind in the active site, how substrate hydrolysis drives self-priming, how a chitin-conducting transmembrane channel opens, and how peptidyl nucleoside inhibitors inhibit chitin synthase. Our work provides a structural basis for understanding the function and inhibition of chitin synthase.
History
DepositionJul 17, 2023-
Header (metadata) releaseSep 6, 2023-
Map releaseSep 6, 2023-
UpdateMay 8, 2024-
Current statusMay 8, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_36861.png

Downloads & links

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Map

FileDownload / File: emd_36861.map.gz / Format: CCP4 / Size: 40.6 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 220 pix.
= 233.2 Å		1.06 Å/pix.
x 220 pix.
= 233.2 Å		1.06 Å/pix.
x 220 pix.
= 233.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.06 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.44
Minimum - Maximum-3.6434727 - 3.5419002
Average (Standard dev.)0.003594695 (±0.09068679)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions220220220
Spacing220220220
CellA=B=C: 233.19998 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_36861_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_36861_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
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Histogram

Histogram (log scale)

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Sample components

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Entire : S. cerevisiae Chs1 in complex with UDP and GlcNAc

EntireName: S. cerevisiae Chs1 in complex with UDP and GlcNAc
Components
  • Complex: S. cerevisiae Chs1 in complex with UDP and GlcNAc
    • Protein or peptide: Chitin synthase 1
  • Ligand: MAGNESIUM ION
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: URIDINE-5'-DIPHOSPHATE
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate

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Supramolecule #1: S. cerevisiae Chs1 in complex with UDP and GlcNAc

SupramoleculeName: S. cerevisiae Chs1 in complex with UDP and GlcNAc / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)

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Macromolecule #1: Chitin synthase 1

MacromoleculeName: Chitin synthase 1 / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO / EC number: chitin synthase
Source (natural)Organism: Saccharomyces cerevisiae (brewer's yeast)
Molecular weightTheoretical: 130.001141 KDa
Recombinant expressionOrganism: Saccharomyces cerevisiae (brewer's yeast)
SequenceString: MSDQNNRSRN EYHSNRKNEP SYELQNAHSG LFHSSNEELT NRNQRYTNQN ASMGSFTPVQ SLQFPEQSQQ TNMLYNGDDG NNNTINDNE RDIYGGFVNH HRQRPPPATA EYNDVFNTNS QQLPSEHQYN NVPSYPLPSI NVIQTTPELI HNGSQTMATP I ERPFFNEN ...String:
MSDQNNRSRN EYHSNRKNEP SYELQNAHSG LFHSSNEELT NRNQRYTNQN ASMGSFTPVQ SLQFPEQSQQ TNMLYNGDDG NNNTINDNE RDIYGGFVNH HRQRPPPATA EYNDVFNTNS QQLPSEHQYN NVPSYPLPSI NVIQTTPELI HNGSQTMATP I ERPFFNEN DYYYNNRNSR TSPSIASSSD GYADQEARPI LEQPNNNMNS GNIPQYHDQP FGYNNGYHGL QAKDYYDDPE GG YIDQRGD DYQINSYLGR NGEMVDPYDY ENSLRHMTPM ERREYLHDDS RPVNDGKEEL DSVKSGYSHR DLGEYDKDDF SRD DEYDDL NTIDKLQFQA NGVPASSSVS SIGSKESDII VSNDNLTANR ALKRSGTEIR KFKLWNGNFV FDSPISKTLL DQYA TTTEN ANTLPNEFKF MRYQAVTCEP NQLAEKNFTV RQLKYLTPRE TELMLVVTMY NEDHILLGRT LKGIMDNVKY MVKKK NSST WGPDAWKKIV VCIISDGRSK INERSLALLS SLGCYQDGFA KDEINEKKVA MHVYEHTTMI NITNISESEV SLECNQ GTV PIQLLFCLKE QNQKKINSHR WAFEGFAELL RPNIVTLLDA GTMPGKDSIY QLWREFRNPN VGGACGEIRT DLGKRFV KL LNPLVASQNF EYKMSNILDK TTESNFGFIT VLPGAFSAYR FEAVRGQPLQ KYFYGEIMEN EGFHFFSSNM YLAEDRIL C FEVVTKKNCN WILKYCRSSY ASTDVPERVP EFILQRRRWL NGSFFASVYS FCHFYRVWSS GHNIGRKLLL TVEFFYLFF NTLISWFSLS SFFLVFRILT VSIALAYHSA FNVLSVIFLW LYGICTLSTF ILSLGNKPKS TEKFYVLTCV IFAVMMIYMI FCSIFMSVK SFQNILKNDT ISFEGLITTE AFRDIVISLG STYCLYLISS IIYLQPWHML TSFIQYILLS PSYINVLNIY A FCNVHDLS WGTKGAMANP LGKINTTEDG TFKMEVLVSS SEIQANYDKY LKVLNDFDPK SESRPTEPSY DEKKTGYYAN VR SLVIIFW VITNFIIVAV VLETGGIADY IAMKSISTDD TLETAKKAEI PLMTSKASIY FNVILWLVAL SALIRFIGCS IYM IVRFFK KVTFR

UniProtKB: Chitin synthase 1

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Macromolecule #2: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 2 / Number of copies: 4 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #3: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 3 / Number of copies: 2 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

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

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Macromolecule #4: URIDINE-5'-DIPHOSPHATE

MacromoleculeName: URIDINE-5'-DIPHOSPHATE / type: ligand / ID: 4 / Number of copies: 2 / Formula: UDP
Molecular weightTheoretical: 404.161 Da
Chemical component information

ChemComp-UDP:
URIDINE-5'-DIPHOSPHATE / UDP*YM

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Macromolecule #5: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(tri...

MacromoleculeName: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
type: ligand / ID: 5 / Number of copies: 2 / Formula: POV
Molecular weightTheoretical: 760.076 Da
Chemical component information

ChemComp-POV:
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / phospholipid*YM

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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

Concentration4 mg/mL
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: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 1.8 µm / Nominal defocus min: 1.2 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.06 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 184449
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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