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- EMDB-28378: Structure of the C3bB proconvertase in complex with lufaxin and f... -

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Basic information

Entry
Database: EMDB / ID: EMD-28378
TitleStructure of the C3bB proconvertase in complex with lufaxin and factor Xa
Map data
Sample
  • Complex: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
    • Protein or peptide: Complement C3 beta chain
    • Protein or peptide: Complement C3b alpha' chain
    • Protein or peptide: Complement factor B
    • Protein or peptide: Factor X light chain
    • Protein or peptide: Activated factor Xa heavy chain
  • Protein or peptide: Lufaxin
  • Ligand: MAGNESIUM ION
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
KeywordsComplement / Alternative pathway / inhibitor / sand fly / IMMUNE SYSTEM
Function / homology
Function and homology information


alternative-complement-pathway C3/C5 convertase / C5L2 anaphylatoxin chemotactic receptor binding / oviduct epithelium development / regulation of triglyceride biosynthetic process / complement binding / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / complement-mediated synapse pruning / Alternative complement activation ...alternative-complement-pathway C3/C5 convertase / C5L2 anaphylatoxin chemotactic receptor binding / oviduct epithelium development / regulation of triglyceride biosynthetic process / complement binding / positive regulation of activation of membrane attack complex / vertebrate eye-specific patterning / positive regulation of apoptotic cell clearance / complement-mediated synapse pruning / Alternative complement activation / coagulation factor Xa / Activation of C3 and C5 / positive regulation of phagocytosis, engulfment / positive regulation of lipid storage / positive regulation of G protein-coupled receptor signaling pathway / positive regulation of type IIa hypersensitivity / complement receptor mediated signaling pathway / Defective factor IX causes thrombophilia / Defective cofactor function of FVIIIa variant / Defective F9 variant does not activate FX / complement-dependent cytotoxicity / positive regulation of D-glucose transmembrane transport / complement activation / complement activation, alternative pathway / Extrinsic Pathway of Fibrin Clot Formation / endopeptidase inhibitor activity / neuron remodeling / amyloid-beta clearance / B cell activation / positive regulation of vascular endothelial growth factor production / complement activation, classical pathway / positive regulation of TOR signaling / Transport of gamma-carboxylated protein precursors from the endoplasmic reticulum to the Golgi apparatus / Gamma-carboxylation of protein precursors / Common Pathway of Fibrin Clot Formation / Removal of aminoterminal propeptides from gamma-carboxylated proteins / Purinergic signaling in leishmaniasis infection / Intrinsic Pathway of Fibrin Clot Formation / Peptide ligand-binding receptors / Regulation of Complement cascade / Post-translational protein phosphorylation / response to bacterium / fatty acid metabolic process / phospholipid binding / positive regulation of receptor-mediated endocytosis / Golgi lumen / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / positive regulation of protein phosphorylation / positive regulation of angiogenesis / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / blood coagulation / azurophil granule lumen / toxin activity / secretory granule lumen / G alpha (i) signalling events / blood microparticle / immune response / positive regulation of cell migration / G protein-coupled receptor signaling pathway / receptor ligand activity / endoplasmic reticulum lumen / inflammatory response / signaling receptor binding / external side of plasma membrane / serine-type endopeptidase activity / calcium ion binding / Neutrophil degranulation / cell surface / signal transduction / protein-containing complex / proteolysis / extracellular space / extracellular exosome / extracellular region / plasma membrane
Similarity search - Function
Complement factor B / Complement B/C2 / Complement C3-like, NTR domain / : / : / Complement component 3, CUB domain, second segment / Complement component 3, CUB domain, first segment / Alpha-2-macroglobulin, conserved site / Alpha-2-macroglobulin family thiolester region signature. / Complement C3/4/5, macroglobulin domain MG1 ...Complement factor B / Complement B/C2 / Complement C3-like, NTR domain / : / : / Complement component 3, CUB domain, second segment / Complement component 3, CUB domain, first segment / Alpha-2-macroglobulin, conserved site / Alpha-2-macroglobulin family thiolester region signature. / Complement C3/4/5, macroglobulin domain MG1 / Macroglobulin domain MG1 / Anaphylatoxin, complement system domain / : / Anaphylatoxin domain signature. / Alpha-macro-globulin thiol-ester bond-forming region / Anaphylatoxin, complement system / Anaphylatoxin/fibulin / Anaphylotoxin-like domain / Anaphylatoxin domain profile. / Anaphylatoxin homologous domain / Netrin C-terminal Domain / Netrin module, non-TIMP type / UNC-6/NTR/C345C module / Macroglobulin domain MG4 / Macroglobulin domain MG4 / Alpha-macroglobulin, receptor-binding / Alpha-macroglobulin, receptor-binding domain superfamily / Macroglobulin domain MG3 / : / A-macroglobulin receptor binding domain / Macroglobulin domain MG3 / A-macroglobulin receptor / Netrin domain / NTR domain profile. / Alpha-2-macroglobulin / Macroglobulin domain / Tissue inhibitor of metalloproteinases-like, OB-fold / Alpha-2-macroglobulin, bait region domain / Alpha-macroglobulin-like, TED domain / Alpha-2-macroglobulin family / MG2 domain / A-macroglobulin TED domain / Alpha-2-macroglobulin bait region domain / Alpha-2-Macroglobulin / Alpha-2-macroglobulin family / Sushi repeat (SCR repeat) / Domain abundant in complement control proteins; SUSHI repeat; short complement-like repeat (SCR) / Peptidase S1A, coagulation factor VII/IX/X/C/Z / : / Coagulation factor-like, Gla domain superfamily / von Willebrand factor type A domain / Sushi/SCR/CCP domain / Sushi/CCP/SCR domain profile. / Sushi/SCR/CCP superfamily / Terpenoid cyclases/protein prenyltransferase alpha-alpha toroid / Coagulation Factor Xa inhibitory site / EGF-like domain / EGF-type aspartate/asparagine hydroxylation site / EGF-like calcium-binding, conserved site / Calcium-binding EGF-like domain signature. / Aspartic acid and asparagine hydroxylation site. / VWFA domain profile. / von Willebrand factor (vWF) type A domain / EGF-like calcium-binding domain / Calcium-binding EGF-like domain / Vitamin K-dependent carboxylation/gamma-carboxyglutamic (GLA) domain / Gamma-carboxyglutamic acid-rich (GLA) domain / Gamma-carboxyglutamic acid-rich (GLA) domain superfamily / Vitamin K-dependent carboxylation domain. / Gla domain profile. / Domain containing Gla (gamma-carboxyglutamate) residues. / von Willebrand factor, type A / Epidermal growth factor-like domain. / EGF-like domain profile. / von Willebrand factor A-like domain superfamily / EGF-like domain signature 1. / EGF-like domain signature 2. / EGF-like domain / Serine proteases, trypsin family, histidine active site / Serine proteases, trypsin family, serine active site / Serine proteases, trypsin family, histidine active site. / Peptidase S1A, chymotrypsin family / Serine proteases, trypsin family, serine active site. / Serine proteases, trypsin domain profile. / Trypsin-like serine protease / Serine proteases, trypsin domain / Trypsin / Immunoglobulin-like fold / Peptidase S1, PA clan, chymotrypsin-like fold / Peptidase S1, PA clan
Similarity search - Domain/homology
Coagulation factor X / Complement factor B / Complement C3 / Lufaxin
Similarity search - Component
Biological speciesHomo sapiens (human) / Lutzomyia longipalpis (insect)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.53 Å
AuthorsAndersen JF / Lei H
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID) United States
CitationJournal: Blood / Year: 2023
Title: A bispecific inhibitor of complement and coagulation blocks activation in complementopathy models via a novel mechanism.
Authors: John F Andersen / Haotian Lei / Ethan C Strayer / Tapan Kanai / Van Pham / Xiang-Zuo Pan / Patricia Hessab Alvarenga / Gloria F Gerber / Oluwatoyin A Asojo / Ivo M B Francischetti / Robert A ...Authors: John F Andersen / Haotian Lei / Ethan C Strayer / Tapan Kanai / Van Pham / Xiang-Zuo Pan / Patricia Hessab Alvarenga / Gloria F Gerber / Oluwatoyin A Asojo / Ivo M B Francischetti / Robert A Brodsky / Jesus G Valenzuela / José M C Ribeiro /
Abstract: Inhibitors of complement and coagulation are present in the saliva of a variety of blood-feeding arthropods that transmit parasitic and viral pathogens. Here, we describe the structure and mechanism ...Inhibitors of complement and coagulation are present in the saliva of a variety of blood-feeding arthropods that transmit parasitic and viral pathogens. Here, we describe the structure and mechanism of action of the sand fly salivary protein lufaxin, which inhibits the formation of the central alternative C3 convertase (C3bBb) and inhibits coagulation factor Xa (fXa). Surface plasmon resonance experiments show that lufaxin stabilizes the binding of serine protease factor B (FB) to C3b but does not detectably bind either C3b or FB alone. The crystal structure of the inhibitor reveals a novel all β-sheet fold containing 2 domains. A structure of the lufaxin-C3bB complex obtained via cryo-electron microscopy (EM) shows that lufaxin binds via its N-terminal domain at an interface containing elements of both C3b and FB. By occupying this spot, the inhibitor locks FB into a closed conformation in which proteolytic activation of FB by FD cannot occur. C3bB-bound lufaxin binds fXa at a separate site in its C-terminal domain. In the cryo-EM structure of a C3bB-lufaxin-fXa complex, the inhibitor binds to both targets simultaneously, and lufaxin inhibits fXa through substrate-like binding of a C-terminal peptide at the active site as well as other interactions in this region. Lufaxin inhibits complement activation in ex vivo models of atypical hemolytic uremic syndrome (aHUS) and paroxysmal nocturnal hemoglobinuria (PNH) as well as thrombin generation in plasma, providing a rationale for the development of a bispecific inhibitor to treat complement-related diseases in which thrombosis is a prominent manifestation.
History
DepositionOct 3, 2022-
Header (metadata) releaseAug 30, 2023-
Map releaseAug 30, 2023-
UpdateOct 30, 2024-
Current statusOct 30, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_28378.png

Downloads & links

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Map

FileDownload / File: emd_28378.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.92 Å/pix.
x 300 pix.
= 276. Å		0.92 Å/pix.
x 300 pix.
= 276. Å		0.92 Å/pix.
x 300 pix.
= 276. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.92 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.00963
Minimum - Maximum-0.03867553 - 0.078063436
Average (Standard dev.)0.000025522824 (±0.0023968962)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 276.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: half map 1

Fileemd_28378_half_map_1.map
Annotationhalf map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: half map 2

Fileemd_28378_half_map_2.map
Annotationhalf map 2
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : The C3 proconvertase from the alternative pathway of complement i...

EntireName: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
Components
  • Complex: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
    • Protein or peptide: Complement C3 beta chain
    • Protein or peptide: Complement C3b alpha' chain
    • Protein or peptide: Complement factor B
    • Protein or peptide: Factor X light chain
    • Protein or peptide: Activated factor Xa heavy chain
  • Protein or peptide: Lufaxin
  • Ligand: MAGNESIUM ION
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose

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Supramolecule #1: The C3 proconvertase from the alternative pathway of complement i...

SupramoleculeName: The C3 proconvertase from the alternative pathway of complement in complex with lufaxin, a complement/coagulation inhibitor and coagulation factor Xa
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#3, #5-#6
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 348.3 KDa

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Macromolecule #1: Complement C3 beta chain

MacromoleculeName: Complement C3 beta chain / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 71.39332 KDa
SequenceString: SPMYSIITPN ILRLESEETM VLEAHDAQGD VPVTVTVHDF PGKKLVLSSE KTVLTPATNH MGNVTFTIPA NREFKSEKGR NKFVTVQAT FGTQVVEKVV LVSLQSGYLF IQTDKTIYTP GSTVLYRIFT VNHKLLPVGR TVMVNIENPE GIPVKQDSLS S QNQLGVLP ...String:
SPMYSIITPN ILRLESEETM VLEAHDAQGD VPVTVTVHDF PGKKLVLSSE KTVLTPATNH MGNVTFTIPA NREFKSEKGR NKFVTVQAT FGTQVVEKVV LVSLQSGYLF IQTDKTIYTP GSTVLYRIFT VNHKLLPVGR TVMVNIENPE GIPVKQDSLS S QNQLGVLP LSWDIPELVN MGQWKIRAYY ENSPQQVFST EFEVKEYVLP SFEVIVEPTE KFYYIYNEKG LEVTITARFL YG KKVEGTA FVIFGIQDGE QRISLPESLK RIPIEDGSGE VVLSRKVLLD GVQNPRAEDL VGKSLYVSAT VILHSGSDMV QAE RSGIPI VTSPYQIHFT KTPKYFKPGM PFDLMVFVTN PDGSPAYRVP VAVQGEDTVQ SLTQGDGVAK LSINTHPSQK PLSI TVRTK KQELSEAEQA TRTMQALPYS TVGNSNNYLH LSVLRTELRP GETLNVNFLL RMDRAHEAKI RYYTYLIMNK GRLLK AGRQ VREPGQDLVV LPLSITTDFI PSFRLVAYYT LIGASGQREV VADSVWVDVK DSCVGSLVVK SGQSEDRQPV PGQQMT LKI EGDHGARVVL VAVDKGVFVL NKKNKLTQSK IWDVVEKADI GCTPGSGKDY AGVFSDAGLT FTSSSGQQTA QRAELQC PQ PAA

UniProtKB: Complement C3

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Macromolecule #2: Complement C3b alpha' chain

MacromoleculeName: Complement C3b alpha' chain / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 104.073164 KDa
SequenceString: SNLDEDIIAE ENIVSRSEFP ESWLWNVEDL KEPPKNGIST KLMNIFLKDS ITTWEILAVS MSDKKGICVA DPFEVTVMQD FFIDLRLPY SVVRNEQVEI RAVLYNYRQN QELKVRVELL HNPAFCSLAT TKRRHQQTVT IPPKSSLSVP YVIVPLKTGL Q EVEVKAAV ...String:
SNLDEDIIAE ENIVSRSEFP ESWLWNVEDL KEPPKNGIST KLMNIFLKDS ITTWEILAVS MSDKKGICVA DPFEVTVMQD FFIDLRLPY SVVRNEQVEI RAVLYNYRQN QELKVRVELL HNPAFCSLAT TKRRHQQTVT IPPKSSLSVP YVIVPLKTGL Q EVEVKAAV YHHFISDGVR KSLKVVPEGI RMNKTVAVRT LDPERLGREG VQKEDIPPAD LSDQVPDTES ETRILLQGTP VA QMTEDAV DAERLKHLIV TPSGCGEQNM IGMTPTVIAV HYLDETEQWE KFGLEKRQGA LELIKKGYTQ QLAFRQPSSA FAA FVKRAP STWLTAYVVK VFSLAVNLIA IDSQVLCGAV KWLILEKQKP DGVFQEDAPV IHQEMIGGLR NNNEKDMALT AFVL ISLQE AKDICEEQVN SLPGSITKAG DFLEANYMNL QRSYTVAIAG YALAQMGRLK GPLLNKFLTT AKDKNRWEDP GKQLY NVEA TSYALLALLQ LKDFDFVPPV VRWLNEQRYY GGGYGSTQAT FMVFQALAQY QKDAPDHQEL NLDVSLQLPS RSSKIT HRI HWESASLLRS EETKENEGFT VTAEGKGQGT LSVVTMYHAK AKDQLTCNKF DLKVTIKPAP ETEKRPQDAK NTMILEI CT RYRGDQDATM SILDISMMTG FAPDTDDLKQ LANGVDRYIS KYELDKAFSD RNTLIIYLDK VSHSEDDCLA FKVHQYFN V ELIQPGAVKV YAYYNLEESC TRFYHPEKED GKLNKLCRDE LCRCAEENCF IQKSDDKVTL EERLDKACEP GVDYVYKTR LVKVQLSNDF DEYIMAIEQT IKSGSDEVQV GQQRTFISPI KCREALKLEE KKHYLMWGLS SDFWGEKPNL SYIIGKDTWV EHWPEEDEC QDEENQKQCQ DLGAFTESMV VFGCPN

UniProtKB: Complement C3

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Macromolecule #3: Complement factor B

MacromoleculeName: Complement factor B / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO / EC number: alternative-complement-pathway C3/C5 convertase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 85.510617 KDa
SequenceString: GSNLSPQLCL MPFILGLLSG GVTTTPWSLA RPQGSCSLEG VEIKGGSFRL LQEGQALEYV CPSGFYPYPV QTRTCRSTGS WSTLKTQDQ KTVRKAECRA IHCPRPHDFE NGEYWPRSPY YNVSDEISFH CYDGYTLRGS ANRTCQVNGR WSGQTAICDN G AGYCSNPG ...String:
GSNLSPQLCL MPFILGLLSG GVTTTPWSLA RPQGSCSLEG VEIKGGSFRL LQEGQALEYV CPSGFYPYPV QTRTCRSTGS WSTLKTQDQ KTVRKAECRA IHCPRPHDFE NGEYWPRSPY YNVSDEISFH CYDGYTLRGS ANRTCQVNGR WSGQTAICDN G AGYCSNPG IPIGTRKVGS QYRLEDSVTY HCSRGLTLRG SQRRTCQEGG SWSGTEPSCQ DSFMYDTPQE VAEAFLSSLT ET IEGVDAE DGHGPGEQQK RKIVLDPSGS MNIYLVLDGS DSIGASNFTG AKKCLVNLIE KVASYGVKPR YGLVTYATYP KIW VKVSEA DSSNADWVTK QLNEINYEDH KLKSGTNTKK ALQAVYSMMS WPDDVPPEGW NRTRHVIILM TDGLHNMGGD PITV IDEIR DLLYIGKDRK NPREDYLDVY VFGVGPLVNQ VNINALASKK DNEQHVFKVK DMENLEDVFY QMIDESQSLS LCGMV WEHR KGTDYHKQPW QAKISVIRPS KGHESCMGAV VSEYFVLTAA HCFTVDDKEH SIKVSVGGEK RDLEIEVVLF HPNYNI NGK KEAGIPEFYD YDVALIKLKN KLKYGQTIRP ICLPCTEGTT RALRLPPTTT CQQQKEELLP AQDIKALFVS EEEKKLT RK EVYIKNGDKK GSCERDAQYA PGYDKVKDIS EVVTPRFLCT GGVSPYADPN TCRGDSGGPL IVHKRSRFIQ VGVISWGV V DVCKNQKRQK QVPAHARDFH INLFQVLPWL KEKLQDEDLG FL

UniProtKB: Complement factor B

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Macromolecule #4: Lufaxin

MacromoleculeName: Lufaxin / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Lutzomyia longipalpis (insect)
Molecular weightTheoretical: 33.354586 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: DGDEYFIGKY KEKDETLFFA SYGLKRDPCQ IVLGYKCSNN QTHFVLNFKT NKKSCISAIK LTSYPKINQN SDLTRNLYCQ TGGIGTDNC KLVFKKRKRQ IAANIEIYGI PAKKCSFKDR YIGADPLHVD SYGLSYQFDQ EHGWNLERNN IFKDTRFSTE V FYHKNGLF ...String:
DGDEYFIGKY KEKDETLFFA SYGLKRDPCQ IVLGYKCSNN QTHFVLNFKT NKKSCISAIK LTSYPKINQN SDLTRNLYCQ TGGIGTDNC KLVFKKRKRQ IAANIEIYGI PAKKCSFKDR YIGADPLHVD SYGLSYQFDQ EHGWNLERNN IFKDTRFSTE V FYHKNGLF NTQITYLAEE DSFSEAREIT AKDIKKKFSI ILPNEEYKRI SFLDVYWFQE TMRKKPKYPY IHYNGECSNE NK TCELVFD TDELMTYALV KVFTNPESDG SRLKEEDLGR GHHHHHH

UniProtKB: Lufaxin

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Macromolecule #5: Factor X light chain

MacromoleculeName: Factor X light chain / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 15.210793 KDa
SequenceString:
EEMKKGHLER ECMEETCSYE EAREVFEDSD KTNEFWNKYK DGDQCETSPC QNQGKCKDGL GEYTCTCLEG FEGKNCELFT RKLCSLDNG DCDQFCHEEQ NSVVCSCARG YTLADNGKAC IPTGPYPCGK QTLER

UniProtKB: Coagulation factor X

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Macromolecule #6: Activated factor Xa heavy chain

MacromoleculeName: Activated factor Xa heavy chain / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 28.550596 KDa
SequenceString: IVGGQECKDG ECPWQALLIN EENEGFCGGT ILSEFYILTA AHCLYQAKRF KVRVGDRNTE QEEGGEAVHE VEVVIKHNRF TKETYDFDI AVLRLKTPIT FRMNVAPACL PERDWAESTL MTQKTGIVSG FGRTHEKGRQ STRLKMLEVP YVDRNSCKLS S SFIITQNM ...String:
IVGGQECKDG ECPWQALLIN EENEGFCGGT ILSEFYILTA AHCLYQAKRF KVRVGDRNTE QEEGGEAVHE VEVVIKHNRF TKETYDFDI AVLRLKTPIT FRMNVAPACL PERDWAESTL MTQKTGIVSG FGRTHEKGRQ STRLKMLEVP YVDRNSCKLS S SFIITQNM FCAGYDTKQE DACQGDSGGP HVTRFKDTYF VTGIVSWGEG CARKGKYGIY TKVTAFLKWI DRSMKTRGLP KA KSHAPEV ITSSPLK

UniProtKB: Coagulation factor X

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Macromolecule #8: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 8 / Number of copies: 1 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Macromolecule #9: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 9 / 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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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1.5 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
10.0 mMC8H18N2O4SHEPES
150.0 mMNaClSodium Chloride
5.0 mMMgCl2Magnesium Chloride
GridModel: C-flat-1.2/1.3 / Material: GOLD / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE
DetailsThe sample was monodisperse

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Electron microscopy

MicroscopeTFS GLACIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 58.31 e/Å2
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.2 µm / Nominal defocus min: 0.3 µm / Nominal magnification: 45000

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Image processing

Particle selectionNumber selected: 713201
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.53 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 4.0.0) / Number images used: 248281
Initial angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: RELION (ver. 4.0.0)
Final angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: RELION (ver. 4.0.0)

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