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- EMDB-24535: Structure of the human eukaryotic translation initiation factor 2... -

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Basic information

Entry
Database: EMDB / ID: EMD-24535
TitleStructure of the human eukaryotic translation initiation factor 2B (eIF2B) in complex with a viral protein NSs
Map data
Sample
  • Complex: Eukaryotic translation initiation factor 2B in complex with SFSV NSs
    • Complex: NSs Protein of Sandfly Fever Sicilian Phlebovirus
      • Protein or peptide: Non-structural protein NS-S
    • Complex: Translation initiation factor eIF-2B subunit
      • Protein or peptide: Translation initiation factor eIF-2B subunit epsilon
      • Protein or peptide: Translation initiation factor eIF-2B subunit beta
      • Protein or peptide: Translation initiation factor eIF-2B subunit delta
      • Protein or peptide: Translation initiation factor eIF-2B subunit alpha
      • Protein or peptide: Translation initiation factor eIF-2B subunit gamma
KeywordsComplex / viral protein / integrated stress response / protein translation / TRANSLATION
Function / homology
Function and homology information


eukaryotic translation initiation factor 2B complex / Recycling of eIF2:GDP / cytoplasmic translational initiation / guanyl-nucleotide exchange factor complex / oligodendrocyte development / astrocyte development / astrocyte differentiation / regulation of translational initiation / positive regulation of translational initiation / response to glucose ...eukaryotic translation initiation factor 2B complex / Recycling of eIF2:GDP / cytoplasmic translational initiation / guanyl-nucleotide exchange factor complex / oligodendrocyte development / astrocyte development / astrocyte differentiation / regulation of translational initiation / positive regulation of translational initiation / response to glucose / ovarian follicle development / translation initiation factor binding / response to endoplasmic reticulum stress / myelination / translation initiation factor activity / guanyl-nucleotide exchange factor activity / hippocampus development / central nervous system development / translational initiation / response to peptide hormone / regulation of translation / T cell receptor signaling pathway / response to heat / positive regulation of apoptotic process / GTP binding / ATP binding / identical protein binding / membrane / nucleus / plasma membrane / cytosol / cytoplasm
Similarity search - Function
Phlebovirus, non structural protein / Rift valley fever virus non structural protein-like / Rift valley fever virus non structural protein (NSs) like / Translation initiation factor eIF-2B subunit alpha, N-terminal / : / : / Translation initiation factor eIF-2B subunit epsilon, N-terminal / Translation initiation factor eIF-2B subunit epsilon, W2 domain / : / : ...Phlebovirus, non structural protein / Rift valley fever virus non structural protein-like / Rift valley fever virus non structural protein (NSs) like / Translation initiation factor eIF-2B subunit alpha, N-terminal / : / : / Translation initiation factor eIF-2B subunit epsilon, N-terminal / Translation initiation factor eIF-2B subunit epsilon, W2 domain / : / : / Initiation factor 2B-related / Initiation factor 2B-like, C-terminal / Initiation factor 2 subunit family / eIF4-gamma/eIF5/eIF2-epsilon / Domain at the C-termini of GCD6, eIF-2B epsilon, eIF-4 gamma and eIF-5 / W2 domain / W2 domain profile. / Nucleotidyl transferase domain / Nucleotidyl transferase / NagB/RpiA transferase-like / Trimeric LpxA-like superfamily / Nucleotide-diphospho-sugar transferases / Armadillo-type fold
Similarity search - Domain/homology
Non-structural protein NS-S / Translation initiation factor eIF2B subunit beta / Translation initiation factor eIF2B subunit epsilon / Translation initiation factor eIF2B subunit alpha / Translation initiation factor eIF2B subunit gamma / Translation initiation factor eIF2B subunit delta
Similarity search - Component
Biological speciesSandfly fever Sicilian virus / Homo sapiens (human) / Sandfly fever sicilian virus
Methodsingle particle reconstruction / cryo EM / Resolution: 2.6 Å
AuthorsWang L / Schoof M
Funding support United States, 1 items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Nat Commun / Year: 2021
Title: Viral evasion of the integrated stress response through antagonism of eIF2-P binding to eIF2B.
Authors: Michael Schoof / Lan Wang / J Zachery Cogan / Rosalie E Lawrence / Morgane Boone / Jennifer Deborah Wuerth / Adam Frost / Peter Walter /
Abstract: Viral infection triggers activation of the integrated stress response (ISR). In response to viral double-stranded RNA (dsRNA), RNA-activated protein kinase (PKR) phosphorylates the translation ...Viral infection triggers activation of the integrated stress response (ISR). In response to viral double-stranded RNA (dsRNA), RNA-activated protein kinase (PKR) phosphorylates the translation initiation factor eIF2, converting it from a translation initiator into a potent translation inhibitor and this restricts the synthesis of viral proteins. Phosphorylated eIF2 (eIF2-P) inhibits translation by binding to eIF2's dedicated, heterodecameric nucleotide exchange factor eIF2B and conformationally inactivating it. We show that the NSs protein of Sandfly Fever Sicilian virus (SFSV) allows the virus to evade the ISR. Mechanistically, NSs tightly binds to eIF2B (K= 30 nM), blocks eIF2-P binding, and rescues eIF2B GEF activity. Cryo-EM structures demonstrate that SFSV NSs and eIF2-P directly compete, with the primary NSs contacts to eIF2Bα mediated by five 'aromatic fingers'. NSs binding preserves eIF2B activity by maintaining eIF2B's conformation in its active A-State.
History
DepositionJul 26, 2021-
Header (metadata) releaseDec 22, 2021-
Map releaseDec 22, 2021-
UpdateJun 5, 2024-
Current statusJun 5, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.25
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.25
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7rlo
  • Surface level: 0.35
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_24535.png

Downloads & links

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Map

FileDownload / File: emd_24535.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 400 pix.
= 334. Å		0.84 Å/pix.
x 400 pix.
= 334. Å		0.84 Å/pix.
x 400 pix.
= 334. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.835 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.25 / Movie #1: 0.25
Minimum - Maximum-1.1171376 - 2.294387
Average (Standard dev.)0.0020072896 (±0.06586617)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions400400400
Spacing400400400
CellA=B=C: 334.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.8350.8350.835
M x/y/z400400400
origin x/y/z0.0000.0000.000
length x/y/z334.000334.000334.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS400400400
D min/max/mean-1.1172.2940.002

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Supplemental data

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Sample components

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Entire : Eukaryotic translation initiation factor 2B in complex with SFSV NSs

EntireName: Eukaryotic translation initiation factor 2B in complex with SFSV NSs
Components
  • Complex: Eukaryotic translation initiation factor 2B in complex with SFSV NSs
    • Complex: NSs Protein of Sandfly Fever Sicilian Phlebovirus
      • Protein or peptide: Non-structural protein NS-S
    • Complex: Translation initiation factor eIF-2B subunit
      • Protein or peptide: Translation initiation factor eIF-2B subunit epsilon
      • Protein or peptide: Translation initiation factor eIF-2B subunit beta
      • Protein or peptide: Translation initiation factor eIF-2B subunit delta
      • Protein or peptide: Translation initiation factor eIF-2B subunit alpha
      • Protein or peptide: Translation initiation factor eIF-2B subunit gamma

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Supramolecule #1: Eukaryotic translation initiation factor 2B in complex with SFSV NSs

SupramoleculeName: Eukaryotic translation initiation factor 2B in complex with SFSV NSs
type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Molecular weightTheoretical: 500 KDa

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Supramolecule #2: NSs Protein of Sandfly Fever Sicilian Phlebovirus

SupramoleculeName: NSs Protein of Sandfly Fever Sicilian Phlebovirus / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #6
Source (natural)Organism: Sandfly fever Sicilian virus

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Supramolecule #3: Translation initiation factor eIF-2B subunit

SupramoleculeName: Translation initiation factor eIF-2B subunit / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #1-#5
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Translation initiation factor eIF-2B subunit epsilon

MacromoleculeName: Translation initiation factor eIF-2B subunit epsilon / type: protein_or_peptide / ID: 1 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 80.466609 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MAAPVVAPPG VVVSRANKRS GAGPGGSGGG GARGAEEEPP PPLQAVLVAD SFDRRFFPIS KDQPRVLLPL ANVALIDYTL EFLTATGVQ ETFVFCCWKA AQIKEHLLKS KWCRPTSLNV VRIITSELYR SLGDVLRDVD AKALVRSDFL LVYGDVISNI N ITRALEEH ...String:
MAAPVVAPPG VVVSRANKRS GAGPGGSGGG GARGAEEEPP PPLQAVLVAD SFDRRFFPIS KDQPRVLLPL ANVALIDYTL EFLTATGVQ ETFVFCCWKA AQIKEHLLKS KWCRPTSLNV VRIITSELYR SLGDVLRDVD AKALVRSDFL LVYGDVISNI N ITRALEEH RLRRKLEKNV SVMTMIFKES SPSHPTRCHE DNVVVAVDST TNRVLHFQKT QGLRRFAFPL SLFQGSSDGV EV RYDLLDC HISICSPQVA QLFTDNFDYQ TRDDFVRGLL VNEEILGNQI HMHVTAKEYG ARVSNLHMYS AVCADVIRRW VYP LTPEAN FTDSTTQSCT HSRHNIYRGP EVSLGHGSIL EENVLLGSGT VIGSNCFITN SVIGPGCHIG DNVVLDQTYL WQGV RVAAG AQIHQSLLCD NAEVKERVTL KPRSVLTSQV VVGPNITLPE GSVISLHPPD AEEDEDDGEF SDDSGADQEK DKVKM KGYN PAEVGAAGKG YLWKAAGMNM EEEEELQQNL WGLKINMEEE SESESEQSMD SEEPDSRGGS PQMDDIKVFQ NEVLGT LQR GKEENISCDN LVLEINSLKY AYNISLKEVM QVLSHVVLEF PLQQMDSPLD SSRYCALLLP LLKAWSPVFR NYIKRAA DH LEALAAIEDF FLEHEALGIS MAKVLMAFYQ LEILAEETIL SWFSQRDTTD KGQQLRKNQQ LQRFIQWLKE AEEESSED D

UniProtKB: Translation initiation factor eIF2B subunit epsilon

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Macromolecule #2: Translation initiation factor eIF-2B subunit beta

MacromoleculeName: Translation initiation factor eIF-2B subunit beta / type: protein_or_peptide / ID: 2 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 39.039547 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MPGSAAKGSE LSERIESFVE TLKRGGGPRS SEEMARETLG LLRQIITDHR WSNAGELMEL IRREGRRMTA AQPSETTVGN MVRRVLKII REEYGRLHGR SDESDQQESL HKLLTSGGLN EDFSFHYAQL QSNIIEAINE LLVELEGTME NIAAQALEHI H SNEVIMTI ...String:
MPGSAAKGSE LSERIESFVE TLKRGGGPRS SEEMARETLG LLRQIITDHR WSNAGELMEL IRREGRRMTA AQPSETTVGN MVRRVLKII REEYGRLHGR SDESDQQESL HKLLTSGGLN EDFSFHYAQL QSNIIEAINE LLVELEGTME NIAAQALEHI H SNEVIMTI GFSRTVEAFL KEAARKRKFH VIVAECAPFC QGHEMAVNLS KAGIETTVMT DAAIFAVMSR VNKVIIGTKT IL ANGALRA VTGTHTLALA AKHHSTPLIV CAPMFKLSPQ FPNEEDSFHK FVAPEEVLPF TEGDILEKVS VHCPVFDYVP PEL ITLFIS NIGGNAPSYI YRLMSELYHP DDHVL

UniProtKB: Translation initiation factor eIF2B subunit beta

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Macromolecule #3: Translation initiation factor eIF-2B subunit delta

MacromoleculeName: Translation initiation factor eIF-2B subunit delta / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 57.640168 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MAAVAVAVRE DSGSGMKAEL PPGPGAVGRE MTKEEKLQLR KEKKQQKKKR KEEKGAEPET GSAVSAAQCQ VGPTRELPES GIQLGTPRE KVPAGRSKAE LRAERRAKQE AERALKQARK GEQGGPPPKA SPSTAGETPS GVKRLPEYPQ VDDLLLRRLV K KPERQQVP ...String:
MAAVAVAVRE DSGSGMKAEL PPGPGAVGRE MTKEEKLQLR KEKKQQKKKR KEEKGAEPET GSAVSAAQCQ VGPTRELPES GIQLGTPRE KVPAGRSKAE LRAERRAKQE AERALKQARK GEQGGPPPKA SPSTAGETPS GVKRLPEYPQ VDDLLLRRLV K KPERQQVP TRKDYGSKVS LFSHLPQYSR QNSLTQFMSI PSSVIHPAMV RLGLQYSQGL VSGSNARCIA LLRALQQVIQ DY TTPPNEE LSRDLVNKLK PYMSFLTQCR PLSASMHNAI KFLNKEITSV GSSKREEEAK SELRAAIDRY VQEKIVLAAQ AIS RFAYQK ISNGDVILVY GCSSLVSRIL QEAWTEGRRF RVVVVDSRPW LEGRHTLRSL VHAGVPASYL LIPAASYVLP EVSK VLLGA HALLANGSVM SRVGTAQLAL VARAHNVPVL VCCETYKFCE RVQTDAFVSN ELDDPDDLQC KRGEHVALAN WQNHA SLRL LNLVYDVTPP ELVDLVITEL GMIPCSSVPV VLRVKSSDQ

UniProtKB: Translation initiation factor eIF2B subunit delta

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Macromolecule #4: Translation initiation factor eIF-2B subunit alpha

MacromoleculeName: Translation initiation factor eIF-2B subunit alpha / type: protein_or_peptide / ID: 4 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 33.754148 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MDDKELIEYF KSQMKEDPDM ASAVAAIRTL LEFLKRDKGE TIQGLRANLT SAIETLCGVD SSVAVSSGGE LFLRFISLAS LEYSDYSKC KKIMIERGEL FLRRISLSRN KIADLCHTFI KDGATILTHA YSRVVLRVLE AAVAAKKRFS VYVTESQPDL S GKKMAKAL ...String:
MDDKELIEYF KSQMKEDPDM ASAVAAIRTL LEFLKRDKGE TIQGLRANLT SAIETLCGVD SSVAVSSGGE LFLRFISLAS LEYSDYSKC KKIMIERGEL FLRRISLSRN KIADLCHTFI KDGATILTHA YSRVVLRVLE AAVAAKKRFS VYVTESQPDL S GKKMAKAL CHLNVPVTVV LDAAVGYIME KADLVIVGAE GVVENGGIIN KIGTNQMAVC AKAQNKPFYV VAESFKFVRL FP LNQQDVP DKFKYKADTL KVAQTGQDLK EEHPWVDYTA PSLITLLFTD LGVLTPSAVS DELIKLYL

UniProtKB: Translation initiation factor eIF2B subunit alpha

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Macromolecule #5: Translation initiation factor eIF-2B subunit gamma

MacromoleculeName: Translation initiation factor eIF-2B subunit gamma / type: protein_or_peptide / ID: 5 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 50.30423 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MEFQAVVMAV GGGSRMTDLT SSIPKPLLPV GNKPLIWYPL NLLERVGFEE VIVVTTRDVQ KALCAEFKMK MKPDIVCIPD DADMGTADS LRYIYPKLKT DVLVLSCDLI TDVALHEVVD LFRAYDASLA MLMRKGQDSI EPVPGQKGKK KAVEQRDFIG V DSTGKRLL ...String:
MEFQAVVMAV GGGSRMTDLT SSIPKPLLPV GNKPLIWYPL NLLERVGFEE VIVVTTRDVQ KALCAEFKMK MKPDIVCIPD DADMGTADS LRYIYPKLKT DVLVLSCDLI TDVALHEVVD LFRAYDASLA MLMRKGQDSI EPVPGQKGKK KAVEQRDFIG V DSTGKRLL FMANEADLDE ELVIKGSILQ KHPRIRFHTG LVDAHLYCLK KYIVDFLMEN GSITSIRSEL IPYLVRKQFS SA SSQQGQE EKEEDLKKKE LKSLDIYSFI KEANTLNLAP YDACWNACRG DRWEDLSRSQ VRCYVHIMKE GLCSRVSTLG LYM EANRQV PKLLSALCPE EPPVHSSAQI VSKHLVGVDS LIGPETQIGE KSSIKRSVIG SSCLIKDRVT ITNCLLMNSV TVEE GSNIQ GSVICNNAVI EKGADIKDCL IGSGQRIEAK AKRVNEVIVG NDQLMEI

UniProtKB: Translation initiation factor eIF2B subunit gamma

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Macromolecule #6: Non-structural protein NS-S

MacromoleculeName: Non-structural protein NS-S / type: protein_or_peptide / ID: 6 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Sandfly fever sicilian virus
Molecular weightTheoretical: 30.668383 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MNSQYMFDYP AINIDVRCHR LLSSVSYVAY NKFHTHDVST YEHCEIPLEK LRLGFGRRNS LADFYSLGEL PASWGPACYF SSVKPMMYT FQGMASDLSR FDLTSFSRKG LPNVLKALSW PLGIPDCEIF SICSDRFVRG LQTRDQLMSY ILRMGDSHSL D ECIVQAHK ...String:
MNSQYMFDYP AINIDVRCHR LLSSVSYVAY NKFHTHDVST YEHCEIPLEK LRLGFGRRNS LADFYSLGEL PASWGPACYF SSVKPMMYT FQGMASDLSR FDLTSFSRKG LPNVLKALSW PLGIPDCEIF SICSDRFVRG LQTRDQLMSY ILRMGDSHSL D ECIVQAHK KILQEARRLG LSDEHYNGYD LFREIGSLVC LRLINAEPFD TASSGEALDV RTVIRSYRAS DPSTGLTEYG NS LWTPIHS HVDENDESSS DSDFGSHHHH HH

UniProtKB: Non-structural protein NS-S

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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

BufferpH: 7.5
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: 67.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 137093
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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