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- EMDB-27327: PI 3-kinase alpha with nanobody 3-126 -

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Basic information

Entry
Database: EMDB / ID: EMD-27327
TitlePI 3-kinase alpha with nanobody 3-126
Map dataHuman PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound, sharpened map
Sample
  • Complex: Human PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound
    • Protein or peptide: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
    • Protein or peptide: Phosphatidylinositol 3-kinase regulatory subunit alpha
  • Ligand: water
KeywordsPhosphoinositide 3-kinase (PI3K) / activation / inhibition / nanobody / conformational changes / STRUCTURAL PROTEIN / TRANSFERASE
Function / homology
Function and homology information


perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / negative regulation of actin filament depolymerization / phosphatidylinositol kinase activity / response to L-leucine / regulation of actin filament organization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / positive regulation of focal adhesion disassembly ...perinuclear endoplasmic reticulum membrane / regulation of toll-like receptor 4 signaling pathway / response to muscle inactivity / negative regulation of actin filament depolymerization / phosphatidylinositol kinase activity / response to L-leucine / regulation of actin filament organization / response to butyrate / phosphatidylinositol 3-kinase regulator activity / positive regulation of focal adhesion disassembly / IRS-mediated signalling / phosphatidylinositol 3-kinase activator activity / 1-phosphatidylinositol-3-kinase regulator activity / positive regulation of endoplasmic reticulum unfolded protein response / interleukin-18-mediated signaling pathway / myeloid leukocyte migration / autosome genomic imprinting / phosphatidylinositol 3-kinase complex / T follicular helper cell differentiation / PI3K events in ERBB4 signaling / cellular response to hydrostatic pressure / phosphatidylinositol 3-kinase regulatory subunit binding / regulation of cellular respiration / neurotrophin TRKA receptor binding / positive regulation of protein localization to membrane / Activated NTRK2 signals through PI3K / cis-Golgi network / negative regulation of fibroblast apoptotic process / Activated NTRK3 signals through PI3K / ErbB-3 class receptor binding / transmembrane receptor protein tyrosine kinase adaptor activity / phosphatidylinositol 3-kinase complex, class IB / vasculature development / 1-phosphatidylinositol-4-phosphate 3-kinase activity / Signaling by cytosolic FGFR1 fusion mutants / Co-stimulation by ICOS / cardiac muscle cell contraction / RHOD GTPase cycle / RHOF GTPase cycle / phosphatidylinositol 3-kinase complex, class IA / kinase activator activity / Nephrin family interactions / anoikis / Signaling by LTK in cancer / phosphatidylinositol-3-phosphate biosynthetic process / positive regulation of leukocyte migration / Signaling by LTK / MET activates PI3K/AKT signaling / PI3K/AKT activation / 1-phosphatidylinositol-4,5-bisphosphate 3-kinase activity / negative regulation of stress fiber assembly / RND1 GTPase cycle / phosphatidylinositol-4,5-bisphosphate 3-kinase / positive regulation of filopodium assembly / RND2 GTPase cycle / phosphatidylinositol 3-kinase / vascular endothelial growth factor signaling pathway / RND3 GTPase cycle / relaxation of cardiac muscle / insulin binding / growth hormone receptor signaling pathway / 1-phosphatidylinositol-3-kinase activity / Signaling by ALK / RHOV GTPase cycle / PI-3K cascade:FGFR3 / RHOB GTPase cycle / natural killer cell mediated cytotoxicity / Erythropoietin activates Phosphoinositide-3-kinase (PI3K) / negative regulation of macroautophagy / GP1b-IX-V activation signalling / PI-3K cascade:FGFR2 / phosphatidylinositol-mediated signaling / PI-3K cascade:FGFR4 / PI-3K cascade:FGFR1 / RHOC GTPase cycle / RHOJ GTPase cycle / intracellular glucose homeostasis / phosphatidylinositol phosphate biosynthetic process / negative regulation of osteoclast differentiation / Synthesis of PIPs at the plasma membrane / response to dexamethasone / RHOU GTPase cycle / CDC42 GTPase cycle / negative regulation of anoikis / RET signaling / PI3K events in ERBB2 signaling / protein kinase activator activity / insulin receptor substrate binding / T cell differentiation / Interleukin-3, Interleukin-5 and GM-CSF signaling / extrinsic apoptotic signaling pathway via death domain receptors / PI3K Cascade / RHOG GTPase cycle / regulation of multicellular organism growth / intercalated disc / negative regulation of cell-matrix adhesion / CD28 dependent PI3K/Akt signaling / RHOA GTPase cycle / positive regulation of TOR signaling / RAC2 GTPase cycle
Similarity search - Function
PI3Kalpha, catalytic domain / Phosphatidylinositol 3-kinase regulatory subunit alpha, SH3 domain / PIK3R1, inter-SH2 domain / PI3K p85 subunit, C-terminal SH2 domain / PI3K regulatory subunit p85-related , inter-SH2 domain / PI3K p85 subunit, N-terminal SH2 domain / Phosphatidylinositol 3-kinase regulatory subunit P85 inter-SH2 domain / PI3-kinase family, p85-binding domain / PI3-kinase family, p85-binding domain / Rho GTPase-activating protein domain ...PI3Kalpha, catalytic domain / Phosphatidylinositol 3-kinase regulatory subunit alpha, SH3 domain / PIK3R1, inter-SH2 domain / PI3K p85 subunit, C-terminal SH2 domain / PI3K regulatory subunit p85-related , inter-SH2 domain / PI3K p85 subunit, N-terminal SH2 domain / Phosphatidylinositol 3-kinase regulatory subunit P85 inter-SH2 domain / PI3-kinase family, p85-binding domain / PI3-kinase family, p85-binding domain / Rho GTPase-activating protein domain / RhoGAP domain / Rho GTPase-activating proteins domain profile. / GTPase-activator protein for Rho-like GTPases / Phosphatidylinositol 3-kinase, adaptor-binding domain / Phosphatidylinositol 3-kinase adaptor-binding (PI3K ABD) domain profile. / PI3-kinase family, Ras-binding domain / Phosphatidylinositol 3-kinase Ras-binding (PI3K RBD) domain / PI3-kinase family, ras-binding domain / Phosphatidylinositol 3-kinase Ras-binding (PI3K RBD) domain profile. / Rho GTPase activation protein / C2 phosphatidylinositol 3-kinase-type domain / Phosphoinositide 3-kinase C2 / C2 phosphatidylinositol 3-kinase (PI3K)-type domain profile. / Phosphoinositide 3-kinase, region postulated to contain C2 domain / Phosphoinositide 3-kinase family, accessory domain (PIK domain) / Phosphoinositide 3-kinase family, accessory domain (PIK domain) / Phosphoinositide 3-kinase, accessory (PIK) domain superfamily / Phosphoinositide 3-kinase, accessory (PIK) domain / Phosphatidylinositol kinase / PIK helical domain profile. / Phosphatidylinositol 3- and 4-kinases signature 1. / Phosphatidylinositol 3/4-kinase, conserved site / Phosphatidylinositol 3- and 4-kinases signature 2. / Phosphatidylinositol 3-/4-kinase, catalytic domain superfamily / Phosphoinositide 3-kinase, catalytic domain / Phosphatidylinositol 3- and 4-kinase / Phosphatidylinositol 3- and 4-kinases catalytic domain profile. / Phosphatidylinositol 3-/4-kinase, catalytic domain / C2 domain superfamily / SH2 domain / Src homology 2 (SH2) domain profile. / Src homology 2 domains / SH2 domain / SH2 domain superfamily / Src homology 3 domains / SH3-like domain superfamily / Src homology 3 (SH3) domain profile. / SH3 domain / Armadillo-type fold / Ubiquitin-like domain superfamily / Protein kinase-like domain superfamily
Similarity search - Domain/homology
Phosphatidylinositol 3-kinase regulatory subunit alpha / Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.41 Å
AuthorsHart JR / Liu X / Pan C / Liang A / Ueno L / Xu Y / Quezada A / Zou X / Yang S / Zhou Q ...Hart JR / Liu X / Pan C / Liang A / Ueno L / Xu Y / Quezada A / Zou X / Yang S / Zhou Q / Schoonooghe S / Hassanzadeh-Ghassabeh G / Xia T / Shui W / Yang D / Vogt PK / Wang M-W
Funding support United States, China, 15 items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R35 CA197582 United States
National Institutes of Health/National Cancer Institute (NIH/NCI)R50 CA243899 United States
National Natural Science Foundation of China (NSFC)81872915 China
National Natural Science Foundation of China (NSFC)82073904 China
National Natural Science Foundation of China (NSFC)82121005 China
National Natural Science Foundation of China (NSFC)81973373 China
National Natural Science Foundation of China (NSFC)31971362 China
National Natural Science Foundation of China (NSFC)32171439 China
National Natural Science Foundation of China (NSFC)21704064 China
Other government2018ZX09735 001
Other government2018ZX09711002 002 005
Other government2021ZD0203400
Other government2018YFA0507000
Other privateNNCAS 2017 1 CC
Hainan Provincial Major Science and Technology ProjectZDKJ2021028 China
CitationJournal: Proc Natl Acad Sci U S A / Year: 2022
Title: Nanobodies and chemical cross-links advance the structural and functional analysis of PI3Kα.
Authors: Jonathan R Hart / Xiao Liu / Chen Pan / Anyi Liang / Lynn Ueno / Yingna Xu / Alexandra Quezada / Xinyu Zou / Su Yang / Qingtong Zhou / Steve Schoonooghe / Gholamreza Hassanzadeh-Ghassabeh / ...Authors: Jonathan R Hart / Xiao Liu / Chen Pan / Anyi Liang / Lynn Ueno / Yingna Xu / Alexandra Quezada / Xinyu Zou / Su Yang / Qingtong Zhou / Steve Schoonooghe / Gholamreza Hassanzadeh-Ghassabeh / Tian Xia / Wenqing Shui / Dehua Yang / Peter K Vogt / Ming-Wei Wang /
Abstract: Nanobodies and chemical cross-linking were used to gain information on the identity and positions of flexible domains of PI3Kα. The application of chemical cross-linking mass spectrometry (CXMS) ...Nanobodies and chemical cross-linking were used to gain information on the identity and positions of flexible domains of PI3Kα. The application of chemical cross-linking mass spectrometry (CXMS) facilitated the identification of the p85 domains BH, cSH2, and SH3 as well as their docking positions on the PI3Kα catalytic core. Binding of individual nanobodies to PI3Kα induced activation or inhibition of enzyme activity and caused conformational changes that could be correlated with enzyme function. Binding of nanobody Nb3-126 to the BH domain of p85α substantially improved resolution for parts of the PI3Kα complex, and binding of nanobody Nb3-159 induced a conformation of PI3Kα that is distinct from known PI3Kα structures. The analysis of CXMS data also provided mechanistic insights into the molecular underpinning of the flexibility of PI3Kα.
History
DepositionJun 17, 2022-
Header (metadata) releaseSep 21, 2022-
Map releaseSep 21, 2022-
UpdateJun 12, 2024-
Current statusJun 12, 2024Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_27327.png

Downloads & links

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Map

FileDownload / File: emd_27327.map.gz / Format: CCP4 / Size: 42 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationHuman PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound, sharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesX (Sec.)Y (Row.)Z (Col.)
0.54 Å/pix.
x 200 pix.
= 107. Å		0.54 Å/pix.
x 250 pix.
= 133.75 Å		0.54 Å/pix.
x 220 pix.
= 117.7 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

generated in cubic-lattice coordinate

Voxel sizeX=Y=Z: 0.535 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 1.0
Minimum - Maximum-9.281601999999999 - 18.852785000000001
Average (Standard dev.)-0.000000000016024 (±1.0)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderZYX
Origin164140144
Dimensions250220200
Spacing200250220
CellA: 107.00001 Å / B: 133.75 Å / C: 117.700005 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_27327_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Human PI 3-kinase alpha complex composed of p110alpha...

Fileemd_27327_half_map_1.map
AnnotationHuman PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound, half map 1
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Human PI 3-kinase alpha complex composed of p110alpha...

Fileemd_27327_half_map_2.map
AnnotationHuman PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound, half 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 : Human PI 3-kinase alpha complex composed of p110alpha and p85alph...

EntireName: Human PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound
Components
  • Complex: Human PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound
    • Protein or peptide: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
    • Protein or peptide: Phosphatidylinositol 3-kinase regulatory subunit alpha
  • Ligand: water

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Supramolecule #1: Human PI 3-kinase alpha complex composed of p110alpha and p85alph...

SupramoleculeName: Human PI 3-kinase alpha complex composed of p110alpha and p85alpha with nanobody 3-126 bound
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit ...

MacromoleculeName: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: phosphatidylinositol-4,5-bisphosphate 3-kinase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 127.822578 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MSYYHHHHHH DYDIPTTENL YFQGAMGSMP PRPSSGELWG IHLMPPRILV ECLLPNGMIV TLECLREATL ITIKHELFKE ARKYPLHQL LQDESSYIFV SVTQEAEREE FFDETRRLCD LRLFQPFLKV IEPVGNREEK ILNREIGFAI GMPVCEFDMV K DPEVQDFR ...String:
MSYYHHHHHH DYDIPTTENL YFQGAMGSMP PRPSSGELWG IHLMPPRILV ECLLPNGMIV TLECLREATL ITIKHELFKE ARKYPLHQL LQDESSYIFV SVTQEAEREE FFDETRRLCD LRLFQPFLKV IEPVGNREEK ILNREIGFAI GMPVCEFDMV K DPEVQDFR RNILNVCKEA VDLRDLNSPH SRAMYVYPPN VESSPELPKH IYNKLDKGQI IVVIWVIVSP NNDKQKYTLK IN HDCVPEQ VIAEAIRKKT RSMLLSSEQL KLCVLEYQGK YILKVCGCDE YFLEKYPLSQ YKYIRSCIML GRMPNLMLMA KES LYSQLP MDCFTMPSYS RRISTATPYM NGETSTKSLW VINSALRIKI LCATYVNVNI RDIDKIYVRT GIYHGGEPLC DNVN TQRVP CSNPRWNEWL NYDIYIPDLP RAARLCLSIC SVKGRKGAKE EHCPLAWGNI NLFDYTDTLV SGKMALNLWP VPHGL EDLL NPIGVTGSNP NKETPCLELE FDWFSSVVKF PDMSVIEEHA NWSVSREAGF SYSHAGLSNR LARDNELREN DKEQLK AIS TRDPLSEITE QEKDFLWSHR HYCVTIPEIL PKLLLSVKWN SRDEVAQMYC LVKDWPPIKP EQAMELLDCN YPDPMVR GF AVRCLEKYLT DDKLSQYLIQ LVQVLKYEQY LDNLLVRFLL KKALTNQRIG HFFFWHLKSE MHNKTVSQRF GLLLESYC R ACGMYLKHLN RQVEAMEKLI NLTDILKQEK KDETQKVQMK FLVEQMRRPD FMDALQGFLS PLNPAHQLGN LRLEECRIM SSAKRPLWLN WENPDIMSEL LFQNNEIIFK NGDDLRQDML TLQIIRIMEN IWQNQGLDLR MLPYGCLSIG DCVGLIEVVR NSHTIMQIQ CKGGLKGALQ FNSHTLHQWL KDKNKGEIYD AAIDLFTRSC AGYCVATFIL GIGDRHNSNI MVKDDGQLFH I DFGHFLDH KKKKFGYKRE RVPFVLTQDF LIVISKGAQE CTKTREFERF QEMCYKAYLA IRQHANLFIN LFSMMLGSGM PE LQSFDDI AYIRKTLALD KTEQEALEYF MKQMNDAHHG GWTTKMDWIF HTIKQHALN

UniProtKB: Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform

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Macromolecule #2: Phosphatidylinositol 3-kinase regulatory subunit alpha

MacromoleculeName: Phosphatidylinositol 3-kinase regulatory subunit alpha
type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 83.623203 KDa
Recombinant expressionOrganism: Trichoplusia ni (cabbage looper)
SequenceString: MAEGYQYRAL YDYKKEREED IDLHLGDILT VNKGSLVALG FSDGQEARPE EIGWLNGYNE TTGERGDFPG TYVEYIGRKK ISPPTPKPR PPRPLPVAPG SSKTEADVEQ QALTLPDLAE QFAPPDIAPP LLIKLVEAIE KKGLECSTLY RTQSSSNLAE L RQLLDCDT ...String:
MAEGYQYRAL YDYKKEREED IDLHLGDILT VNKGSLVALG FSDGQEARPE EIGWLNGYNE TTGERGDFPG TYVEYIGRKK ISPPTPKPR PPRPLPVAPG SSKTEADVEQ QALTLPDLAE QFAPPDIAPP LLIKLVEAIE KKGLECSTLY RTQSSSNLAE L RQLLDCDT PSVDLEMIDV HVLADAFKRY LLDLPNPVIP AAVYSEMISL APEVQSSEEY IQLLKKLIRS PSIPHQYWLT LQ YLLKHFF KLSQTSSKNL LNARVLSEIF SPMLFRFSAA SSDNTENLIK VIEILISTEW NERQPAPALP PKPPKPTTVA NNG MNNNMS LQDAEWYWGD ISREEVNEKL RDTADGTFLV RDASTKMHGD YTLTLRKGGN NKLIKIFHRD GKYGFSDPLT FSSV VELIN HYRNESLAQY NPKLDVKLLY PVSKYQQDQV VKEDNIEAVG KKLHEYNTQF QEKSREYDRL YEEYTRTSQE IQMKR TAIE AFNETIKIFE EQCQTQERYS KEYIEKFKRE GNEKEIQRIM HNYDKLKSRI SEIIDSRRRL EEDLKKQAAE YREIDK RMN SIKPDLIQLR KTRDQYLMWL TQKGVRQKKL NEWLGNENTE DQYSLVEDDE DLPHHDEKTW NVGSSNRNKA ENLLRGK RD GTFLVRESSK QGCYACSVVV DGEVKHCVIN KTATGYGFAE PYNLYSSLKE LVLHYQHTSL VQHNDSLNVT LAYPVYAQ Q RR

UniProtKB: Phosphatidylinositol 3-kinase regulatory subunit alpha

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Macromolecule #3: water

MacromoleculeName: water / type: ligand / ID: 3 / Number of copies: 21 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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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

Concentration1.0 mg/mL
BufferpH: 7.6
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: 70.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: OTHER
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.41 Å / Resolution method: DIFFRACTION PATTERN/LAYERLINES / Number images used: 506412
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

7myn


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Overall B value: 43.84 / Target criteria: Correlation coefficient
Output model

PDB-8dcp:
PI 3-kinase alpha with nanobody 3-126

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