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- EMDB-56933: Cryo-EM structure of the human UAP56-RNA - LENG8-PCID2-SEM1 complex -

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Entry
Database: EMDB / ID: EMD-56933
TitleCryo-EM structure of the human UAP56-RNA - LENG8-PCID2-SEM1 complex
Map dataCryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map F)
Sample
  • Complex: Human UAP56-RNA - LENG8-PCID2-SEM1 complex
    • Complex: Human LENG8-PCID2-SEM1 complex
      • Protein or peptide: Maltose/maltodextrin-binding periplasmic protein,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8
      • Protein or peptide: PCI domain-containing protein 2
      • Protein or peptide: 26S proteasome complex subunit SEM1
    • Complex: Human UAP56-RNA complex
      • Protein or peptide: Spliceosome RNA helicase DDX39B
      • RNA: RNA (5'-R(P*UP*UP*UP*UP*UP*U)-3')
KeywordsmRNA export / GENE REGULATION
Function / homology
Function and homology information


negative regulation of lymphoid progenitor cell differentiation / transcription export complex / U6 snRNP / transcription export complex 2 / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / nuclear pore nuclear basket / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / ATP-dependent activity, acting on RNA / mRNA 3'-end processing ...negative regulation of lymphoid progenitor cell differentiation / transcription export complex / U6 snRNP / transcription export complex 2 / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / nuclear pore nuclear basket / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / ATP-dependent activity, acting on RNA / mRNA 3'-end processing / integrator complex / ATP-dependent protein binding / RNA export from nucleus / Transport of Mature mRNA derived from an Intron-Containing Transcript / U4 snRNA binding / proteasome regulatory particle, lid subcomplex / RNA Polymerase II Transcription Termination / U4 snRNP / positive regulation of B cell differentiation / poly(A)+ mRNA export from nucleus / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / negative regulation of gene expression, epigenetic / Resolution of D-loop Structures through Holliday Junction Intermediates / spliceosomal complex assembly / Impaired BRCA2 binding to RAD51 / Presynaptic phase of homologous DNA pairing and strand exchange / U6 snRNA binding / RHOBTB2 GTPase cycle / mRNA export from nucleus / proteasome assembly / spleen development / mRNA Splicing - Major Pathway / RNA splicing / proteasome complex / spliceosomal complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / ubiquitin binding / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / transcription elongation by RNA polymerase II / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / AUF1 (hnRNP D0) binds and destabilizes mRNA / TNFR2 non-canonical NF-kB pathway / Assembly of the pre-replicative complex / Vpu mediated degradation of CD4 / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / mRNA splicing, via spliceosome / Dectin-1 mediated noncanonical NF-kB signaling / Degradation of DVL / Degradation of AXIN / Degradation of CRY and PER proteins / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / G2/M Checkpoints / Degradation of GLI1 by the proteasome / Hedgehog ligand biogenesis / Regulation of RUNX3 expression and activity / Autodegradation of the E3 ubiquitin ligase COP1 / Defective CFTR causes cystic fibrosis / Negative regulation of NOTCH4 signaling / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / Hedgehog 'on' state / Vif-mediated degradation of APOBEC3G / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / MAPK6/MAPK4 signaling / double-strand break repair via homologous recombination / Degradation of CDH1 / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / CDK-mediated phosphorylation and removal of Cdc6 / HDR through Homologous Recombination (HRR) / ABC-family protein mediated transport / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / FCERI mediated NF-kB activation / Regulation of expression of SLITs and ROBOs / Regulation of PTEN stability and activity / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RUNX2 expression and activity / Regulation of RAS by GAPs / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / UCH proteinases / KEAP1-NFE2L2 pathway
Similarity search - Function
Csn12 family / SAC3/GANP/THP3, conserved domain / SAC3/GANP/THP3 / SAC3/GANP family / DSS1/SEM1 / DSS1/SEM1 family / DSS1_SEM1 / RNA helicase, DEAD-box type, Q motif / PCI/PINT associated module / DEAD-box RNA helicase Q motif profile. ...Csn12 family / SAC3/GANP/THP3, conserved domain / SAC3/GANP/THP3 / SAC3/GANP family / DSS1/SEM1 / DSS1/SEM1 family / DSS1_SEM1 / RNA helicase, DEAD-box type, Q motif / PCI/PINT associated module / DEAD-box RNA helicase Q motif profile. / PCI domain / Proteasome component (PCI) domain / PCI domain profile. / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / Helicase conserved C-terminal domain / helicase superfamily c-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / Winged helix-like DNA-binding domain superfamily / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
26S proteasome complex subunit SEM1 / Spliceosome RNA helicase DDX39B / PCI domain-containing protein 2 / Leukocyte receptor cluster member 8
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 6.2 Å
AuthorsHohmann U / Graf M / Plaschka C
Funding supportEuropean Union, 3 items
OrganizationGrant numberCountry
European Research Council (ERC)949081European Union
H2020 Marie Curie Actions of the European Commission896416European Union
European Molecular Biology Organization (EMBO)ALTF_1175-2019European Union
CitationJournal: Nature / Year: 2026
Title: Molecular basis of polyadenylated RNA fate determination in the nucleus
Authors: Hohmann U / Graf M / Plaschka C
History
DepositionFeb 25, 2026-
Header (metadata) releaseJun 24, 2026-
Map releaseJun 24, 2026-
UpdateJun 24, 2026-
Current statusJun 24, 2026Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_56933.png

Downloads & links

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Map

FileDownload / File: emd_56933.map.gz / Format: CCP4 / Size: 8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationCryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map F)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.8 Å/pix.
x 128 pix.
= 230.4 Å		1.8 Å/pix.
x 128 pix.
= 230.4 Å		1.8 Å/pix.
x 128 pix.
= 230.4 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.8 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0962
Minimum - Maximum-0.22567607 - 1.1496087
Average (Standard dev.)-0.00016217449 (±0.02838694)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions128128128
Spacing128128128
CellA=B=C: 230.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Cryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map...

Fileemd_56933_additional_1.map
AnnotationCryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map F), low-pass filtered to 10 A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Cryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map...

Fileemd_56933_half_map_1.map
AnnotationCryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map F), half map A
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Cryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map...

Fileemd_56933_half_map_2.map
AnnotationCryo-EM map of the human UAP56-RNA-LENG8-PCID2-SEM1 complex (Map F), half map B
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 UAP56-RNA - LENG8-PCID2-SEM1 complex

EntireName: Human UAP56-RNA - LENG8-PCID2-SEM1 complex
Components
  • Complex: Human UAP56-RNA - LENG8-PCID2-SEM1 complex
    • Complex: Human LENG8-PCID2-SEM1 complex
      • Protein or peptide: Maltose/maltodextrin-binding periplasmic protein,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8
      • Protein or peptide: PCI domain-containing protein 2
      • Protein or peptide: 26S proteasome complex subunit SEM1
    • Complex: Human UAP56-RNA complex
      • Protein or peptide: Spliceosome RNA helicase DDX39B
      • RNA: RNA (5'-R(P*UP*UP*UP*UP*UP*U)-3')

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Supramolecule #1: Human UAP56-RNA - LENG8-PCID2-SEM1 complex

SupramoleculeName: Human UAP56-RNA - LENG8-PCID2-SEM1 complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #2: Human LENG8-PCID2-SEM1 complex

SupramoleculeName: Human LENG8-PCID2-SEM1 complex / type: complex / ID: 2 / Parent: 1 / Macromolecule list: #1-#3
Source (natural)Organism: Homo sapiens (human)

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Supramolecule #3: Human UAP56-RNA complex

SupramoleculeName: Human UAP56-RNA complex / type: complex / ID: 3 / Parent: 1 / Macromolecule list: #4-#5
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Maltose/maltodextrin-binding periplasmic protein,Leukocyte recept...

MacromoleculeName: Maltose/maltodextrin-binding periplasmic protein,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8,Leukocyte receptor cluster member 8
type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 76.829578 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MKIEEGKLVI WINGDKGYNG LAEVGKKFEK DTGIKVTVEH PDKLEEKFPQ VAATGDGPDI IFWAHDRFGG YAQSGLLAEI TPDKAFQDK LYPFTWDAVR YNGKLIAYPI AVEALSLIYN KDLLPNPPKT WEEIPALDKE LKAKGKSALM FNLQEPYFTW P LIAADGGY ...String:
MKIEEGKLVI WINGDKGYNG LAEVGKKFEK DTGIKVTVEH PDKLEEKFPQ VAATGDGPDI IFWAHDRFGG YAQSGLLAEI TPDKAFQDK LYPFTWDAVR YNGKLIAYPI AVEALSLIYN KDLLPNPPKT WEEIPALDKE LKAKGKSALM FNLQEPYFTW P LIAADGGY AFKYENGKYD IKDVGVDNAG AKAGLTFLVD LIKNKHMNAD TDYSIAEAAF NKGETAMTIN GPWAWSNIDT SK VNYGVTV LPTFKGQPSK PFVGVLSAGI NAASPNKELA KEFLENYLLT DEGLEAVNKD KPLGAVALKS YEEELAKDPR IAA TMENAQ KGEIMPNIPQ MSAFWYAVRT AVINAASGRQ TVDEALKDAQ TSSGLEVLFQ GPSRKKMAAL ECEDPERELK KQKR AARFQ HGHSRRLRLE PLVLQMSSLE SSGADPDWQE LQIVGTCPDI TKHYLRLTCA PDPSTVRPVA VLKKSLCMVK CHWKE KQDY AFACEQMKSI RQDLTVQGIR TEFTVEVYET HARIALEKGD HEEFNQCQTQ LKSLYAENLP GNVGEFTAYR ILYYIF TKN SGDITTELAY LTRELKADPC VAHALALRTA WALGNYHRFF RLYCHAPCMS GYLVDKFADR ERKVALKAMI KTFRPAL PV SYLQAELAFE GEAACRAFLE PLGLAYTGPD NSSIDCRLSL AQLSAF

UniProtKB: Leukocyte receptor cluster member 8

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Macromolecule #2: PCI domain-containing protein 2

MacromoleculeName: PCI domain-containing protein 2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 51.713254 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: GKPIPNPLLG LDSTGSGKPI PNPLLGLDST GSGKPIPNPL LGLDSTSSGL EVLFQGPMAH ITINQYLQQV YEAIDSRDGA SCAELVSFK HPHVANPRLQ MASPEEKCQQ VLEPPYDEMF AAHLRCTYAV GNHDFIEAYK CQTVIVQSFL RAFQAHKEEN W ALPVMYAV ...String:
GKPIPNPLLG LDSTGSGKPI PNPLLGLDST GSGKPIPNPL LGLDSTSSGL EVLFQGPMAH ITINQYLQQV YEAIDSRDGA SCAELVSFK HPHVANPRLQ MASPEEKCQQ VLEPPYDEMF AAHLRCTYAV GNHDFIEAYK CQTVIVQSFL RAFQAHKEEN W ALPVMYAV ALDLRVFANN ADQQLVKKGK SKVGDMLEKA AELLMSCFRV CASDTRAGIE DSKKWGMLFL VNQLFKIYFK IN KLHLCKP LIRAIDSSNL KDDYSTAQRV TYKYYVGRKA MFDSDFKQAE EYLSFAFEHC HRSSQKNKRM ILIYLLPVKM LLG HMPTVE LLKKYHLMQF AEVTRAVSEG NLLLLHEALA KHEAFFIRCG IFLILEKLKI ITYRNLFKKV YLLLKTHQLS LDAF LVALK FMQVEDVDID EVQCILANLI YMGHVKGYIS HQHQKLVVSK QNPFPPLSTV C

UniProtKB: PCI domain-containing protein 2

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Macromolecule #3: 26S proteasome complex subunit SEM1

MacromoleculeName: 26S proteasome complex subunit SEM1 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 5.819958 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
FPAEDWAGLD EDEDAHVWED NWDDDNVEDD FSNQLRAELE KHGYKMETS

UniProtKB: 26S proteasome complex subunit SEM1

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Macromolecule #4: Spliceosome RNA helicase DDX39B

MacromoleculeName: Spliceosome RNA helicase DDX39B / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO / EC number: RNA helicase
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 49.05625 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MAENDVDNEL LDYEDDEVET AAGGDGAEAP AKKDVKGSYV SIHSSGFRDF LLKPELLRAI VDCGFEHPSE VQHECIPQAI LGMDVLCQA KSGMGKTAVF VLATLQQLEP VTGQVSVLVM CHTRELAFQI SKEYERFSKY MPNVKVAVFF GGLSIKKDEE V LKKNCPHI ...String:
MAENDVDNEL LDYEDDEVET AAGGDGAEAP AKKDVKGSYV SIHSSGFRDF LLKPELLRAI VDCGFEHPSE VQHECIPQAI LGMDVLCQA KSGMGKTAVF VLATLQQLEP VTGQVSVLVM CHTRELAFQI SKEYERFSKY MPNVKVAVFF GGLSIKKDEE V LKKNCPHI VVGTPGRILA LARNKSLNLK HIKHFILDEC DKMLEQLDMR RDVQEIFRMT PHEKQVMMFS ATLSKEIRPV CR KFMQDPM EIFVDDETKL TLHGLQQYYV KLKDNEKNRK LFDLLDVLEF NQVVIFVKSV QRCIALAQLL VEQNFPAIAI HRG MPQEER LSRYQQFKDF QRRILVATNL FGRGMDIERV NIAFNYDMPE DSDTYLHRVA RAGRFGTKGL AITFVSDEND AKIL NDVQD RFEVNISELP DEIDISSYIE QTR

UniProtKB: Spliceosome RNA helicase DDX39B

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Macromolecule #5: RNA (5'-R(P*UP*UP*UP*UP*UP*U)-3')

MacromoleculeName: RNA (5'-R(P*UP*UP*UP*UP*UP*U)-3') / type: rna / ID: 5 / Number of copies: 1
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 1.792037 KDa
SequenceString:
UUUUUU

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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

Concentration0.5 mg/mL
BufferpH: 7.9
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 281 K / Instrument: LEICA EM GP

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k 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: 2.5 µm / Nominal defocus min: 1.0 µm
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final reconstructionResolution.type: BY AUTHOR / Resolution: 6.2 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 7866
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD

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