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- EMDB-24057: Single particle cryo-EM structure of the Chaetomium thermophilum ... -
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Basic information
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Title | Single particle cryo-EM structure of the Chaetomium thermophilum Nup192-Nic96-Nup53-Nup145N complex (Nup192 residues 1-1756; Nic96 residues 240-301; Nup53 31-67; Nup145N 616-683) | |||||||||||||||
![]() | Unsharpened map generated with cryoSPARC NU refine | |||||||||||||||
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![]() | nuclear pore complex / nucleocytoplasmic transport / alpha-helical solenoid / nuclear pore / TRANSPORT PROTEIN | |||||||||||||||
Function / homology | ![]() nuclear pore inner ring / telomere tethering at nuclear periphery / nuclear pore organization / nuclear pore cytoplasmic filaments / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / structural constituent of nuclear pore / RNA export from nucleus / poly(A)+ mRNA export from nucleus / nuclear localization sequence binding / Hydrolases; Acting on peptide bonds (peptidases); Serine endopeptidases ...nuclear pore inner ring / telomere tethering at nuclear periphery / nuclear pore organization / nuclear pore cytoplasmic filaments / post-transcriptional tethering of RNA polymerase II gene DNA at nuclear periphery / structural constituent of nuclear pore / RNA export from nucleus / poly(A)+ mRNA export from nucleus / nuclear localization sequence binding / Hydrolases; Acting on peptide bonds (peptidases); Serine endopeptidases / mRNA transport / nuclear pore / protein import into nucleus / protein transport / nuclear membrane / hydrolase activity / RNA binding Similarity search - Function | |||||||||||||||
Biological species | ![]() ![]() | |||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.22 Å | |||||||||||||||
![]() | Petrovic S / Samanta D / Perriches T / Bley CJ / Thierbach K / Brown B / Nie S / Mobbs GW / Stevens TA / Liu X ...Petrovic S / Samanta D / Perriches T / Bley CJ / Thierbach K / Brown B / Nie S / Mobbs GW / Stevens TA / Liu X / Tomaleri GP / Schaus L / Hoelz A | |||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Architecture of the linker-scaffold in the nuclear pore. Authors: Stefan Petrovic / Dipanjan Samanta / Thibaud Perriches / Christopher J Bley / Karsten Thierbach / Bonnie Brown / Si Nie / George W Mobbs / Taylor A Stevens / Xiaoyu Liu / Giovani Pinton ...Authors: Stefan Petrovic / Dipanjan Samanta / Thibaud Perriches / Christopher J Bley / Karsten Thierbach / Bonnie Brown / Si Nie / George W Mobbs / Taylor A Stevens / Xiaoyu Liu / Giovani Pinton Tomaleri / Lucas Schaus / André Hoelz / ![]() Abstract: INTRODUCTION In eukaryotic cells, the selective bidirectional transport of macromolecules between the nucleus and cytoplasm occurs through the nuclear pore complex (NPC). Embedded in nuclear envelope ...INTRODUCTION In eukaryotic cells, the selective bidirectional transport of macromolecules between the nucleus and cytoplasm occurs through the nuclear pore complex (NPC). Embedded in nuclear envelope pores, the ~110-MDa human NPC is an ~1200-Å-wide and ~750-Å-tall assembly of ~1000 proteins, collectively termed nucleoporins. Because of the NPC's eightfold rotational symmetry along the nucleocytoplasmic axis, each of the ~34 different nucleoporins occurs in multiples of eight. Architecturally, the NPC's symmetric core is composed of an inner ring encircling the central transport channel and two outer rings anchored on both sides of the nuclear envelope. Because of its central role in the flow of genetic information from DNA to RNA to protein, the NPC is commonly targeted in viral infections and its nucleoporin constituents are associated with a plethora of diseases. RATIONALE Although the arrangement of most scaffold nucleoporins in the NPC's symmetric core was determined by quantitative docking of crystal structures into cryo-electron tomographic (cryo-ET) maps of intact NPCs, the topology and molecular details of their cohesion by multivalent linker nucleoporins have remained elusive. Recently, in situ cryo-ET reconstructions of NPCs from various species have indicated that the NPC's inner ring is capable of reversible constriction and dilation in response to variations in nuclear envelope membrane tension, thereby modulating the diameter of the central transport channel by ~200 Å. We combined biochemical reconstitution, high-resolution crystal and single-particle cryo-electron microscopy (cryo-EM) structure determination, docking into cryo-ET maps, and physiological validation to elucidate the molecular architecture of the linker-scaffold interaction network that not only is essential for the NPC's integrity but also confers the plasticity and robustness necessary to allow and withstand such large-scale conformational changes. RESULTS By biochemically mapping scaffold-binding regions of all fungal and human linker nucleoporins and determining crystal and single-particle cryo-EM structures of linker-scaffold complexes, we completed the characterization of the biochemically tractable linker-scaffold network and established its evolutionary conservation, despite considerable sequence divergence. We determined a series of crystal and single-particle cryo-EM structures of the intact Nup188 and Nup192 scaffold hubs bound to their Nic96, Nup145N, and Nup53 linker nucleoporin binding regions, revealing that both proteins form distinct question mark-shaped keystones of two evolutionarily conserved hetero‑octameric inner ring complexes. Linkers bind to scaffold surface pockets through short defined motifs, with flanking regions commonly forming additional disperse interactions that reinforce the binding. Using a structure‑guided functional analysis in , we confirmed the robustness of linker‑scaffold interactions and established the physiological relevance of our biochemical and structural findings. The near-atomic composite structures resulting from quantitative docking of experimental structures into human and cryo-ET maps of constricted and dilated NPCs structurally disambiguated the positioning of the Nup188 and Nup192 hubs in the intact fungal and human NPC and revealed the topology of the linker-scaffold network. The linker-scaffold gives rise to eight relatively rigid inner ring spokes that are flexibly interconnected to allow for the formation of lateral channels. Unexpectedly, we uncovered that linker‑scaffold interactions play an opposing role in the outer rings by forming tight cross-link staples between the eight nuclear and cytoplasmic outer ring spokes, thereby limiting the dilatory movements to the inner ring. CONCLUSION We have substantially advanced the structural and biochemical characterization of the symmetric core of the and human NPCs and determined near-atomic composite structures. The composite structures uncover the molecular mechanism by which the evolutionarily conserved linker‑scaffold establishes the NPC's integrity while simultaneously allowing for the observed plasticity of the central transport channel. The composite structures are roadmaps for the mechanistic dissection of NPC assembly and disassembly, the etiology of NPC‑associated diseases, the role of NPC dilation in nucleocytoplasmic transport of soluble and integral membrane protein cargos, and the anchoring of asymmetric nucleoporins. [Figure: see text]. | |||||||||||||||
History |
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 59.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 26.4 KB 26.4 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 11.6 KB | Display | ![]() |
Images | ![]() | 66 KB | ||
Masks | ![]() | 64 MB | ![]() | |
Filedesc metadata | ![]() | 7.7 KB | ||
Others | ![]() ![]() ![]() | 59.3 MB 3.9 MB 3.9 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7mvvMC ![]() 7mvtC ![]() 7mvuC ![]() 7mvwC ![]() 7mvxC ![]() 7mvyC ![]() 7mvzC ![]() 7mw0C ![]() 7mw1C ![]() 7tbiC ![]() 7tbjC ![]() 7tbkC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Annotation | Unsharpened map generated with cryoSPARC NU refine | ||||||||||||||||||||
Voxel size | X=Y=Z: 1.4208 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Mask #1
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-Additional map: Map sharpened with PHENIX Autosharpen model based local sharpening
File | emd_24057_additional_1.map | ||||||||||||
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Annotation | Map sharpened with PHENIX Autosharpen model based local sharpening | ||||||||||||
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Density Histograms |
-Half map: Half-dataset map generated with cryoSPARC
File | emd_24057_half_map_1.map | ||||||||||||
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Annotation | Half-dataset map generated with cryoSPARC | ||||||||||||
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Density Histograms |
-Half map: Half-dataset map generated with cryoSPARC
File | emd_24057_half_map_2.map | ||||||||||||
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Annotation | Half-dataset map generated with cryoSPARC | ||||||||||||
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Density Histograms |
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Sample components
-Entire : Nup192-Nic96-Nup53-Nup145N heterotetramer
Entire | Name: Nup192-Nic96-Nup53-Nup145N heterotetramer |
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Components |
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-Supramolecule #1: Nup192-Nic96-Nup53-Nup145N heterotetramer
Supramolecule | Name: Nup192-Nic96-Nup53-Nup145N heterotetramer / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 215.7 KDa |
-Macromolecule #1: Nucleoporin NUP192
Macromolecule | Name: Nucleoporin NUP192 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() Strain: DSM 1495 / CBS 144.50 / IMI 039719 |
Molecular weight | Theoretical: 200.047484 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: GPLMSGLNDI FEAQKIEWHE GSAGGSGHMT DLRKLEALQA LHAELVAVRQ HRFEGLQVLE TLLEEQTDAF KALIAKPARD TKDREALGK EPKKLKIGEE EYSLNEDFVN DCLKLADELD LNEKESARIL IDCDAEGDVE TQSRPLWECG VIRFHQERKY L LDCMRLIL ...String: GPLMSGLNDI FEAQKIEWHE GSAGGSGHMT DLRKLEALQA LHAELVAVRQ HRFEGLQVLE TLLEEQTDAF KALIAKPARD TKDREALGK EPKKLKIGEE EYSLNEDFVN DCLKLADELD LNEKESARIL IDCDAEGDVE TQSRPLWECG VIRFHQERKY L LDCMRLIL EIAADEDIDA GLQESFGVAA EDKIFGIPPP WERNKENQPT QVKKFIPRCM EAMKGVRSML QCMADKANAR NM LQQASLV RPLDNQETLD FSRLSLVEQH ECLASILHAA VQRHHATIAD FQDFIKILRK WDKYDHFLIH LIPVLAAYIT EFG SPEGMG DLQQARRLND FICKGGDEDS WALPVLGAAV RAWWIAEHNG FYLDDTVQDL RGINLDEEDE QRTKQFLDAL KEGA FDFIL SVAADCKAQE WQDPSQLGAR QWLQRKIPSL PSEPFPFSHF LQHSLMVHLE GFVDATISNL PDVLRKLRTE EDEQR QLRP NHEQDMDLER FLIIISYAYE GRPDAAMSFW EDPDSNLAGF LQWASRRAST PLVSAFCEML RCLADNEECA TAAHNF LLD EGHQASGKMK RSQSLTWSQI FKELEYFTTK VCSERPNPPQ ASMHRPGRPG ADPAEIEPES ALMLECYLRL IAKLATE SE IARKRLIMDE DFNLVDTILK LSVGVIPHRL RACIFYVLKA LMIRKTHEEL DAMWRWVEAW MTNPFSSLPG SQGAPQRI S FLGQTPGPQE CMEMMFREFG TGFEQSNAFI QLLTTLLVPP EGLNSLNDSV PFPEWLGSSI RTLGIEPYVD FVFDVFANR TKDISDPSQL RILRLSCLDF VMVCLVTFNE DLIVLGHESN ISIDDAMAAT NLATYVRLHP FSRVMEWLFN EKVITSLINT IHQDPISLG SASPDSPLVV SILRAIQVMI KALELQETYL HLVRPEVLRY QGEAGVRRKP VANAAYSAFE DGILSHLSLV V DLGKYCNL GHAELTLACL KLLEKISTSS RILSAWSPDS GRLGHRNKAI VQLERNGEGE TISASLSASI MATLDPALAA SG ENYRVKL AILDFLYACL RATPDQPTIA HQLLGFHCEL SKLGIEPKGP FDMQKSLFHS LLNVLITLTV SEEEQGMRGY LVT LKYRVL RILQLLWKSP LSASLVMDEL RATNFLFHML LREVQIQPQL PWDGQLVTGC EFLLSDASLA YIDYLASRAA IFEY IGKEL CSVSQNRIPS IKRQIFDALN GQIFVDEEAP LTIPSIFDFF DFINTDYKWE EIPSPHFTYL KDLDLGPCIL EHKYA GVHY DIRKAQEILA LKRKEYEHSQ LATPEFLETV ELEEKVLIEW LTVRNRANLL LTARLNLLQA WANLLLVMIE SNDFKS TPK MAFLLQALQA ILPTLEAFSS LKSDEAFELA RVAKVLLWKL DFSQDSDAGL DREQFTVGNL IGDKLFQLFQ LCLSAIS QC SGTPELRSLY YSICYRYLTA VVDNDATVAA TPASSTIGPT RSVTNARART LKAITLYGDR LLNVICDDAY GSDTTCQT A AMILLNALVH TSRASSAAGV SPADVDCPII DALNRLNFIG VLVDSLKEIL NEWLAPSSTF DPSLSTNASP SLPIPASPS QQYTSAKLAL LLQLCQTRQG AKYVLQANLF RALEQSGVFA ADPELVEVDS ESGVPRVVAL ERHYALLVAL ARVVGAAVTA RGAHNIVQG RKFLTQHRGL VVHVLKKNAG IGGGVVGNSL ASSINGGSTA TMTRRDEILA QQALEERIEE LAEAFMLLIT A TGFLEYES EQVPSEQPRA HTTFFH UniProtKB: Nucleoporin NUP192 |
-Macromolecule #2: Nucleoporin NIC96
Macromolecule | Name: Nucleoporin NIC96 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() Strain: DSM 1495 / CBS 144.50 / IMI 039719 |
Molecular weight | Theoretical: 7.173938 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: SGTGLGEVDV DTYLSNLQTK TTLSMIADGL ERSARDFDAF LEENVTLEWE AQRKRIYQHF GIK UniProtKB: Nucleoporin NIC96 |
-Macromolecule #3: Nucleoporin NUP53
Macromolecule | Name: Nucleoporin NUP53 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() Strain: DSM 1495 / CBS 144.50 / IMI 039719 |
Molecular weight | Theoretical: 4.173613 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: SQQDGSLRSR KANLETGAFG KSTRRTRSKA ATPAKRED UniProtKB: Nucleoporin NUP53 |
-Macromolecule #4: Nucleoporin NUP145N
Macromolecule | Name: Nucleoporin NUP145N / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() Strain: DSM 1495 / CBS 144.50 / IMI 039719 |
Molecular weight | Theoretical: 7.077983 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: SATPLSGKAK VKSRSILPMY KLSPANASRL VTTPQKRAYG FSFSAYGSPT SPSSSASSTP GAFGQSILS UniProtKB: Nucleoporin NUP145 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Concentration | 0.5 mg/mL | ||||||||||||
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Buffer | pH: 8 Component:
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Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Specialist optics | Energy filter - Name: GIF Quantum LS |
Image recording | Film or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 4319 / Average electron dose: 100.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 105000 |
Sample stage | Cooling holder cryogen: NITROGEN |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: OTHER |
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Output model | ![]() PDB-7mvv: |
-Atomic model buiding 2
Refinement | Space: REAL / Protocol: OTHER |
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Output model | ![]() PDB-7mvv: |