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- EMDB-21067: Structures of GCP2 and GCP3 in the native human gamma-tubulin rin... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-21067 | |||||||||
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Title | Structures of GCP2 and GCP3 in the native human gamma-tubulin ring complex | |||||||||
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![]() | GCP / GCP2 / GCP3 / gamma-TuSC / gTuSC / gamma-tubulin ring complex / gTuRC / g-TuRC / microtubule / microtubule nucleation / single particle cryo-EM structure / STRUCTURAL PROTEIN | |||||||||
Function / homology | ![]() equatorial microtubule organizing center / polar microtubule / gamma-tubulin complex / microtubule nucleation / gamma-tubulin binding / microtubule organizing center / cytoplasmic microtubule / single fertilization / spindle assembly / meiotic cell cycle ...equatorial microtubule organizing center / polar microtubule / gamma-tubulin complex / microtubule nucleation / gamma-tubulin binding / microtubule organizing center / cytoplasmic microtubule / single fertilization / spindle assembly / meiotic cell cycle / cytoplasmic microtubule organization / Recruitment of mitotic centrosome proteins and complexes / Recruitment of NuMA to mitotic centrosomes / centriole / neuron migration / brain development / structural constituent of cytoskeleton / spindle pole / spindle / mitotic cell cycle / protein-containing complex assembly / centrosome / structural molecule activity / nucleoplasm / membrane / cytoplasm / cytosol Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
![]() | Wieczorek M / Urnavicius L | |||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Asymmetric Molecular Architecture of the Human γ-Tubulin Ring Complex. Authors: Michal Wieczorek / Linas Urnavicius / Shih-Chieh Ti / Kelly R Molloy / Brian T Chait / Tarun M Kapoor / ![]() Abstract: The γ-tubulin ring complex (γ-TuRC) is an essential regulator of centrosomal and acentrosomal microtubule formation, yet its structure is not known. Here, we present a cryo-EM reconstruction of the ...The γ-tubulin ring complex (γ-TuRC) is an essential regulator of centrosomal and acentrosomal microtubule formation, yet its structure is not known. Here, we present a cryo-EM reconstruction of the native human γ-TuRC at ∼3.8 Å resolution, revealing an asymmetric, cone-shaped structure. Pseudo-atomic models indicate that GCP4, GCP5, and GCP6 form distinct Y-shaped assemblies that structurally mimic GCP2/GCP3 subcomplexes distal to the γ-TuRC "seam." We also identify an unanticipated structural bridge that includes an actin-like protein and spans the γ-TuRC lumen. Despite its asymmetric architecture, the γ-TuRC arranges γ-tubulins into a helical geometry poised to nucleate microtubules. Diversity in the γ-TuRC subunits introduces large (>100,000 Å) surfaces in the complex that allow for interactions with different regulatory factors. The observed compositional complexity of the γ-TuRC could self-regulate its assembly into a cone-shaped structure to control microtubule formation across diverse contexts, e.g., within biological condensates or alongside existing filaments. | |||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 6.7 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.5 KB 11.5 KB | Display Display | ![]() |
Images | ![]() | 41.4 KB | ||
Filedesc metadata | ![]() | 5.9 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 6v6bMC ![]() 6v5vC ![]() 6v69C ![]() 6v6cC ![]() 6v6sC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Map
File | ![]() | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Voxel size | X=Y=Z: 1.335 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : Native human gamma-tubulin ring complex
Entire | Name: Native human gamma-tubulin ring complex |
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Components |
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-Supramolecule #1: Native human gamma-tubulin ring complex
Supramolecule | Name: Native human gamma-tubulin ring complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Gamma-tubulin complex component 3
Macromolecule | Name: Gamma-tubulin complex component 3 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 103.710102 KDa |
Sequence | String: MATPDQKSPN VLLQNLCCRI LGRSEADVAQ QFQYAVRVIG SNFAPTVERD EFLVAEKIKK ELIRQRREAD AALFSELHRK LHSQGVLKN KWSILYLLLS LSEDPRRQPS KVSSYATLFA QALPRDAHST PYYYARPQTL PLSYQDRSAQ SAQSSGSVGS S GISSIGLC ...String: MATPDQKSPN VLLQNLCCRI LGRSEADVAQ QFQYAVRVIG SNFAPTVERD EFLVAEKIKK ELIRQRREAD AALFSELHRK LHSQGVLKN KWSILYLLLS LSEDPRRQPS KVSSYATLFA QALPRDAHST PYYYARPQTL PLSYQDRSAQ SAQSSGSVGS S GISSIGLC ALSGPAPAPQ SLLPGQSNQA PGVGDCLRQQ LGSRLAWTLT ANQPSSQATT SKGVPSAVSR NMTRSRREGD TG GTMEITE AALVRDILYV FQGIDGKNIK MNNTENCYKV EGKANLSRSL RDTAVRLSEL GWLHNKIRRY TDQRSLDRSF GLV GQSFCA ALHQELREYY RLLSVLHSQL QLEDDQGVNL GLESSLTLRR LLVWTYDPKI RLKTLAALVD HCQGRKGGEL ASAV HAYTK TGDPYMRSLV QHILSLVSHP VLSFLYRWIY DGELEDTYHE FFVASDPTVK TDRLWHDKYT LRKSMIPSFM TMDQS RKVL LIGKSINFLH QVCHDQTPTT KMIAVTKSAE SPQDAADLFT DLENAFQGKI DAAYFETSKY LLDVLNKKYS LLDHMQ AMR RYLLLGQGDF IRHLMDLLKP ELVRPATTLY QHNLTGILET AVRATNAQFD SPEILRRLDV RLLEVSPGDT GWDVFSL DY HVDGPIATVF TRECMSHYLR VFNFLWRAKR MEYILTDIRK GHMCNAKLLR NMPEFSGVLH QCHILASEMV HFIHQMQY Y ITFEVLECSW DELWNKVQQA QDLDHIIAAH EVFLDTIISR CLLDSDSRAL LNQLRAVFDQ IIELQNAQDA IYRAALEEL QRRLQFEEKK KQREIEGQWG VTAAEEEEEN KRIGEFKESI PKMCSQLRIL THFYQGIVQQ FLVLLTTSSD ESLRFLSFRL DFNEHYKAR EPRLRVSLGT RGRRSSHT UniProtKB: Gamma-tubulin complex component 3 |
-Macromolecule #2: Gamma-tubulin complex component 2
Macromolecule | Name: Gamma-tubulin complex component 2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 105.765719 KDa |
Sequence | String: MSEFRIHHDV NELLSLLRVH GGDGAEVYID LLQKNRTPYV TTTVSAHSAK VKIAEFSRTP EDFLKKYDEL KSKNTRNLDP LVYLLSKLT EDKETLQYLQ QNAKERAELA AAAVGSSTTS INVPAAASKI SMQELEELRK QLGSVATGST LQQSLELKRK M LRDKQNKK ...String: MSEFRIHHDV NELLSLLRVH GGDGAEVYID LLQKNRTPYV TTTVSAHSAK VKIAEFSRTP EDFLKKYDEL KSKNTRNLDP LVYLLSKLT EDKETLQYLQ QNAKERAELA AAAVGSSTTS INVPAAASKI SMQELEELRK QLGSVATGST LQQSLELKRK M LRDKQNKK NSGQHLPIFP AWVYERPALI GDFLIGAGIS TDTALPIVLL RWNLALSPRL KCSGVISAHC NLHLPGTLPL AS QESAVVE DLLYVLVGVD GRYVSAQPLA GRQSRTFLVD PNLDLSIREL VHRILPVAAS YSAVTRFIEE KSSFEYGQVN HAL AAAMRT LVKEHLILVS QLEQLHRQGL LSLQKLWFYI QPAMRTMDIL ASLATSVDKG ECLGGSTLSL LHDRSFSYTG DSQA QELCL YLTKAASAPY FEVLEKWIYR GIIHDPYSEF MVEEHELRKE RIQEDYNDKY WDQRYTIVQQ QIPSFLQKMA DKILS TGKY LNVVRECGHD VTCPVAKEII YTLKERAYVE QIEKAFNYAS KVLLDFLMEE KELVAHLRSI KRYFLMDQGD FFVHFM DLA EEELRKPVED ITPPRLEALL ELALRMSTAN TDPFKDDLKI DLMPHDLITQ LLRVLAIETK QEKAMAHADP TELALSG LE AFSFDYIVKW PLSLIINRKA LTRYQMLFRH MFYCKHVERQ LCSVWISNKT AKQHSLHSAQ WFAGAFTLRQ RMLNFVQN I QYYMMFEVME PTWHILEKNL KSASNIDDVL GHHTGFLDTC LKDCMLTNPE LLKVFSKLMS VCVMFTNCMQ KFTQSMKLD GELGGQTLEH STVLGLPAGA EERARKELAR KHLAEHADTV QLVSGFEATI NKFDKNFSAH LLDLLARLSI YSTSDCEHGM ASVISRLDF NGFYTERLER LSAERSQKAT PQVPVLRGPP APAPRVAVTA Q UniProtKB: Gamma-tubulin complex component 2 |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 45.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Startup model | Type of model: OTHER / Details: Relion 3.0 initial model generation |
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Final reconstruction | Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 351714 |
Initial angle assignment | Type: OTHER / Details: Relion 3.0 |
Final angle assignment | Type: OTHER / Details: Relion 3.0 |