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- EMDB-18181: Early closed conformation of the g-tubulin ring complex -

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Basic information

Entry
Database: EMDB / ID: EMD-18181
TitleEarly closed conformation of the g-tubulin ring complex
Map dataRefined map of the early closed gTuRC-MT conformation
Sample
  • Complex: gamma-tubulin ring complex
    • Protein or peptide: Gamma-tubulin complex component 5
    • Protein or peptide: Gamma-tubulin complex component 4
    • Protein or peptide: Gamma-tubulin complex component 3
    • Protein or peptide: Tubulin gamma-1 chain
    • Protein or peptide: Gamma-tubulin complex component 6
  • Protein or peptide: Gamma-tubulin complex component 2
KeywordsMicrotubule / cytoskeleton / g-tubulin ring complex / tubulin / STRUCTURAL PROTEIN
Function / homology
Function and homology information


equatorial microtubule organizing center / gamma-tubulin ring complex / polar microtubule / gamma-tubulin complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation / gamma-tubulin binding / non-motile cilium / microtubule organizing center ...equatorial microtubule organizing center / gamma-tubulin ring complex / polar microtubule / gamma-tubulin complex / mitotic spindle microtubule / meiotic spindle organization / microtubule nucleation / gamma-tubulin binding / non-motile cilium / microtubule organizing center / pericentriolar material / cytoplasmic microtubule / cell leading edge / mitotic sister chromatid segregation / single fertilization / spindle assembly / cytoplasmic microtubule organization / Loss of Nlp from mitotic centrosomes / Loss of proteins required for interphase microtubule organization from the centrosome / Recruitment of mitotic centrosome proteins and complexes / Recruitment of NuMA to mitotic centrosomes / Anchoring of the basal body to the plasma membrane / centriole / AURKA Activation by TPX2 / mitotic spindle organization / ciliary basal body / condensed nuclear chromosome / meiotic cell cycle / neuron migration / brain development / recycling endosome / structural constituent of cytoskeleton / microtubule cytoskeleton organization / spindle pole / spindle / microtubule cytoskeleton / Regulation of PLK1 Activity at G2/M Transition / apical part of cell / mitotic cell cycle / protein-containing complex assembly / microtubule binding / microtubule / neuron projection / centrosome / GTP binding / structural molecule activity / nucleoplasm / identical protein binding / membrane / nucleus / cytosol / cytoplasm
Similarity search - Function
Gamma-tubulin complex component 6, N-terminal / Gamma-tubulin complex component 6 N-terminus / Gamma tubulin / Gamma tubulin complex component, C-terminal / Gamma-tubulin complex component, C-terminal domain superfamily / Gamma tubulin complex component C-terminal / Gamma-tubulin complex component protein / Gamma tubulin complex component protein, N-terminal / Gamma tubulin complex component N-terminal / Tubulin ...Gamma-tubulin complex component 6, N-terminal / Gamma-tubulin complex component 6 N-terminus / Gamma tubulin / Gamma tubulin complex component, C-terminal / Gamma-tubulin complex component, C-terminal domain superfamily / Gamma tubulin complex component C-terminal / Gamma-tubulin complex component protein / Gamma tubulin complex component protein, N-terminal / Gamma tubulin complex component N-terminal / Tubulin / Tubulin, C-terminal / Tubulin C-terminal domain / Tubulin, conserved site / Tubulin subunits alpha, beta, and gamma signature. / Tubulin/FtsZ family, C-terminal domain / Tubulin/FtsZ-like, C-terminal domain / Tubulin/FtsZ, C-terminal / Tubulin/FtsZ, 2-layer sandwich domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ family, GTPase domain / Tubulin/FtsZ, GTPase domain / Tubulin/FtsZ, GTPase domain superfamily
Similarity search - Domain/homology
Tubulin gamma-1 chain / Gamma-tubulin complex component 3 / Gamma-tubulin complex component 6 / Gamma-tubulin complex component 5 / Gamma-tubulin complex component 2 / Gamma-tubulin complex component 4
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.72 Å
AuthorsLlorca O / Serna M / Fernandez-Leiro R
Funding support Spain, European Union, 2 items
OrganizationGrant numberCountry
Agencia Estatal de Investigacion (AEI)AEI/10.13039/501100011 003 Spain
European Regional Development FundPID2020-114429RB-I00European Union
CitationJournal: Science / Year: 2024
Title: Transition of human γ-tubulin ring complex into a closed conformation during microtubule nucleation.
Authors: Cláudia Brito / Marina Serna / Pablo Guerra / Oscar Llorca / Thomas Surrey /
Abstract: Microtubules are essential for intracellular organization and chromosome segregation. They are nucleated by the γ-tubulin ring complex (γTuRC). However, isolated vertebrate γTuRC adopts an open ...Microtubules are essential for intracellular organization and chromosome segregation. They are nucleated by the γ-tubulin ring complex (γTuRC). However, isolated vertebrate γTuRC adopts an open conformation that deviates from the microtubule structure, raising the question of the nucleation mechanism. In this study, we determined cryo-electron microscopy structures of human γTuRC bound to a nascent microtubule. Structural changes of the complex into a closed conformation ensure that γTuRC templates the 13-protofilament microtubules that exist in human cells. Closure is mediated by a latch that interacts with incorporating tubulin, making it part of the closing mechanism. Further rearrangements involve all γTuRC subunits and the removal of the actin-containing luminal bridge. Our proposed mechanism of microtubule nucleation by human γTuRC relies on large-scale structural changes that are likely the target of regulation in cells.
History
DepositionAug 10, 2023-
Header (metadata) releaseFeb 7, 2024-
Map releaseFeb 7, 2024-
UpdateMar 6, 2024-
Current statusMar 6, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_18181.png

Downloads & links

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Map

FileDownload / File: emd_18181.map.gz / Format: CCP4 / Size: 303.3 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationRefined map of the early closed gTuRC-MT conformation
Projections & slices

Image control

Size
Brightness
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Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.37 Å/pix.
x 430 pix.
= 588.042 Å		1.37 Å/pix.
x 430 pix.
= 588.042 Å		1.37 Å/pix.
x 430 pix.
= 588.042 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.36754 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.006
Minimum - Maximum-0.0103850905 - 0.03192203
Average (Standard dev.)0.00004198338 (±0.0012347979)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions430430430
Spacing430430430
CellA=B=C: 588.0422 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_18181_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Refined and sharpened map of the early closed gTuRC-MT conformation

Fileemd_18181_additional_1.map
AnnotationRefined and sharpened map of the early closed gTuRC-MT conformation
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Refined and sharpened map of the early closed...

Fileemd_18181_additional_2.map
AnnotationRefined and sharpened map of the early closed gTuRC-MT conformation, focusing on the luminal bridge
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Refined and sharpened map of the early closed...

Fileemd_18181_additional_3.map
AnnotationRefined and sharpened map of the early closed gTuRC-MT conformation, focusing on positions 3 to 11.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: CryoDRGN volume 6

Fileemd_18181_additional_4.map
AnnotationCryoDRGN volume 6
Projections & Slices
AxesZYX

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Histogram

Histogram (log scale)

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Additional map: CryoDRGN volume 5

Fileemd_18181_additional_5.map
AnnotationCryoDRGN volume 5
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: CryoDRGN volume 3

Fileemd_18181_additional_6.map
AnnotationCryoDRGN volume 3
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: CryoDRGN volume 1

Fileemd_18181_additional_7.map
AnnotationCryoDRGN volume 1
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 1 of the refined map of...

Fileemd_18181_half_map_1.map
AnnotationHalf map 1 of the refined map of the early closed gTuRC-MT conformation
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 2 of the refined map of...

Fileemd_18181_half_map_2.map
AnnotationHalf map 2 of the refined map of the early closed gTuRC-MT conformation
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : gamma-tubulin ring complex

EntireName: gamma-tubulin ring complex
Components
  • Complex: gamma-tubulin ring complex
    • Protein or peptide: Gamma-tubulin complex component 5
    • Protein or peptide: Gamma-tubulin complex component 4
    • Protein or peptide: Gamma-tubulin complex component 3
    • Protein or peptide: Tubulin gamma-1 chain
    • Protein or peptide: Gamma-tubulin complex component 6
  • Protein or peptide: Gamma-tubulin complex component 2

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Supramolecule #1: gamma-tubulin ring complex

SupramoleculeName: gamma-tubulin ring complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #2-#4, #1, #6
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Tubulin gamma-1 chain

MacromoleculeName: Tubulin gamma-1 chain / type: protein_or_peptide / ID: 1 / Number of copies: 14 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 51.22777 KDa
SequenceString: MPREIITLQL GQCGNQIGFE FWKQLCAEHG ISPEGIVEEF ATEGTDRKDV FFYQADDEHY IPRAVLLDLE PRVIHSILNS PYAKLYNPE NIYLSEHGGG AGNNWASGFS QGEKIHEDIF DIIDREADGS DSLEGFVLCH SIAGGTGSGL GSYLLERLND R YPKKLVQT ...String:
MPREIITLQL GQCGNQIGFE FWKQLCAEHG ISPEGIVEEF ATEGTDRKDV FFYQADDEHY IPRAVLLDLE PRVIHSILNS PYAKLYNPE NIYLSEHGGG AGNNWASGFS QGEKIHEDIF DIIDREADGS DSLEGFVLCH SIAGGTGSGL GSYLLERLND R YPKKLVQT YSVFPNQDEM SDVVVQPYNS LLTLKRLTQN ADCVVVLDNT ALNRIATDRL HIQNPSFSQI NQLVSTIMSA ST TTLRYPG YMNNDLIGLI ASLIPTPRLH FLMTGYTPLT TDQSVASVRK TTVLDVMRRL LQPKNVMVST GRDRQTNHCY IAI LNIIQG EVDPTQVHKS LQRIRERKLA NFIPWGPASI QVALSRKSPY LPSAHRVSGL MMANHTSISS LFERTCRQYD KLRK REAFL EQFRKEDMFK DNFDEMDTSR EIVQQLIDEY HAATRPDYIS WGTQEQ

UniProtKB: Tubulin gamma-1 chain

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Macromolecule #2: Gamma-tubulin complex component 5

MacromoleculeName: Gamma-tubulin complex component 5 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 118.467547 KDa
SequenceString: MARHGPPWSR LDAQQERDVR ELVRGVAGLQ DEADPNFQLA LNFAWSNFRF HRFLDVNSHK IEKTIEGIYE KFVIHSDLSK AASWKRLTE EFLNAPLPSI KEIKTDAHYS ILSLLLCLSD SPSNSSYVET PRNKEVEKKD DFDWGKYLME DEEMDIGPYM D TPNWSEES ...String:
MARHGPPWSR LDAQQERDVR ELVRGVAGLQ DEADPNFQLA LNFAWSNFRF HRFLDVNSHK IEKTIEGIYE KFVIHSDLSK AASWKRLTE EFLNAPLPSI KEIKTDAHYS ILSLLLCLSD SPSNSSYVET PRNKEVEKKD DFDWGKYLME DEEMDIGPYM D TPNWSEES EEENDQQPLS REDSGIQVDR TPLEEQDQNR KLDPCISWKD EPDDRSWLEH HVVHQYWTAR PSQFPHSLHL HS NLAAVWD QHLYSSDPLY VPDDRVLVTE TQVIRETLWL LSGVKKLFIF QLIDGKVTVR NNIIVTHLTH SCLRSVLEQI AAY GQVVFR LQEFIDEVMG HSSESMLPGS GSVPKKSTEA PFRTYQAFMW ALYKYFISFK EELAEIEKCI INNDTTITLA IVVD KLAPR LSQLKVLHKV FSTGVAEVPP DTRNVVRASH LLNTLYKAIL EYDNVGEASE QTVSLLFSLW VETVRPYLQT VDEWI VHGH LWDGAREFII QRNKNVPVNH RDFWYATYTL YSVSEKTENE EKMSDNASAS SGSDQGPSSR QHTMVSFLKP VLKQII MAG KSMQLLKNLQ CAESTTCQAG ARDAERKSLY TLFLESVQSR LRHGEDSTPQ VLTEQQATKE NLMKMQSIAE SHLELDD VH DPLLAINFAR MYLEQSDFHE KFAGGDVCVD RSSESVTCQT FELTLRSCLY PHIDKQYLDC CGNLMQTLKK DYRLVEYL Q AMRNFFLMEG GDTMYDFYTS IFDKIREKET WQNVSFLNVQ LQEAVGQRYP EDSSRLSISF ENVDTAKKKL PVHILDGLT LSYKVPWPVD IVISLECQKI YNQVFLLLLQ IKWAKYSLDV LLFGELVSTA EKPRLKEGLI HEQDTVAQFG PQKEPVRQQI HRMFLLRVK LMHFVNSLHN YIMTRILHST GLEFQHQVEE AKDLDQLIKI HYRYLSTIHD RCLLREKVSF VKEAIMKVLN L ALMFADGW QAGLGTWRME SIEKMESDFK NCHMFLVTIL NKAVCRGSFP HLESLALSLM AGMEQS

UniProtKB: Gamma-tubulin complex component 5

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Macromolecule #3: Gamma-tubulin complex component 4

MacromoleculeName: Gamma-tubulin complex component 4 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 76.179969 KDa
SequenceString: MIHELLLALS GYPGSIFTWN KRSGLQVSQD FPFLHPSETS VLNRLCRLGT DYIRFTEFIE QYTGHVQQQD HHPSQQGQGG LHGIYLRAF CTGLDSVLQP YRQALLDLEQ EFLGDPHLSI SHVNYFLDQF QLLFPSVMVV VEQIKSQKIH GCQILETVYK H SCGGLPPV ...String:
MIHELLLALS GYPGSIFTWN KRSGLQVSQD FPFLHPSETS VLNRLCRLGT DYIRFTEFIE QYTGHVQQQD HHPSQQGQGG LHGIYLRAF CTGLDSVLQP YRQALLDLEQ EFLGDPHLSI SHVNYFLDQF QLLFPSVMVV VEQIKSQKIH GCQILETVYK H SCGGLPPV RSALEKILAV CHGVMYKQLS AWMLHGLLLD QHEEFFIKQG PSSGNVSAQP EEDEEDLGIG GLTGKQLREL QD LRLIEEE NMLAPSLKQF SLRVEILPSY IPVRVAEKIL FVGESVQMFE NQNVNLTRKG SILKNQEDTF AAELHRLKQQ PLF SLVDFE QVVDRIRSTV AEHLWKLMVE ESDLLGQLKI IKDFYLLGRG ELFQAFIDTA QHMLKTPPTA VTEHDVNVAF QQSA HKVLL DDDNLLPLLH LTIEYHGKEH KADATQAREG PSRETSPREA PASGWAALGL SYKVQWPLHI LFTPAVLEKY NVVFK YLLS VRRVQAELQH CWALQMQRKH LKSNQTDAIK WRLRNHMAFL VDNLQYYLQV DVLESQFSQL LHQINSTRDF ESIRLA HDH FLSNLLAQSF ILLKPVFHCL NEILDLCHSF CSLVSQNLGP LDERGAAQLS ILVKGFSRQS SLLFKILSSV RNHQINS DL AQLLLRLDYN KYYTQAGGTL GSFGM

UniProtKB: Gamma-tubulin complex component 4

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Macromolecule #4: Gamma-tubulin complex component 3

MacromoleculeName: Gamma-tubulin complex component 3 / type: protein_or_peptide / ID: 4 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 103.710102 KDa
SequenceString: 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

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Macromolecule #5: Gamma-tubulin complex component 2

MacromoleculeName: Gamma-tubulin complex component 2 / type: protein_or_peptide / ID: 5 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 102.666953 KDa
SequenceString: 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 TDTALPIGTL PLASQESAVV EDLLYVLVGV DGRYVSAQPL AG RQSRTFL VDPNLDLSIR ELVHRILPVA ASYSAVTRFI EEKSSFEYGQ VNHALAAAMR TLVKEHLILV SQLEQLHRQG LLS LQKLWF YIQPAMRTMD ILASLATSVD KGECLGGSTL SLLHDRSFSY TGDSQAQELC LYLTKAASAP YFEVLEKWIY RGII HDPYS EFMVEEHELR KERIQEDYND KYWDQRYTIV QQQIPSFLQK MADKILSTGK YLNVVRECGH DVTCPVAKEI IYTLK ERAY VEQIEKAFNY ASKVLLDFLM EEKELVAHLR SIKRYFLMDQ GDFFVHFMDL AEEELRKPVE DITPPRLEAL LELALR MST ANTDPFKDDL KIDLMPHDLI TQLLRVLAIE TKQEKAMAHA DPTELALSGL EAFSFDYIVK WPLSLIINRK ALTRYQM LF RHMFYCKHVE RQLCSVWISN KTAKQHSLHS AQWFAGAFTL RQRMLNFVQN IQYYMMFEVM EPTWHILEKN LKSASNID D VLGHHTGFLD TCLKDCMLTN PELLKVFSKL MSVCVMFTNC MQKFTQSMKL DGELGGQTLE HSTVLGLPAG AEERARKEL ARKHLAEHAD TVQLVSGFEA TINKFDKNFS AHLLDLLARL SIYSTSDCEH GMASVISRLD FNGFYTERLE RLSAERSQKA TPQVPVLRG PPAPAPRVAV TAQ

UniProtKB: Gamma-tubulin complex component 2

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Macromolecule #6: Gamma-tubulin complex component 6

MacromoleculeName: Gamma-tubulin complex component 6 / type: protein_or_peptide / ID: 6 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 200.733641 KDa
SequenceString: MASITQLFDD LCEALLPAAK THLGQRSVNR KRAKRSLKKV AYNALFTNLF QDETQQLQPD MSKLPARNKI LMLSFDLRVG GLGPKADRL EELVEELEAA PCCPLLEVGS VLDLLVQLAG SGPPQVLPRK RDYFLNNKHV GRNVPYSGYD CDDLSVFEMD V QSLISREE ...String:
MASITQLFDD LCEALLPAAK THLGQRSVNR KRAKRSLKKV AYNALFTNLF QDETQQLQPD MSKLPARNKI LMLSFDLRVG GLGPKADRL EELVEELEAA PCCPLLEVGS VLDLLVQLAG SGPPQVLPRK RDYFLNNKHV GRNVPYSGYD CDDLSVFEMD V QSLISREE CLCHSMIQET LQVMEAAPGT GLPTVGLFSF GDPCGDRFER DTRVSLFGAL VHSRTYDMDV RLGLPPVPDN AD LSGLAIK VPPSVDQWED EGFQSASNLT PDSQSEPSVT PDVDLWEAAL TYEASKRRCW ERVGCPPGHR EEPYLTEAGR DAF DKFCRL HQGELQLLAG GVLQAPQPVL VKECELVKDV LNVLIGVVSA TFSLCQPAQA FVVKRGVHVS GASPESISSL LSEV AEYGT CYTRLSHFSL QPVLDSLYSK GLVFQAFTSG LRRYLQYYRA CVLSTPPTLS LLTIGFLFKK LGRQLRYLAE LCGVG AVLP GTCGGGPRAA FPTGVKLLSY LYQEALHNCS NEHYPVLLSL LKTSCEPYTR FIHDWVYSGV FRDAYGEFMI QVNHEY LSF RDKLYWTHGY VLISKEVEDC VPVFLKHIAH DIYVCGKTIN LLKLCCPRHY LCWSDVPVPR ISVIFSLEEL KEIEKDC AV YVGRMERVAR HSSVSKEEKE LRMEIAKQEL IAHAREAASR VLSALSDRQM SERMALDARK REQFQRLKEQ FVKDQERR Q AARQEELDDD FSYARELRDR ERRLKSLEEE LERKARQALV DHYSKLSAEA ARREQKALWR IQRHRLESAR LRFLLEDEK HIQEMLKAVS EAHQPQEPPD VLLSVHPQVT SPGPEHPEGG QGCDSGSAEQ HSPAWDGWNR PGLLTPQPLK PLAVGAGGRG LQQAEGARP FSDSLSIGDF LPVGPGAEPS VQTGMVPLLE VALQTINLDL PPSAPGEAPA AASTQPSRPQ EYDFSTVLRP A VATSPAPG PLQAAECSLG SSGLQLWEDS CGKMDACGSA SRETLLPSHP PRRAALEEGS SQPTERLFGQ VSGGGLPTGD YA SEIAPTR PRWNTHGHVS DASIRVGENV SDVAPTQPRW NTHGHVSNAS ISLGESVSDV APTRPRWNIH GHVSNASIRV GEN VSDVAP TRPRWNTHGH VSNASIRVGE NVSDVAPTRP RWNTHGHVSD ASISLGESVS DMAPARPRWN THGHVSDASI SLGE SVSDM APTRPRWNTH GHVSDTSIRV GENVSDVAPI RSRCNTHGHV SDASISLGEP VSDVVSTRPR WNTHVPIPPP HMVLG ALSP EAEPNTPRPQ QSPPGHTSQS ALSLGAQSTV LDCGPRLPVE VGPSLSSPSS GCGEGSISVG ENVSDVAPTQ PWWPNT PGD SVSEELGPGR SGDTEDLSPN WPLNSQEDTA AQSSPGRGEE AEASAAEAQG GEQAYLAGLA GQYHLERYPD SYESMSE PP IAHLLRPVLP RAFAFPVDPQ VQSAADETAV QLSELLTLPV LMKRSITAPL AAHISLVNKA AVDYFFVELH LEAHYEAL R HFLLMEDGEF AQSLSDLLFE KLGAGQTPGE LLNPLVLNSV LSKALQCSLH GDTPHASNLS LALKYLPEVF APNAPDVLS CLELRYKVDW PLNIVITEGC VSKYSGVFSF LLQLKLMMWA LKDVCFHLKR TALLSHMAGS VQFRQLQLFK HEMQHFVKVI QGYIANQIL HVTWCEFRAR LATVGDLEEI QRAHAEYLHK AVFRGLLTEK AAPVMNVIHS IFSLVLKFRS QLISQAWGPP G GPRGAEHP NFALMQQSYN TFKYYSHFLF KVVTKLVNRG YQPHLEDFLL RINFNNYYQD A

UniProtKB: Gamma-tubulin complex component 6

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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: 6.9
GridModel: Quantifoil R2/1 / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 45 sec. / Pretreatment - Atmosphere: AIR / Details: 15 mA
VitrificationCryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 310 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 46276 / Average exposure time: 1.3 sec. / Average electron dose: 46.276 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.0 µm / Nominal magnification: 130000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1580023
Startup modelType of model: INSILICO MODEL / In silico model: CryoSPARC Ab Initio Reconstruction
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.72 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 357509
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: ANGULAR RECONSTITUTION
Final 3D classificationDetails: Several 3D classification and heterogeneity analysis methods
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

7as4

source_name: PDB, initial_model_type: experimental model

6x0u

source_name: PDB, initial_model_type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT
Output model

PDB-8q62:
Early closed conformation of the g-tubulin ring complex

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