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- EMDB-21984: Structure of MZT1/GCP3-NHD and MZT1/GCP6-NHD in the gamma-TuRC lu... -

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Basic information

Entry
Database: EMDB / ID: EMD-21984
TitleStructure of MZT1/GCP3-NHD and MZT1/GCP6-NHD in the gamma-TuRC lumenal bridge
Map dataFocused refinement %u03B3-TuRC density map corresponding to the lumenal bridge
Sample
  • Complex: gamma-TuRC lumenal bridge
    • Protein or peptide: Gamma-tubulin complex component 3
    • Protein or peptide: Gamma-tubulin complex component 6
    • Protein or peptide: Mitotic-spindle organizing protein 1
Keywordsgamma-TuRC / lumenal bridge / MZT1 / GCP / STRUCTURAL PROTEIN
Function / homology
Function and homology information


microtubule nucleation by interphase microtubule organizing center / gamma-tubulin complex localization / equatorial microtubule organizing center / gamma-tubulin ring complex / microtubule minus-end binding / interphase microtubule organizing center / polar microtubule / gamma-tubulin complex / microtubule nucleation / gamma-tubulin binding ...microtubule nucleation by interphase microtubule organizing center / gamma-tubulin complex localization / equatorial microtubule organizing center / gamma-tubulin ring complex / microtubule minus-end binding / interphase microtubule organizing center / polar microtubule / gamma-tubulin complex / microtubule nucleation / gamma-tubulin binding / mitotic spindle assembly / single fertilization / spindle assembly / cytoplasmic microtubule organization / Recruitment of mitotic centrosome proteins and complexes / Recruitment of NuMA to mitotic centrosomes / centriole / meiotic cell cycle / structural constituent of cytoskeleton / spindle pole / spindle / mitotic cell cycle / microtubule binding / microtubule / centrosome / structural molecule activity / membrane / cytoplasm / cytosol
Similarity search - Function
Mitotic-spindle organizing protein 1 / Mitotic-spindle organizing gamma-tubulin ring associated / Gamma-tubulin complex component 6, N-terminal / Gamma-tubulin complex component 6 N-terminus / 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
Similarity search - Domain/homology
Mitotic-spindle organizing protein 1 / Gamma-tubulin complex component 3 / Gamma-tubulin complex component 6
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.6 Å
AuthorsWieczorek M / Huang T-L
Funding support United States, 4 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
Human Frontier Science Program (HFSP)
Ministry of Science and Technology (MoST, Taiwan)
Academia Sinica (Taiwan)
CitationJournal: Cell Rep / Year: 2020
Title: MZT Proteins Form Multi-Faceted Structural Modules in the γ-Tubulin Ring Complex.
Authors: Michal Wieczorek / Tzu-Lun Huang / Linas Urnavicius / Kuo-Chiang Hsia / Tarun M Kapoor /
Abstract: Microtubule organization depends on the γ-tubulin ring complex (γ-TuRC), a ∼2.3-MDa nucleation factor comprising an asymmetric assembly of γ-tubulin and GCP2-GCP6. However, it is currently ...Microtubule organization depends on the γ-tubulin ring complex (γ-TuRC), a ∼2.3-MDa nucleation factor comprising an asymmetric assembly of γ-tubulin and GCP2-GCP6. However, it is currently unclear how the γ-TuRC-associated microproteins MZT1 and MZT2 contribute to the structure and regulation of the holocomplex. Here, we report cryo-EM structures of MZT1 and MZT2 in the context of the native human γ-TuRC. MZT1 forms two subcomplexes with the N-terminal α-helical domains of GCP3 or GCP6 (GCP-NHDs) within the γ-TuRC "lumenal bridge." We determine the X-ray structure of recombinant MZT1/GCP6-NHD and find it is similar to that within the native γ-TuRC. We identify two additional MZT/GCP-NHD-like subcomplexes, one of which is located on the outer face of the γ-TuRC and comprises MZT2 and GCP2-NHD in complex with a centrosomin motif 1 (CM1)-containing peptide. Our data reveal how MZT1 and MZT2 establish multi-faceted, structurally mimetic "modules" that can expand structural and regulatory interfaces in the γ-TuRC.
History
DepositionMay 17, 2020-
Header (metadata) releaseJul 22, 2020-
Map releaseJul 22, 2020-
UpdateMar 6, 2024-
Current statusMar 6, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.014
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.014
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6x0u
  • Surface level: 0.014
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-6x0u
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_21984.png

Downloads & links

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Map

FileDownload / File: emd_21984.map.gz / Format: CCP4 / Size: 190.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationFocused refinement %u03B3-TuRC density map corresponding to the lumenal bridge
Voxel sizeX=Y=Z: 1.036 Å
Density
Contour LevelBy AUTHOR: 0.014 / Movie #1: 0.014
Minimum - Maximum-0.073785596 - 0.1089483
Average (Standard dev.)0.00019067805 (±0.0022035635)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions368368368
Spacing368368368
CellA=B=C: 381.24802 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0361.0361.036
M x/y/z368368368
origin x/y/z0.0000.0000.000
length x/y/z381.248381.248381.248
α/β/γ90.00090.00090.000
start NX/NY/NZ000
NX/NY/NZ250250250
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS368368368
D min/max/mean-0.0740.1090.000

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Supplemental data

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Sample components

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Entire : gamma-TuRC lumenal bridge

EntireName: gamma-TuRC lumenal bridge
Components
  • Complex: gamma-TuRC lumenal bridge
    • Protein or peptide: Gamma-tubulin complex component 3
    • Protein or peptide: Gamma-tubulin complex component 6
    • Protein or peptide: Mitotic-spindle organizing protein 1

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Supramolecule #1: gamma-TuRC lumenal bridge

SupramoleculeName: gamma-TuRC lumenal bridge / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Gamma-tubulin complex component 3

MacromoleculeName: Gamma-tubulin complex component 3 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / 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 #2: Gamma-tubulin complex component 6

MacromoleculeName: Gamma-tubulin complex component 6 / type: protein_or_peptide / ID: 2 / 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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Macromolecule #3: Mitotic-spindle organizing protein 1

MacromoleculeName: Mitotic-spindle organizing protein 1 / type: protein_or_peptide / ID: 3 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 8.485724 KDa
SequenceString:
MASSSGAGAA AAAAAANLNA VRETMDVLLE ISRILNTGLD METLSICVRL CEQGINPEAL SSVIKELRKA TEALKAAENM TS

UniProtKB: Mitotic-spindle organizing protein 1

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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: 7.5
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: 45.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 419138
Initial angle assignmentType: OTHER
Final angle assignmentType: OTHER

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