6X0U

Structure of MZT1/GCP3-NHD and MZT1/GCP6-NHD in the gamma-TuRC lumenal bridge

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

MZT Proteins Form Multi-Faceted Structural Modules in the gamma-Tubulin Ring Complex.

Wieczorek, M., Huang, T.L., Urnavicius, L., Hsia, K.C., Kapoor, T.M.

(2020) Cell Rep 31: 107791-107791

  • DOI: 10.1016/j.celrep.2020.107791
  • Primary Citation of Related Structures:  
    6M33, 6X0U, 6X0V

  • PubMed 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 unclear how the γ-TuRC-associated microproteins MZT1 and MZT2 contribute to the structure and regulation of the holocomplex ...

    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.

    Organizational Affiliation: 

    Laboratory of Chemistry and Cell Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA. Electronic address: kapoor@rockefeller.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 3A [auth B]907Homo sapiensMutation(s): 0 
Gene Names: TUBGCP3, GCP3
UniProt & NIH Common Fund Data Resources
Find proteins for Q96CW5 (Homo sapiens)
Explore Q96CW5 
Go to UniProtKB:  Q96CW5
PHAROS:  Q96CW5
GTEx:  ENSG00000126216 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ96CW5
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-tubulin complex component 6B [auth D]1819Homo sapiensMutation(s): 0 
Gene Names: TUBGCP6, GCP6, KIAA1669
UniProt & NIH Common Fund Data Resources
Find proteins for Q96RT7 (Homo sapiens)
Explore Q96RT7 
Go to UniProtKB:  Q96RT7
PHAROS:  Q96RT7
GTEx:  ENSG00000128159 
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UniProt GroupQ96RT7
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Mitotic-spindle organizing protein 1C [auth A],
D [auth C]		82Homo sapiensMutation(s): 0 
Gene Names: MZT1, C13orf37, MOZART1
UniProt & NIH Common Fund Data Resources
Find proteins for Q08AG7 (Homo sapiens)
Explore Q08AG7 
Go to UniProtKB:  Q08AG7
PHAROS:  Q08AG7
GTEx:  ENSG00000204899 
Entity Groups  
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UniProt GroupQ08AG7
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.60 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
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)--

Revision History  (Full details and data files)

  • Version 1.0: 2020-07-22
    Type: Initial release