6W3J

Crystal structure of the FAM46C/Plk4/Cep192 complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.38 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.268 

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This is version 1.2 of the entry. See complete history. 


Literature

Structural and Functional Analyses of the FAM46C/Plk4 Complex.

Chen, H., Lu, D., Shang, G., Gao, G., Zhang, X.

(2020) Structure 28: 910-921.e4

  • DOI: 10.1016/j.str.2020.04.023
  • Primary Citation of Related Structures:  
    6W3J, 6W3I, 6W36, 6W38

  • PubMed Abstract: 

    • FAM46C, a non-canonical poly(A) polymerase, is frequently mutated in multiple myeloma. Loss of function of FAM46C promotes cell survival of multiple myeloma, suggesting a tumor-suppressive role. FAM46C is also essential for fastening sperm head and flage ...

    FAM46C, a non-canonical poly(A) polymerase, is frequently mutated in multiple myeloma. Loss of function of FAM46C promotes cell survival of multiple myeloma, suggesting a tumor-suppressive role. FAM46C is also essential for fastening sperm head and flagellum, indispensable for male fertility. The molecular mechanisms of these functions of FAM46C remain elusive. We report the crystal structure of FAM46C to provide the basis for its poly(A) polymerase activity and rationalize mutations associated with multiple myeloma. In addition, we found that FAM46C interacts directly with the serine/threonine kinase Plk4, the master regulator of centrosome duplication. We present the structure of FAM46C in complex with the Cryptic Polo-Box 1-2 domains of Plk4. Our structure-based mutational analyses show that the interaction with Plk4 recruits FAM46C to centrosomes. Our data suggest that Plk4-mediated localization of FAM46C enables its regulation of centrosome structure and functions, which may underlie the roles for FAM46C in cell proliferation and sperm development.

    Organizational Affiliation: 

    Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA; Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. Electronic address: xuewu.zhang@utsouthwestern.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Terminal nucleotidyltransferase 5C A347Homo sapiensMutation(s): 0 
Gene Names: TENT5C, FAM46C
EC: 2.7.7.19
Find proteins for Q5VWP2 (Homo sapiens)
Explore Q5VWP2 
Go to UniProtKB:  Q5VWP2
NIH Common Fund Data Resources
PHAROS:  Q5VWP2
GTEx:  ENSG00000183508
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Serine/threonine-protein kinase PLK4 B223Homo sapiensMutation(s): 0 
Gene Names: PLK4, SAK, STK18
EC: 2.7.11.21
Find proteins for O00444 (Homo sapiens)
Explore O00444 
Go to UniProtKB:  O00444
NIH Common Fund Data Resources
PHAROS:  O00444
GTEx:  ENSG00000142731
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Centrosomal protein of 192 kDa C22Homo sapiensMutation(s): 0 
Gene Names: CEP192, KIAA1569, PP8407
Find proteins for Q8TEP8 (Homo sapiens)
Explore Q8TEP8 
Go to UniProtKB:  Q8TEP8
NIH Common Fund Data Resources
PHAROS:  Q8TEP8
GTEx:  ENSG00000101639
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.38 Å
  • R-Value Free: 0.314 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.268 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.033α = 90
b = 161.449β = 90
c = 167.471γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Cancer Institute (NIH/NCI)United States1R01CA220283
Robert A. Welch FoundationUnited Statesi-1702

Revision History 

  • Version 1.0: 2020-05-06
    Type: Initial release
  • Version 1.1: 2020-06-03
    Changes: Database references
  • Version 1.2: 2020-08-19
    Changes: Database references