8D96

Human DNA polymerase alpha/primase elongation complex I bound to primer/template

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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


Literature

Structures of human primosome elongation complexes.

He, Q., Baranovskiy, A.G., Morstadt, L.M., Lisova, A.E., Babayeva, N.D., Lusk, B.L., Lim, C.J., Tahirov, T.H.

(2023) Nat Struct Mol Biol 30: 579-583

  • DOI: https://doi.org/10.1038/s41594-023-00971-3
  • Primary Citation of Related Structures:  
    8D96, 8D9D

  • PubMed Abstract: 

    The synthesis of RNA-DNA primer by primosome requires coordination between primase and DNA polymerase α subunits, which is accompanied by unknown architectural rearrangements of multiple domains. Using cryogenic electron microscopy, we solved a 3.6 Å human primosome structure caught at an early stage of RNA primer elongation with deoxynucleotides. The structure confirms a long-standing role of primase large subunit and reveals new insights into how primosome is limited to synthesizing short RNA-DNA primers.

    • Organizational Affiliation: 

    Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA.


Macromolecules

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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
DNA primase large subunitA [auth B]509Homo sapiensMutation(s): 0 
Gene Names: PRIM2, PRIM2A
EC: 2.7.7
UniProt & NIH Common Fund Data Resources
Find proteins for P49643 (Homo sapiens)
Explore P49643 
Go to UniProtKB:  P49643
PHAROS:  P49643
GTEx:  ENSG00000146143 
Entity Groups  
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UniProt GroupP49643
Sequence Annotations
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
DNA polymerase alpha catalytic subunitB [auth C]1,462Homo sapiensMutation(s): 0 
Gene Names: POLA1, POLA
EC: 2.7.7.7
UniProt & NIH Common Fund Data Resources
Find proteins for P09884 (Homo sapiens)
Explore P09884 
Go to UniProtKB:  P09884
PHAROS:  P09884
GTEx:  ENSG00000101868 
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UniProt GroupP09884
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Entity ID: 3
MoleculeChains LengthOrganismImage
DNA/RNA (5'-GTP)-R(P*GP*CP*GP*GP*CP*AP*CP*G)-D(P*AP*CP*C)-3')C [auth E]12Homo sapiens
Sequence Annotations
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Entity ID: 4
MoleculeChains LengthOrganismImage
DNA (5'-D(*AP*TP*AP*AP*TP*GP*GP*TP*CP*GP*TP*GP*CP*CP*GP*CP*CP*AP*AP*TP*AP*A)-3')D [auth F]22Homo sapiens
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC
MODEL REFINEMENTPHENIX

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 StatesR00GM131023
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM127085

Revision History  (Full details and data files)

  • Version 1.0: 2023-04-19
    Type: Initial release
  • Version 1.1: 2023-05-03
    Changes: Database references
  • Version 1.2: 2023-05-31
    Changes: Database references