8d9d

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Human DNA polymerase-alpha/primase elongation complex II bound to primer/templateHuman DNA polymerase-alpha/primase elongation complex II bound to primer/template

Structural highlights

8d9d is a 6 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:Electron Microscopy, Resolution 3.59Å
Ligands:, , , ,
Resources:FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

PRI1_HUMAN DNA primase is the polymerase that synthesizes small RNA primers for the Okazaki fragments made during discontinuous DNA replication.

Publication Abstract from PubMed

The synthesis of RNA-DNA primer by primosome requires coordination between primase and DNA polymerase alpha subunits, which is accompanied by unknown architectural rearrangements of multiple domains. Using cryogenic electron microscopy, we solved a 3.6 A 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.

Structures of human primosome elongation complexes.,He Q, Baranovskiy AG, Morstadt LM, Lisova AE, Babayeva ND, Lusk BL, Lim CJ, Tahirov TH Nat Struct Mol Biol. 2023 May;30(5):579-583. doi: 10.1038/s41594-023-00971-3. , Epub 2023 Apr 17. PMID:37069376[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

See Also

References

  1. He Q, Baranovskiy AG, Morstadt LM, Lisova AE, Babayeva ND, Lusk BL, Lim CJ, Tahirov TH. Structures of human primosome elongation complexes. Nat Struct Mol Biol. 2023 May;30(5):579-583. PMID:37069376 doi:10.1038/s41594-023-00971-3

8d9d, resolution 3.59Å

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