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There are two main types of primase: DnaG found in most bacteria, and the AEP (Archaeo-Eukaryote Primase) superfamily found in archaean and eukaryotic primases. While bacterial primases (DnaG-type) are composed of a single protein unit (a monomer) and synthesize RNA primers, AEP primases are usually composed of two different primase units (a heterodimer) and synthesize two-part primers with ...
19076 Ensembl ENSG00000146143 ENSMUSG00000026134 UniProt P49643 P33610 RefSeq (mRNA) NM_000947 NM_001282487 NM_001282488 NM_008922 RefSeq (protein) NP_000938 NP_001269416 NP_001269417 NP_032948 Location (UCSC) Chr 6: 57.31 – 57.65 Mb Chr 1: 33.49 – 33.71 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse DNA primase large subunit is an enzyme that in humans is encoded by the PRIM2 ...
The E. Coli DnaG primase is a 581 residue monomeric protein with three functional domains, according to proteolysis studies. There is an N-terminal Zinc-binding domain (residues 1–110) where a zinc ion is tetrahedrally coordinated between one histidine and three cysteine residues, which plays a role in recognizing sequence specific DNA binding sites.
19075 Ensembl ENSG00000198056 ENSMUSG00000025395 UniProt P49642 P20664 RefSeq (mRNA) NM_000946 NM_008921 RefSeq (protein) NP_000937 NP_032947 Location (UCSC) Chr 12: 56.73 – 56.75 Mb Chr 10: 127.85 – 127.87 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse DNA primase small subunit is an enzyme that in humans is encoded by the PRIM1 gene. The replication of DNA in eukaryotic cells ...
DNA polymerase alpha, like DNA primase, contains iron-sulfur clusters, that are critical in electron transport that uses DNA itself to transfer electrons at very high speeds; this process is involved in detecting DNA damage, and may also be involved in a feedback between the primase complex and the DNA polymerase alpha.
[5] [6] [7] PrimPol is a eukaryotic protein with both DNA polymerase and DNA Primase activities involved in translesion DNA synthesis. It is the first eukaryotic protein to be identified with priming activity using deoxyribonucleotides. [6] [7] It is also the first protein identified in the mitochondria to have translesion DNA synthesis activities.
The Pol α complex (pol α-DNA primase complex) consists of four subunits: the catalytic subunit POLA1, the regulatory subunit POLA2, and the small and the large primase subunits PRIM1 and PRIM2 respectively. Once primase has created the RNA primer, Pol α starts replication elongating the primer with ~20 nucleotides.
The chemical structure of DNA is insufficient to understand the complexity of the 3D structures of DNA. In contrast, animated molecular models allow one to visually explore the three-dimensional (3D) structure of DNA. The DNA model shown (far right) is a space-filling, or CPK, model of the DNA double helix. Animated molecular models, such as ...