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Literature summary for 2.7.7.7 extracted from

  • Eoff, R.L.; Stafford, J.B.; Szekely, J.; Rizzo, C.J.; Egli, M.; Guengerich, F.P.; Marnett, L.J.
    Structural and functional analysis of Sulfolobus solfataricus Y-family DNA polymerase Dpo4-catalyzed bypass of the malondialdehyde-deoxyguanosine adduct (2009), Biochemistry, 48, 7079-7088.
    View publication on PubMedView publication on EuropePMC
Search for more literature for 2.7.7.7

Cloned(Commentary)

Cloned (Comment) Organism
expression in Escherichia coli Saccharolobus solfataricus

Crystallization (Commentary)

Crystallization (Comment) Organism
crystal data and refinement parameters for the ternary (protein/DNA/GTP) complexes of Dpo4, The complexes are crystallized by sitting-drop vapor diffusion Saccharolobus solfataricus

Inhibitors

Inhibitors Comment Organism Structure
3-(2'-deoxy-beta-D-erythro-pentofuranosyl) pyrimido[1,2-alpha]purin-10(3H)-one i.e. M1dG. When paired opposite cytosine in duplex DNA at physiological pH,M1dG undergoes ring opening to form N2-(3-oxo-1-propenyl)-dG. To improve the understanding of the basis for M1dG-induced mutagenesis, the mechanism of translesion DNA synthesis opposite M1dG by the model Y-family polymerase Dpo4 is studied at a molecular level using kinetic and structural approaches. Steady-state and transient-state kinetic results both indicate that Dpo4 catalysis is inhibited by M1dG (260-2900-fold), with dATP being the favored insertion event for both sequences tested Saccharolobus solfataricus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
 additional information steady-state kinetic parameters for next-base extension past 3-(2'-deoxy-beta-D-erythro-pentofuranosyl) pyrimido[1,2-alpha]purin-10(3H)-one Saccharolobus solfataricus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
deoxynucleoside triphosphate + DNAn Saccharolobus solfataricus
-
 diphosphate + DNAn+1
-
 ?

Organism

Organism UniProt Comment Textmining
Saccharolobus solfataricus
-
-
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
deoxynucleoside triphosphate + DNAn
-
 Saccharolobus solfataricus diphosphate + DNAn+1
-
 ?
deoxynucleoside triphosphate + DNAn propenal and malondialdehyde react with DNA to form adducts, including 3-(2'-deoxy-beta-D-erythro-pentofuranosyl) pyrimido[1,2-alpha]purin-10(3H)-one (M1dG). When paired opposite cytosine in duplex DNA at physiological pH, M1dG undergoes ring opening to form N2-(3-oxo-1-propenyl)-dG. To improve the understanding of the basis for M1dG-induced mutagenesis, the mechanism of translesion DNA synthesis opposite M1dG by the model Y-family polymerase Dpo4 is studied at a molecular level using kinetic and structural approaches. The enzyme can bypass the exocyclic M1dG adduct in largely an error-prone fashion Saccharolobus solfataricus diphosphate + DNAn+1
-
 ?

Synonyms

Synonyms Comment Organism
DNA polymerase Dpo4
-
 Saccharolobus solfataricus