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Literature summary for 4.2.1.143 extracted from

  • Chiou, C.H.; Lee, L.W.; Owens, S.A.; Whallon, J.H.; Klomparens, K.L.; Townsend, C.A.; Linz, J.E.
    Distribution and sub-cellular localization of the aflatoxin enzyme versicolorin B synthase in time-fractionated colonies of Aspergillus parasiticus (2004), Arch. Microbiol., 182, 67-79.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
expression in Escherichia coli Aspergillus parasiticus

Localization

Localization Comment Organism GeneOntology No. Textmining
cytoplasm enzyme distributes throughout the cytoplasm and concentrates in ring-like structures surrounding nuclei Aspergillus parasiticus 5737
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Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
72000
-
x * 72000, and x * 78000, SDS-PAGE Aspergillus parasiticus
78000
-
x * 72000, and x * 78000, SDS-PAGE Aspergillus parasiticus

Organism

Organism UniProt Comment Textmining
Aspergillus parasiticus Q12062
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-

Source Tissue

Source Tissue Comment Organism Textmining
cell culture highest abundance of enzyme in colony fraction S2 consisting of cells that have grown for 24-48 h Aspergillus parasiticus
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conidiophore asexual developmental structures Aspergillus parasiticus
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hypha vegetative hyphae Aspergillus parasiticus
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Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
versiconal i.e. (2S,3S)-2,4,6,8-tetrahydroxy-3-(2-hydroxyethyl)anthra[2,3-b]furan-5,10-dione Aspergillus parasiticus versicolorin B + H2O (3aR,12bS)-8,10,12-trihydroxy-1,2,3a,12b-tetrahydroanthra[2,3-b]furo[3,2-d]furan-6,11-dione ?

Subunits

Subunits Comment Organism
? x * 72000, and x * 78000, SDS-PAGE Aspergillus parasiticus

General Information

General Information Comment Organism
physiological function enzyme catalyzes bisfuran ring closure in versiconal hemiacetal to form versicolorin B. This reaction is required for the subsequent activation to aflatoxin B1-8,9 epoxide, a highly reactive and toxic aflatoxin metabolite Aspergillus parasiticus