NDLI: Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

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Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

Erratum to: Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

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Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

Content Provider	Springer Nature Link
Author	Hansen, Michael Riis Jensen, Kristine Steen Rasmussen, Mads Skytte Christoffersen, Stig Kadziola, Anders Jensen, Kaj Frank
Copyright Year	2013
Abstract	Two open reading frames in the genome of Sulfolobus solfataricus (SSO2341 and SSO2424) were cloned and expressed in E. coli. The protein products were purified and their enzymatic activity characterized. Although SSO2341 was annotated as a gene (gpT-1) encoding a 6-oxopurine phosphoribosyltransferase (PRTase), the protein product turned out to be a PRTase highly specific for adenine and we suggest that the reading frame should be renamed apT. The other reading frame SSO2424 (gpT-2) proved to be a true 6-oxopurine PRTase active with hypoxanthine, xanthine and guanine as substrates, and we suggest that the gene should be renamed gpT. Both enzymes exhibited unusual profiles of activity versus pH. The adenine PRTase showed the highest activity at pH 7.5–8.5, but had a distinct peak of activity also at pH 4.5. The 6-oxo PRTase showed maximal activity with hypoxanthine and guanine around pH 4.5, while maximal activity with xanthine was observed at pH 7.5. We discuss likely reasons why SSO2341 in S. solfataricus and similar open reading frames in other Crenarchaeota could not be identified as genes encoding APRTase.
Starting Page	179
Ending Page	187
Page Count	9
File Format	PDF
ISSN	14310651
Journal	Extremophiles
Volume Number	18
Issue Number	1
e-ISSN	14334909
Language	English
Publisher	Springer Japan
Publisher Date	2013-10-25
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nucleotide synthesis in sulfolobales Phosphoribosyltransferase Crenarchaeota Archaea Substrate specificity of enzymes Microbiology Biotechnology Biochemistry Microbial Ecology
Content Type	Text
Resource Type	Article
Subject	Medicine Molecular Medicine Microbiology

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Erratum to: Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

Erratum to: Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

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Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus

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Specificities and pH profiles of adenine and hypoxanthine–guanine–xanthine phosphoribosyltransferases (nucleotide synthases) of the thermoacidophile archaeon Sulfolobus solfataricus