Guanine deaminase

Guanine deaminase (or guanine aminohydrolase) is an enzyme which converts guanine to xanthine.

xanthine. Note nitrogen replaced with oxygen. (Ignore rotation.)

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v • d • e Carbon-nitrogen non-peptide hydrolases (EC 3.5)

3.5.1 - Amidohydrolases	Asparaginase - Glutaminase - Urease - Biotinidase - Aspartoacylase - Ceramidase -Aspartylglucosaminidase - Fatty acid amide hydrolase - Histone deacetylase (Sirtuin)

3.5.2	Barbiturase - Beta-lactamase

3.5.3	Arginase - Agmatinase

3.5.4 - Aminohydrolases	Guanine deaminase - Adenosine deaminase - AMP deaminase - Inosine monophosphate synthase - DCMP deaminase - GTP cyclohydrolase I

Other	Nitrilase - Thiaminase II

v • d • e

Anabolism	R5P->IMP: Ribose-phosphate diphosphokinase - Amidophosphoribosyltransferase - Phosphoribosylglycinamide formyltransferase - AIR synthetase (FGAM cyclase) - Phosphoribosylaminoimidazole carboxylase - Phosphoribosylaminoimidazolesuccinocarboxamide synthase - IMP synthase IMP->AMP: Adenylosuccinate synthase - Adenylosuccinate lyase - reverse (AMP deaminase) IMP->GMP: IMP dehydrogenase - GMP synthase - reverse (GMP reductase)

Nucleotide salvage	Hypoxanthine-guanine phosphoribosyltransferase - Adenine phosphoribosyltransferase

Catabolism	Adenosine deaminase - Purine nucleoside phosphorylase - Guanine deaminase - Xanthine oxidase - Urate oxidase

Anabolism	CAD (Carbamoyl phosphate synthase II, Aspartate carbamoyltransferase, Dihydroorotase) Dihydroorotate dehydrogenase - Orotidine 5'-phosphate decarboxylase/Uridine monophosphate synthetase CTP synthase

Catabolism	Dihydropyrimidine dehydrogenase - Dihydropyrimidinase/DPYS - Beta-ureidopropionase/UPB1