| inorganic pyrophosphatase | A phosphohydrolase catalyzing hydrolysis of inorganic pyrophosphate to two orthophosphates. (05 Mar 2000) |
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| guanosine-3',5'-bis(diphosphate) 3'-pyrophosphatase | <enzyme> Catalyses breakdown of guanosine tetraphosphate into guanosine diphosphate and pyrophosphate; spot protein is isolated from e. Coli Registry number: EC 3.1.7.2 Synonym: ppgpp-3'-pyrophosphohydrolase, guanosine tetraphosphate-3'-pyrophosphohydrolase, spot protein, spot gene product, ppgpp pyrophosphorylase, ppgppase, guanosine-5'-diphosphate 3'-diphosphate pyrophosphorylase (26 Jun 1999) |
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| guanosine-5'-triphosphate, 3'-diphosphate pyrophosphatase | <enzyme> Catalyses the hydrolysis of guanosine 5'-triphosphate, 3'-diphosphate to yield guanosine 5'-diphosphate, 3'-diphosphate and orthophosphate; from E coli; also hydrolyzes other guanosine 5'-triphosphate derivatives with at least one unsubstituted phosphate group on the 3'-position, but not GTP, ATP or adenosine 5'-triphosphate, 3'-diphosphate Registry number: EC 3.6.1.40 Synonym: guanosine pentaphosphate phosphohydrolase, GTPdp pyrophosphatase, pppgpp 5'-phosphohydrolase, guanosine 5'-triphosphate-3'diphosphate 5'-phosphohydrolase, pppgpp-5'-phosphohydrolase, pppgpp-5'-phosphatase (26 Jun 1999) |
| pyrophosphatase | Any enzyme cleaving a pyrophosphate bond between two phosphoric groups, leaving one on each of the two fragments; e.g., inorganic pyrophosphatase, NAD+ p. (cleaves NAD, etc., to mononucleotides), ATP pyrophosphatase (cleaves inorganic pyrophosphate from ATP, leaving AMP). See: flavin adenine dinucleotide. (05 Mar 2000) |
| nucleoside-diphosphosugar pyrophosphatase | <enzyme> Catalyses the conversion of xdp-sugar to xmp and sugar 1-phosphate Registry number: EC 3.6.1.- Synonym: ndp-sugar pyrophosphatase, nucleotide-sugar pyrophosphatase (26 Jun 1999) |
| oligosaccharide-diphosphodolichol pyrophosphatase | <enzyme> From yeast microsomal membranes; hydrolyses the pyrophosphate bond of oligosaccharide-pyrophosphodolichol into oligosaccharide phosphates plus dolicholphosphate Registry number: EC 3.6.1.44 Synonym: ols-pp-dol pyrophosphatase, oligosaccharide-pyrophosphodolichol pyrophosphatase (26 Jun 1999) |
| thiamine pyrophosphatase | <enzyme> The coenzyme form of vitamin B1 (thiamine), deficiency of which causes beri beri. Forms the prosthetic group of pyruvate dehydrogenase, _ ketoglutarate dehydrogenase and transketolase, in which it is involved in transfer of a 2 carbon unit. Marker for the trans cisternae of the Golgi complex. (18 Nov 1997) |
| FAD pyrophosphatase | <enzyme> Hydrolyzes fad to flavin mononucleotide and AMP Registry number: EC 3.6.1.18 Synonym: flavin-adenine dinucleotide phosphohydrolase, fad phosphohydrolase (26 Jun 1999) |
| UDPglucose pyrophosphatase | <enzyme> Acts on udpg to form uridine monophosphate and glucose-1-phosphate Registry number: EC 3.6.1.- (26 Jun 1999) |
| UDP glucuronate pyrophosphatase | <enzyme> Udpga is converted to ump plus glucuronic acid-1-phosphate Registry number: EC 3.6.1.- Synonym: udp-glucuronic acid pyrophosphatase (26 Jun 1999) |
| farnesyl pyrophosphatase | <enzyme> Catalyses conversion of farnesyl pyrophosphate to pyrophosphate and farnesol Registry number: EC 3.6.1.- Synonym: fppase (26 Jun 1999) |
| carbon compounds, inorganic | Inorganic compounds that contain carbon as an integral part of the molecule but are not derived from hydrocarbons. (12 Dec 1998) |
| chemistry, inorganic | A field of chemistry which pertains to chemical compounds or ions that do not contain the element carbon (with the exception of carbon dioxide and compounds containing a carbonate radical, e.g., calcium carbonate). (12 Dec 1998) |
| inorganic | Pertaining to substances not of organic origin. (18 Nov 1997) |
| inorganic acid | An acid made up of molecules not containing organic radicals; e.g., HCl, H2SO4, H3PO4. (05 Mar 2000) |
| inorganic chemicals | A broad class of substances encompassing all those that do not include carbon and its derivatives as their principal elements. However, carbides, carbonates, cyanides, cyanates, and carbon disulfide are included in this class. (12 Dec 1998) |