Doc:SysName
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EC番号は酵素反応のタイプおよび基質（反応物）のタイプによって分類されます。分類を目的として反応式を記すため方向は実際に観測された向きと異なる場合があります。システム名は常に酵素で触媒される最初のステップを表現しており、続く反応ステップは括弧の中に書きます。例：acetyl-CoA:glyoxylate C-acetyltransferase (thioester-hydrolysing, carboxymethyl-forming) (EC 2.3.3.9) | EC番号は酵素反応のタイプおよび基質（反応物）のタイプによって分類されます。分類を目的として反応式を記すため方向は実際に観測された向きと異なる場合があります。システム名は常に酵素で触媒される最初のステップを表現しており、続く反応ステップは括弧の中に書きます。例：acetyl-CoA:glyoxylate C-acetyltransferase (thioester-hydrolysing, carboxymethyl-forming) (EC 2.3.3.9) | ||
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| + | ; [[Template:ECHierarchy#EC_Class_1:_Oxidoreductases|EC class 1 Oxidoreductase (酸化還元酵素)]] | ||
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: In this class, a substrate is oxidized as hydrogen donor. The systematic name is ''donor:acceptor oxidoreductase''. The common name is usually ''dehydrogenase'', ''reductase'' (when reverse reaction is demonstrated), or ''oxydase'' (only when O<sub>2</sub> is the acceptor). | : In this class, a substrate is oxidized as hydrogen donor. The systematic name is ''donor:acceptor oxidoreductase''. The common name is usually ''dehydrogenase'', ''reductase'' (when reverse reaction is demonstrated), or ''oxydase'' (only when O<sub>2</sub> is the acceptor). | ||
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: このクラスでは基質が水素のドナーとして酸化されます。システム名は''donor:acceptor oxidoreductase''です。一般名は通常''dehydrogenase'', ''reductase''（逆反応が観測された場合）、または''oxydase''（O<sub>2</sub>がアクセプターのとき）です。 | : このクラスでは基質が水素のドナーとして酸化されます。システム名は''donor:acceptor oxidoreductase''です。一般名は通常''dehydrogenase'', ''reductase''（逆反応が観測された場合）、または''oxydase''（O<sub>2</sub>がアクセプターのとき）です。 | ||
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| + | ;[[Template:ECHierarchy#EC_Class_2:_Transferases|EC class 2 Tranferase (転移酵素)]] | ||
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: In this class, a chemical 'group' is transferred from a 'donor' to an 'acceptor'. The systematic name is ''donor:acceptor grouptransferase''. The common name is usually ''acceptor grouptransferase'', ''donor grouptransferase'', or ''phosphorylase'' (when phosphate is an acceptor). Transaminase is formally considered as the combination of oxidative deamination of the donor followed by reductive amination of the acceptor, but is classified in this class (EC 2.6.1). | : In this class, a chemical 'group' is transferred from a 'donor' to an 'acceptor'. The systematic name is ''donor:acceptor grouptransferase''. The common name is usually ''acceptor grouptransferase'', ''donor grouptransferase'', or ''phosphorylase'' (when phosphate is an acceptor). Transaminase is formally considered as the combination of oxidative deamination of the donor followed by reductive amination of the acceptor, but is classified in this class (EC 2.6.1). | ||
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: このクラスでは化学基がドナーからアクセプターへと転移します。システム名は''donor:acceptor grouptransferase''です。一般名は通常、''acceptor grouptransferase'', ''donor grouptransferase'', または ''phosphorylase'' （リン酸がアクセプターのとき）です。トランスアミナーゼは正確にはドナーの酸化的脱アミノ反応とアクセプターの還元的アミノ化反応から構成されますがこのクラス(EC2.6.1)に分類されます。 | : このクラスでは化学基がドナーからアクセプターへと転移します。システム名は''donor:acceptor grouptransferase''です。一般名は通常、''acceptor grouptransferase'', ''donor grouptransferase'', または ''phosphorylase'' （リン酸がアクセプターのとき）です。トランスアミナーゼは正確にはドナーの酸化的脱アミノ反応とアクセプターの還元的アミノ化反応から構成されますがこのクラス(EC2.6.1)に分類されます。 | ||
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| + | ;[[Template:ECHierarchy#EC_Class_3:_Hydrolases|EC class 3 Hydrolase (加水分解酵素)]] | ||
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: In this class, hydrolytic cleavage of C-O, C-N, C-C and some other bonds occurs. The systematic name is ''hydrolase''. The common name is usually the substrate name with -ase. Hydrolase is formally considered as tranfer of a specific group to water as acceptor. The names of peptide hydrolases (''proteinase'') is based on their 'esterolytic' action. | : In this class, hydrolytic cleavage of C-O, C-N, C-C and some other bonds occurs. The systematic name is ''hydrolase''. The common name is usually the substrate name with -ase. Hydrolase is formally considered as tranfer of a specific group to water as acceptor. The names of peptide hydrolases (''proteinase'') is based on their 'esterolytic' action. | ||
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: このクラスではC-O, C-N, C-C等の化学結合が水分子によって開裂します。システム名は''hydrolase''です。一般名は通常、基質名に-aseをつけた形です。ヒドロラーゼは、正確には化学基を水分子をアクセプターとして転移する酵素のことです。ペプチドのヒドロラーゼ(''proteinase'')はエステルを開裂する機能を持つためここに分類されます。 | : このクラスではC-O, C-N, C-C等の化学結合が水分子によって開裂します。システム名は''hydrolase''です。一般名は通常、基質名に-aseをつけた形です。ヒドロラーゼは、正確には化学基を水分子をアクセプターとして転移する酵素のことです。ペプチドのヒドロラーゼ(''proteinase'')はエステルを開裂する機能を持つためここに分類されます。 | ||
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| + | ;[[Template:ECHierarchy#EC_Class_4:_Lyases|EC class 4 Lyase (除去付加酵素)]] | ||
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: In this class, C-C, C-O, C-N, and other bonds are cleaved by elimination, leaving double bonds or rings. The systematic name is ''substrate group-lyase''. Major common names are ''decarboxylase'', ''aldolase'', and ''dehydratase''. When reverse reaction is demonstrated, ''synthase'' (not synthetase) may be used. Pyridoxal-phosphate enzymes usually replace the eliminated substituent by some other group, and therefore, may be formally considered as alkyl-transferase. | : In this class, C-C, C-O, C-N, and other bonds are cleaved by elimination, leaving double bonds or rings. The systematic name is ''substrate group-lyase''. Major common names are ''decarboxylase'', ''aldolase'', and ''dehydratase''. When reverse reaction is demonstrated, ''synthase'' (not synthetase) may be used. Pyridoxal-phosphate enzymes usually replace the eliminated substituent by some other group, and therefore, may be formally considered as alkyl-transferase. | ||
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: このクラスはではC-C, C-O, C-N等の化学結合が脱離反応によって開裂し二重結合や環化を引き起こします。システム名は''substrate group-lyase''です。主な一般名には''decarboxylase'', ''aldolase'', ''dehydratase''があります。もし逆反応が観測されていた場合、''synthase'' (synthetaseではない)という言葉が使われます。ピリドキサル燐酸を補酵素とする酵素は通常、脱離した化学基を他の基で補います。よって正確にはアルキル基の転移酵素です。 | : このクラスはではC-C, C-O, C-N等の化学結合が脱離反応によって開裂し二重結合や環化を引き起こします。システム名は''substrate group-lyase''です。主な一般名には''decarboxylase'', ''aldolase'', ''dehydratase''があります。もし逆反応が観測されていた場合、''synthase'' (synthetaseではない)という言葉が使われます。ピリドキサル燐酸を補酵素とする酵素は通常、脱離した化学基を他の基で補います。よって正確にはアルキル基の転移酵素です。 | ||
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| + | ; [[Template:ECHierarchy#EC_Class_5:_Isomerases|EC class 5 Isomerase (異性化酵素)]] | ||
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: In this class, geometry or structure is changed within one molecule. Common names include ''racemase'', ''epimerase'', ''(cis-trans-)isomerase'', ''tautomerase'', ''mutase'' or ''cycloisomerase''. | : In this class, geometry or structure is changed within one molecule. Common names include ''racemase'', ''epimerase'', ''(cis-trans-)isomerase'', ''tautomerase'', ''mutase'' or ''cycloisomerase''. | ||
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: このクラスでは1分子内で立体幾何や構造が変化します。一般名は''racemase'', ''epimerase'', ''(cis-trans-)isomerase'', ''tautomerase'', ''mutase'',''cycloisomerase''等です。 | : このクラスでは1分子内で立体幾何や構造が変化します。一般名は''racemase'', ''epimerase'', ''(cis-trans-)isomerase'', ''tautomerase'', ''mutase'',''cycloisomerase''等です。 | ||
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| + | ; [[Template:ECHierarchy#EC_Class_6:_Ligases|EC class 6 Ligase (合成酵素)]] | ||
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: In this class, two substrates are joined with the hydrolysis of ATP. The systematic name is ''X:Y ligase (ADP-forming)''. An obsolete common name is ''synthetase'' (not synthase in EC4). | : In this class, two substrates are joined with the hydrolysis of ATP. The systematic name is ''X:Y ligase (ADP-forming)''. An obsolete common name is ''synthetase'' (not synthase in EC4). | ||
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: このクラスでは二つの基質がATPの加水分解を伴って結合します。システム名は''X:Y ligase (ADP-forming)''です。以前は''synthetase'' (EC4のsynthaseではない)という言葉も使われました。 | : このクラスでは二つの基質がATPの加水分解を伴って結合します。システム名は''X:Y ligase (ADP-forming)''です。以前は''synthetase'' (EC4のsynthaseではない)という言葉も使われました。 | ||
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Latest revision as of 22:10, 8 March 2009
[edit] Systematic Name of Enzymes (酵素のシステム名)
EC (Enzyme Commission) number is assigned according to the type of reaction catalysed (EC level 1) and the type(s) of the substrate(s). Since reactions are written for the purpose of classification, the direction does not reflect the actually demonstrated catalysis. The systematic name always reflects the first enzyme-catalysed step, and subsequent transformations are written in parentheses, e.g. acetyl-CoA:glyoxylate C-acetyltransferase (thioester-hydrolysing, carboxymethyl-forming) (EC 2.3.3.9).
- In this class, a substrate is oxidized as hydrogen donor. The systematic name is donor:acceptor oxidoreductase. The common name is usually dehydrogenase, reductase (when reverse reaction is demonstrated), or oxydase (only when O2 is the acceptor).
- In this class, a chemical 'group' is transferred from a 'donor' to an 'acceptor'. The systematic name is donor:acceptor grouptransferase. The common name is usually acceptor grouptransferase, donor grouptransferase, or phosphorylase (when phosphate is an acceptor). Transaminase is formally considered as the combination of oxidative deamination of the donor followed by reductive amination of the acceptor, but is classified in this class (EC 2.6.1).
- In this class, hydrolytic cleavage of C-O, C-N, C-C and some other bonds occurs. The systematic name is hydrolase. The common name is usually the substrate name with -ase. Hydrolase is formally considered as tranfer of a specific group to water as acceptor. The names of peptide hydrolases (proteinase) is based on their 'esterolytic' action.
- In this class, C-C, C-O, C-N, and other bonds are cleaved by elimination, leaving double bonds or rings. The systematic name is substrate group-lyase. Major common names are decarboxylase, aldolase, and dehydratase. When reverse reaction is demonstrated, synthase (not synthetase) may be used. Pyridoxal-phosphate enzymes usually replace the eliminated substituent by some other group, and therefore, may be formally considered as alkyl-transferase.
- In this class, geometry or structure is changed within one molecule. Common names include racemase, epimerase, (cis-trans-)isomerase, tautomerase, mutase or cycloisomerase.
- In this class, two substrates are joined with the hydrolysis of ATP. The systematic name is X:Y ligase (ADP-forming). An obsolete common name is synthetase (not synthase in EC4).
[edit] Systematic Name of Metabolites (代謝物のシステム名)
準備中
