List of EC numbers (EC 2)

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This list contains a list of EC numbers for the second group, EC 2, transferases, placed in numerical order as determined by the Nomenclature Committee of the International Union of Biochemistry and Molecular Biology.

The Enzyme Commission number is a numerical classification scheme for enzymes, based on the chemical reactions they catalyze. As a system of enzyme nomenclature, every EC number is associated with a recommended name for the respective enzyme.

The International Union of Biochemistry and Molecular Biology (IUBMB) is an international non-governmental organisation concerned with biochemistry and molecular biology. Formed in 1955 as the International Union of Biochemistry, the union has presently 77 member countries.


EC 2.1: Transferring One-Carbon Groups

EC 2.1.1: Methyltransferases

In enzymology, a nicotinamide N-methyltransferase (NNMT) is an enzyme that catalyzes the chemical reaction

Guanidinoacetate N-methyltransferase protein-coding gene in the species Homo sapiens

Guanidinoacetate N-methyltransferase is an enzyme that catalyzes the chemical reaction and is encoded by gene GAMT located on chromosome 19p13.3.

In enzymology, a thetin-homocysteine S-methyltransferase is an enzyme that catalyzes the chemical reaction

Phosphoribosylglycinamide formyltransferase class of enzymes

Phosphoribosylglycinamide formyltransferase (EC, 2-amino-N-ribosylacetamide 5'-phosphate transformylase, GAR formyltransferase, GAR transformylase, glycinamide ribonucleotide transformylase, GAR TFase, 5,10-methenyltetrahydrofolate:2-amino-N-ribosylacetamide ribonucleotide transformylase) is an enzyme with systematic name 10-formyltetrahydrofolate:5'-phosphoribosylglycinamide N-formyltransferase. This enzyme catalyses the following chemical reaction

In enzymology, a phosphoribosylaminoimidazolecarboxamide formyltransferase, also known by the shorter name AICAR transformylase, is an enzyme that catalyzes the chemical reaction

In enzymology, a glycine formimidoyltransferase is an enzyme that catalyzes the chemical reaction

EC 2.1.3: Carboxy- and Carbamoyltransferases

In enzymology, a methylmalonyl-CoA carboxytransferase is an enzyme that catalyzes the chemical reaction

Aspartate carbamoyltransferase enzyme

Aspartate carbamoyltransferase catalyzes the first step in the pyrimidine biosynthetic pathway.

In enzymology, an oxamate carbamoyltransferase is an enzyme that catalyzes the chemical reaction

EC 2.1.4: Amidinotransferases

In enzymology, a scyllo-inosamine-4-phosphate amidinotransferase is an enzyme that catalyzes the chemical reaction

EC 2.2: Transferring Aldehyde or Ketonic Groups

EC 2.2.1: Transketolases and Transaldolases

Transketolase enzyme

Transketolase encoded by the TKT gene is an enzyme of both the pentose phosphate pathway in all organisms and the Calvin cycle of photosynthesis. It catalyzes two important reactions, which operate in opposite directions in these two pathways. In the first reaction of the non-oxidative pentose phosphate pathway, the cofactor thiamine diphosphate accepts a 2-carbon fragment from a 5-carbon ketose (D-xylulose-5-P), then transfers this fragment to a 5-carbon aldose (D-ribose-5-P) to form a 7-carbon ketose (sedoheptulose-7-P). The abstraction of two carbons from D-xylulose-5-P yields the 3-carbon aldose glyceraldehyde-3-P. In the Calvin cycle, transketolase catalyzes the reverse reaction, the conversion of sedoheptulose-7-P and glyceraldehyde-3-P to pentoses, the aldose D-ribose-5-P and the ketose D-xylulose-5-P.

Transaldolase enzyme family

Transaldolase is an enzyme of the non-oxidative phase of the pentose phosphate pathway. In humans, transaldolase is encoded by the TALDO1 gene.

In enzymology, a formaldehyde transketolase is an enzyme that catalyzes the chemical reaction

EC 2.3: Acyltransferases

EC 2.3.1: Transferring groups other than amino-acyl groups

EC 2.3.2: Aminoacyltransferases

EC 2.3.3: Acyl groups converted into alkyl on transfer

EC 2.4: Glycosyltransferases

EC 2.4.1: Hexosyltransferases

EC 2.4.2: Pentosyltransferases

EC 2.4.99: Transferring Other Glycosyl Groups

EC 2.5: Transferring Alkyl or Aryl Groups, Other than Methyl Groups

EC 2.6: Transferring Nitrogenous Groups

EC 2.6.1: Transaminases

EC 2.6.2: Amidinotransferases

EC 2.6.3: Oximinotransferases

EC 2.6.99: Transferring Other Nitrogenous Groups

EC 2.7: Transferring Phosphorus-Containing Groups

EC 2.7.1: Phosphotransferases with an alcohol group as acceptor

EC 2.7.2: Phosphotransferases with a carboxy group as acceptor

EC 2.7.3: Phosphotransferases with a nitrogenous group as acceptor

EC 2.7.4: Phosphotransferases with a phosphate group as acceptor

EC 2.7.5: Phosphotransferases with regeneration of donors, apparently catalysing intramolecular transfers

EC 2.7.6: Diphosphotransferases

EC 2.7.7: Nucleotidyltransferases