4.2.2.16: levan fructotransferase (DFA-IV-forming)

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For detailed information about levan fructotransferase (DFA-IV-forming), go to the full flat file.

Reaction

Synonyms

2,6-beta-D-fructan D-fructosyl-D-fructosyltransferase (forming di-beta-D-fructofuranose 2,6':2',6-dianhydride), fructotransferase, levan, FTF, levan fructotransferase, levan fructotransferase (DFA-IV-forming), LFT, LFTase, LftM

ECTree

     4 Lyases

         4.2 Carbon-oxygen lyases

             4.2.2 Acting on polysaccharides

                4.2.2.16 levan fructotransferase (DFA-IV-forming)

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Results	in table
2	AA Sequence
9	Application
1	CAS Registry Number
11	Cloned(Commentary)
1	Crystallization (Commentary)
2	General Stability
23	Inhibitors
1	KM Value [mM]
8	Localization
4	Metals/Ions
6	Molecular Weight [Da]
2	Natural Substrates/ Products (Substrates)
159	Organism
16	PDB ID
9	pH Optimum
2	pH Range
9	Protein Variants
8	Purification (Commentary)
1	Reaction
1	Reaction Type
34	Reference
2	Source Tissue
4	Specific Activity [micromol/min/mg]
43	Substrates and Products (Substrate)
8	Subunits
29	Synonyms
1	Systematic Name
8	Temperature Optimum [°C]
1	Temperature Range [°C]
5	Temperature Stability [°C]

Systematic Name

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Systematic Name on EC 4.2.2.16 - levan fructotransferase (DFA-IV-forming)

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SYSTEMATIC NAME

IUBMB Comments

(2->6)-beta-D-fructan lyase (di-beta-D-fructofuranose-2,6':2',6-dianhydride-forming)

This enzyme, like EC 4.2.2.17 [inulin fructotransferase (DFA-I-forming)] and EC 4.2.2.18 [inulin fructotransferase (DFA-III-forming)] eliminates the fructan chain from the terminal disaccharide leaving a difructose dianhydride. These enzymes have long been known as fructotransferases, so this is retained in the accepted name. Since the transfer is intramolecular, the reaction is an elimination and, hence, the enzyme is a lyase, belonging in EC 4.