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Enzymes - Tetrahydrofolic acid

Tetrahydrofolic acid-using

Enzymes, which use Tetrahydrofolic acid as a cofactor

Enzyme name E.C.
number
Enzyme
mechanism
CATH
domain
3D
structure
Species
information
Reference
methionine synthase 2.1.1.13 M0268 2o2k (PDBsum)
3bul (PDBsum)
see all
species [1]
thymidylate synthase (FAD) 2.1.1.148 1kq4 (PDBsum)
1o26 (PDBsum)
see all
species [1]
UDP-4-amino-4-deoxy-L-arabinose formyltransferase 2.1.2.13 [IntEnz]
phosphoribosylglycinamide formyltransferase 2.1.2.2 [1]
phosphoribosylaminoimidazolecarboxamide formyltransferase 2.1.2.3 [1]
deoxyribodipyrimidine photo-lyase 4.1.99.3 M0183 1.10.579.10
3.30.572.10
see all
1dnp (PDBsum)
1iqr (PDBsum)
see all
species [1]

Further information

Methionine synthase uses THF and is a crucial enzyme for the regeneration of methionine from homocysteine. Methionine is required for the cofactor SAM, which is transformed to the toxic component homocysteine when SAM is consumed in methylation reactions. The enzyme has two isozymes, one of which depends on cobalamin and one of which does not [1].

Distribution of Tetrahydrofolic acid over enzyme reaction space (E.C.)

The E.C. tree highlights the enzymes that use the cofactor on a tree of all known E.C. numbers. Thus, it illustrates how frequently the cofactor is used in enzyme reactions and where these reactions are located withing the E.C. classification hierarchy.

In addition to the E.C. numbers extracted from primary literature, this graph also incudes the E.C. numbers that have been automatically extracted from several data resources.

E.C. tree

E.C. tree E.C. legend

Profile of Tetrahydrofolic acid-containing reactions

The E.C. wheel is a pie chart-based representation of the enzyme reactions this cofactor is involved in. The reactions are identified by E.C. number. The colouring is performed by E.C. class. The figure has four levels of circles which correspond to the four levels of the E.C. classification hierarchy. Partial and full E.C. numbers are displayed where space suffices. Each area within the outer two rings corresponds to one full E.C. serial number.

In addition to the E.C. numbers extracted from primary literature, this graph also incudes the E.C. numbers that have been automatically extracted from several data resources.

E.C. wheel

Legend

E.C. wheel E.C. legend

Tetrahydrofolic acid-synthesising

Enzymes involved in Tetrahydrofolic acid biosynthesis

Enzyme name E.C.
number
Enzyme
mechanism
CATH
domain
3D
structure
Species
information
Reference
dihydrofolate reductase 1.5.1.3 M0112 1cd2 (PDBsum)
1dr1 (PDBsum)
see all
species [2]
dihydropteroate synthase 2.5.1.15 [2]
aminodeoxychorismate synthase 2.6.1.85 M0283 [2]
2-amino-4-hydroxy-6-hydroxymethyldihydropteridine diphosphokinase 2.7.6.3 M0151 [2]
GTP cyclohydrolase I 3.5.4.16 M0038 [3]
aminodeoxychorismate lyase 4.1.3.38 M0305 1et0 (PDBsum)
1i2k (PDBsum)
see all
species [2]
6-pyruvoyltetrahydropterin synthase 4.2.3.12 M0084 [2]
dihydrofolate synthase 6.3.2.12 [2]
tetrahydrofolate synthase 6.3.2.17 [2]

Further information

[2]

Tetrahydrofolic acid-recycling

Enzymes involved in Tetrahydrofolic acid recycling

Enzyme name E.C.
number
Enzyme
mechanism
CATH
domain
3D
structure
Species
information
Reference
dihydrofolate reductase 1.5.1.3 M0112 1cd2 (PDBsum)
1dr1 (PDBsum)
see all
species [2]

Tetrahydrofolic acid-binding

Enzymes binding to Tetrahydrofolic acid (mode unknown)

Enzyme name E.C.
number
Enzyme
mechanism
CATH
domain
3D
structure
Species
information
Reference
5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase 2.1.1.14 3bq6  (PDBsum) species [ProCognate]
Thymidylate synthase 2.1.1.45 M0031 3.30.572.10
3.40.50.10420
see all
3nrr (PDBsum)
4tms (PDBsum)
see all
species [ProCognate]
Glycine hydroxymethyltransferase 2.1.2.1 M0147 3.30.572.10
3.40.50.10420
see all
1bj4 (PDBsum)
1cj0 (PDBsum)
see all
species [ProCognate]
5-formyltetrahydrofolate cyclo-ligase 6.3.3.2 3.30.572.10
3.40.50.10420
see all
1u3g  (PDBsum) species [PDB]

PROCOGNATE: proteins and cognate ligands

Protein domains that bind to this molecule

Name Link
FOLIC ACIDFOL-binding protein domains
5,10-METHENYL-6,7,8-TRIHYDROFOLIC ACIDMHF-binding protein domains
5-HYDROXYMETHYLENE-6-HYDROFOLIC ACIDTHF-binding protein domains
(6S)-5,6,7,8-TETRAHYDROFOLATETHG-binding protein domains

References

[1] pubmed:17898891
[2] pubmed:17898894
[3] pubmed:17898893
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