“Phosphoribosylaminoimidazolecarboxamide formyltransferase”的意思、由来-开放百科全书

词条

Phosphoribosylaminoimidazolecarboxamide formyltransferase

释义

Nomenclature
Structural studies
References

{{enzyme
| Name = phosphoribosylaminoimidazolecarboxamide formyltransferase
| EC_number = 2.1.2.3
| CAS_number = 9032-03-5
| IUBMB_EC_number = 2/1/2/3
| GO_code = 0004643
| image =
| width =
| caption =
}}

In enzymology, a phosphoribosylaminoimidazolecarboxamide formyltransferase ({{EC number|2.1.2.3}}), also known by the shorter name AICAR transformylase, is an enzyme that catalyzes the chemical reaction

10-formyltetrahydrofolate + AICAR tetrahydrofolate + FAICAR

Thus, the two substrates of this enzyme are 10-formyltetrahydrofolate and AICAR, whereas its two products are tetrahydrofolate and FAICAR.

This enzyme participates in purine metabolism and one carbon pool by folate.

Nomenclature

This enzyme belongs to the family of transferases that transfer one-carbon groups, specifically the hydroxymethyl-, formyl- and related transferases. The systematic name of this enzyme class is 10-formyltetrahydrofolate:5-phosphoribosyl-5-amino-4-imidazole-carb oxamide N-formyltransferase. Other names in common use include:

10-formyltetrahydrofolate:5-phosphoribosyl-5-amino-4-imidazolecarboxamide formyltransferase
5-amino-1-ribosyl-4-imidazolecarboxamide 5-phosphate,
5-amino-4-imidazolecarboxamide ribonucleotide transformylase,
5-amino-4-imidazolecarboxamide ribotide transformylase,
5-phosphoribosyl-5-amino-4-imidazolecarboxamide formyltransferase,
AICAR formyltransferase,
AICAR transformylase,
aminoimidazolecarboxamide ribonucleotide transformylase, and
transformylase,
bifunctional purine biosynthesis protein PURH,
ATIC.

Structural studies

As of late 2007, 11 structures have been solved for this class of enzymes, with PDB accession codes {{PDB link|1G8M}}, {{PDB link|1M9N}}, {{PDB link|1OZ0}}, {{PDB link|1P4R}}, {{PDB link|1PKX}}, {{PDB link|1PL0}}, {{PDB link|1THZ}}, {{PDB link|2B1G}}, {{PDB link|2B1I}}, {{PDB link|2IU0}}, and {{PDB link|2IU3}}.

References

{{cite journal |vauthors=HARTMAN SC, BUCHANAN JM | date = 1959 | title = Biosynthesis of the purines. XXVI. The identification of the formyl donors of the transformylation reactions | journal = J. Biol. Chem. | volume = 234 | pages = 1812–6 | pmid = 13672969 | issue = 7 }}

2 : EC 2.1.2|Enzymes of known structure

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