This HMM describes phosphoribosylglycinamide formyltransferase (GAR transformylase), one of several proteins in formyl_transf (Pfam family PF00551). This enzyme uses formyl tetrahydrofolate as a formyl group donor to produce 5'-phosphoribosyl-N-formylglycinamide. PurT, a different GAR transformylase, uses ATP and formate rather than formyl tetrahydrofolate. Experimental proof includes complementation of E. coli purN mutants by orthologs from vertebrates (where it is a domain of a multifunctional protein), Bacillus subtilis, and Arabidopsis. No archaeal example was detected. In phylogenetic analyses, the member from Saccharomyces cerevisiae shows a long branch length but membership in the family, while the formyltetrahydrofolate deformylases form a closely related outgroup.
- Gene:
- purN
GO Terms:- Molecular Function:
- phosphoribosylglycinamide formyltransferase activity (GO:0004644)
- Biological Process:
- 'de novo' IMP biosynthetic process (GO:0006189)
- Date:
- 2024-05-30