(5-formylfuran-3-yl)methyl phosphate synthase, also known as 4-HFC-P synthase, is involved in the production of methanofuran [1,2]. This family has a classical TIM-barrel structure whose biological unit is a homohexamer [1].

1: Biosynthesis of the 5-(Aminomethyl)-3-furanmethanol moiety of methanofuran. Miller D, Wang Y, Xu H, Harich K, White RH; Biochemistry. 2014;53:4635-4647. PMID:24977328

2: Mechanism of the Enzymatic Synthesis of 4-(Hydroxymethyl)-2- furancarboxaldehyde-phosphate (4-HFC-P) from Glyceraldehyde-3-phosphate Catalyzed by 4-HFC-P Synthase. Wang Y, Jones MK, Xu H, Ray WK, White RH; Biochemistry. 2015;54:2997-3008. PMID:25905665

3: Structure of the methanofuran/methanopterin-biosynthetic enzyme MJ1099 from Methanocaldococcus jannaschii. Bobik TA, Morales EJ, Shin A, Cascio D, Sawaya MR, Arbing M, Yeates TO, Rasche ME; Acta Crystallogr F Struct Biol Commun. 2014;70:1472-1479. PMID:25372812