A third purine biosynthetic pathway encoded by aminoadenine-based viral DNA genomes.
Sleiman, D., Garcia, P.S., Lagune, M., Loc'h, J., Haouz, A., Taib, N., Rothlisberger, P., Gribaldo, S., Marliere, P., Kaminski, P.A.(2021) Science 372: 516-520
- PubMed: 33926955 
- DOI: 10.1126/science.abe6494
- Primary Citation of Related Structures:  
6FLF, 6FM0, 6FM1, 6TNH - PubMed Abstract: 
Cells have two purine pathways that synthesize adenine and guanine ribonucleotides from phosphoribose via inosylate. A chemical hybrid between adenine and guanine, 2-aminoadenine (Z), replaces adenine in the DNA of the cyanobacterial virus S-2L. We show that S-2L and Vibrio phage PhiVC8 encode a third purine pathway catalyzed by PurZ, a distant paralog of succinoadenylate synthase (PurA), the enzyme condensing aspartate and inosylate in the adenine pathway ...