Chemistry:Phosphoribosylamine
From HandWiki
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| Other names
PRA
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| Identifiers | |
3D model (JSmol)
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| ChEBI | |
| ChemSpider | |
| MeSH | Phosphoribosylamine |
PubChem CID
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| Properties | |
| C5H12NO7P | |
| Molar mass | 229.125 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Phosphoribosylamine (PRA) is a biochemical intermediate in the formation of purine nucleotides via inosine-5-monophosphate, and hence is a building block for DNA and RNA.[1][2][3] The vitamins thiamine[4] and cobalamin[5] also contain fragments derived from PRA.[6]
It is the product of the enzyme amidophosphoribosyltransferase which attaches ammonia from glutamine to phosphoribosyl pyrophosphate (PRPP) at its anomeric carbon:[2]
- PRPP + glutamine → PRA + glutamate + PPi
The biosynthesis pathway next combines PRA with glycine in a process driven by ATP giving glycineamide ribonucleotide (GAR). The enzyme phosphoribosylamine—glycine ligase catalyses the reaction forming an amide bond:[7]
- PRA + glycine + ATP → GAR + ADP + Pi
See also
References
- ↑ R. Caspi (2009-01-13). "Pathway: 5-aminoimidazole ribonucleotide biosynthesis I". MetaCyc Metabolic Pathway Database. https://biocyc.org/META/NEW-IMAGE?type=PATHWAY&object=PWY-6121.
- ↑ 2.0 2.1 Zhang, Y.; Morar, M.; Ealick, S.E. (2008). "Structural biology of the purine biosynthetic pathway". Cellular and Molecular Life Sciences 65: 3699–3724. doi:10.1007/s00018-008-8295-8. PMID 18712276.
- ↑ Gupta, Rani; Gupta, Namita (2021). "Nucleotide Biosynthesis and Regulation". Fundamentals of Bacterial Physiology and Metabolism. pp. 525–554. doi:10.1007/978-981-16-0723-3_19. ISBN 978-981-16-0722-6.
- ↑ Chatterjee, Abhishek; Hazra, Amrita B.; Abdelwahed, Sameh; Hilmey, David G.; Begley, Tadhg P. (2010). "A "Radical Dance" in Thiamin Biosynthesis: Mechanistic Analysis of the Bacterial Hydroxymethylpyrimidine Phosphate Synthase". Angewandte Chemie International Edition 49 (46): 8653–8656. doi:10.1002/anie.201003419. PMID 20886485.
- ↑ R. Caspi (2019-09-23). "Pathway: 5-hydroxybenzimidazole biosynthesis (anaerobic)". MetaCyc Metabolic Pathway Database. https://biocyc.org/META/NEW-IMAGE?type=PATHWAY&object=PWY-8097.
- ↑ Mehta, Angad P.; Abdelwahed, Sameh H.; Fenwick, Michael K.; Hazra, Amrita B.; Taga, Michiko E.; Zhang, Yang; Ealick, Steven E.; Begley, Tadhg P. (2015). "Anaerobic 5-Hydroxybenzimidazole Formation from Aminoimidazole Ribotide: An Unanticipated Intersection of Thiamin and Vitamin B12 Biosynthesis". Journal of the American Chemical Society 137 (33): 10444–10447. doi:10.1021/jacs.5b03576. PMID 26237670.
- ↑ Welin, Martin; Grossmann, Jörg Günter; Flodin, Susanne; Nyman, Tomas; Stenmark, Pål; Trésaugues, Lionel; Kotenyova, Tetyana; Johansson, Ida et al. (2010). "Structural studies of tri-functional human GART". Nucleic Acids Research 38 (20): 7308–7319. doi:10.1093/nar/gkq595. PMID 20631005.
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