Reaction: sucrose 6F-phosphate + H2O = sucrose + phosphate
Other name(s): sucrose 6-phosphate hydrolase; sucrose-phosphate hydrolase; sucrose-phosphate phosphohydrolase; sucrose-6-phosphatase; sucrose phosphatase; sucrose-6-phosphate phosphatase; SPP
Systematic name: sucrose-6F-phosphate phosphohydrolase
Comments: Requires Mg2+ for maximal activity [2]. This is the final step in the sucrose-biosynthesis pathway. The enzyme is highly specific for sucrose 6-phosphate, with fructose 6-phosphate unable to act as a substrate [2]. Belongs in the haloacid dehydrogenase (HAD) superfamily. The F of sucrose 6F-phosphate is used to indicate that the fructose residue of sucrose carries the substituent.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 9059-33-0
References:
1. Hawker, J.S. and Hatch, M.D. A specific sucrose phosphatase from plant tissues. Biochem. J. 99 (1966) 102-107. [PMID: 4290548]
2. Lunn, J.E., Ashton, A.R., Hatch, M.D. and Heldt, H.W. Purification, molecular cloning, and sequence analysis of sucrose-6F-phosphate phosphohydrolase from plants. Proc. Natl. Acad. Sci. USA 97 (2000) 12914-12919. [PMID: 11050182]
3. Lunn, J.E. and MacRae, E. New complexities in the synthesis of sucrose. Curr. Opin. Plant Biol. 6 (2003) 208-214. [PMID: 12753969]
4. Fieulaine, S., Lunn, J.E., Borel, F. and Ferrer, J.L. The structure of a cyanobacterial sucrose-phosphatase reveals the sugar tongs that release free sucrose in the cell. Plant Cell 17 (2005) 2049-2058. [PMID: 15937230]