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4.A.2 The PTS Fructose-Mannitol (Fru) Family

The Fru family is a large and complex family which includes several sequenced fructose, mannose and mannitol-specific porters as well as several putative PTS porters of unknown specificities. The fructose porters of this family phosphorylate fructose on the 1-position. Those of family 4.6 phosphorylate fructose on the 6-position. As is true of other members of the PTS-GFL superfamily, the IIC domains of these permeases probably have a uniform 8 TMS topology (Nguyen et al., 2006).

The IIA, IIB and IIC domains of the fructose- and mannitol-specific porters are demonstrably homologous. The IIB and IIC domains of the fructose porters are only distantly related to the corresponding domains of the mannitol porters. The IIB and IIC domains of these porters are homologous to those of the Glc family (TC #4.A.1) (Chang et al., 2004). However, the structure of the IIA domain of the mannitol porter of E. coli has been determined, and it proved to possess an α2β2α3 secondary structure, a structure which is very different from the β-sandwich structure of IIAGlc. Further, the IIC domains of the mannitol and fructose porters are as dissimilar from each other as they are from the glucose (TC #4.A.1) or lactose (TC #4.A.3) families.

This family belongs to the: PTS-GFL Superfamily.

References associated with 4.A.2 family:

Araki N., Suzuki T., Miyauchi K., Kasai D., Masai E. and Fukuda M. (201). Identification and characterization of uptake systems for glucose and fructose in Rhodococcus jostii RHA1. J Mol Microbiol Biotechnol. 20(3):125-36. 21464575
Benchabane, H., L.A. Lortie, N.D. Buckley, L. Trahan, and M. Frenette. (2002). Inactivation of the Streptococcus mutans fxpC gene confers resistance to xylitol, a caries-preventive natural carbohydrate sweetener. J. Dent. Res. 81: 380-386. 12097428
Chang, A.B., R. Lin, W.K. Studley, C.V. Tran, and M.H. Saier, Jr. (2004). Phylogeny as a guide to structure and function of membrane transport proteins. Mol. Membrane Biol. 21: 171-181. 15204625
Gaurivaud, P., F. Laigret, E. Verdin, M. Garnier, and J.M. Bové. (2000). Fructose operon mutants of Spiroplasma citri. Microbiology 146(Pt9): 2229-2236. 10974110
Johnson, D.A., S.G. Tetu, K. Phillippy, J. Chen, Q. Ren, and I.T. Paulsen. (2008). High-throughput phenotypic characterization of Pseudomonas aeruginosa membrane transport genes. PLoS Genet 4: e1000211. 18833300
Kroon, G.J.A., J. Grötzinger, K. Dijkstra, R.M. Scheek and G.T. Robillard (1993). Backbone assignments and secondary structure of the Escherichia coli enzyme-II mannitol A domain determined by heteronuclear three-dimensional NMR spectroscopy. Prot. Sci. 2: 1331-1341. 8401218
Lee, H.Y., M. Magotra, T.Y. Wong, C. Chakraborty, and J.K. Liu. (2012). ATP-dependent fructose uptake system in Deinococcus radiodurans. Appl. Microbiol. Biotechnol. 93: 1241-1248. 21822900
Nguyen, T.X., M.R. Yen, R.D. Barabote, and M.H. Saier, Jr. (2006). Topological predictions for integral membrane permeases of the phosphoenolpyruvate:sugar phosphotransferase system. J. Mol. Microbiol. Biotechnol. 11: 345-360. 17114898
Pickl, A., U. Johnsen, and P. Schönheit. (2012). Fructose degradation in the haloarchaeon Haloferax volcanii involves bacterial type phosphoenolpyruvate-dependent phosphotransferase system, fructose-1-phosphate kinase and Class II fructose-1,6-bisphosphate aldolase. J. Bacteriol. [Epub: Ahead of Print] 22493022
Powell, B.S., D.L. Court, T. Inada, Y. Nakamura, V. Michotey, X. Cui, A. Reizer, M.H. Saier, Jr. and J. Reizer (1994). Novel proteins of the phosphotransferase system encoded within the rpoN operon of Escherichia coli. J. Biol. Chem 270: 4822-4839. 7876255
Reizer, J., A. Reizer, and M.H. Saier, Jr. (1995). Novel phosphotransferase system genes revealed by bacterial genome analysis--a gene cluster encoding a unique Enzyme I and the proteins of a fructose-like permease system. Microbiology 141(Pt4): 961-971. 7773398
Reizer, J., I.T. Paulsen, A. Reizer, F. Titgemeyer and M.H. Saier, Jr. (1996). Novel phosphotransferase system genes revealed by bacterial genome analysis: the complete complement of pts genes in Mycoplasma genitalium. Microbial Comp. Genomics. 1: 151-164. 9689210
Reizer, J., S. Bachem, A. Reizer, M. Arnaud, M.H. Saier, Jr., and J. Stülke. (1999). Novel phosphotransferase system genes revealed by genome analysis – the complete complement of PTS proteins encoded within the genome of Bacillus subtilis. Microbiology 145: 3419-3429. 10627040
Rouquet, G., G. Porcheron, C. Barra, M. Répérant, N.K. Chanteloup, C. Schouler, and P. Gilot. (2009). A metabolic operon in extraintestinal pathogenic Escherichia coli promotes fitness under stressful conditions and invasion of eukaryotic cells. J. Bacteriol. 191: 4427-4440. 19376853
Sampaio, M.M., F. Chevance, R. Dippel, T. Eppler, A. Schlegel, W. Boos, Y.J. Lu, and C.O. Rock. (2004). Phosphotransferase-mediated transport of the osmolyte 2-O-α-mannosyl-D-glycerate in Escherichia coli occurs by the product of the mngA (hrsA) gene and is regulated by the mngR (farR) gene product acting as repressor. J. Biol. Chem. 279: 5537-5548. 14645248
Shakeri-Garakani, A., A. Brinkkötter, K. Schmid, S. Turgut, and J.W. Lengeler. (2004). The genes and enzymes for the catabolism of galactitol, D-tagatose, and related carbohydrates in Klebsiella oxytoca M5a1 and other enteric bacteria display convergent evolution. Mol. Genet. Genomics 271: 717-728. 15257457
Sugiyama, J.E., S. Mahmoodian and G.R. Jacobson (1991). Membrane topology analysis of Escherichia coli mannitol permease by using a nested-deletion method to create mtlA phoA fusions. Proc. Natl. Acad. Sci. USA 88: 9603-9607. 1946374
Tanzer, J.M., A. Thompson, Z.T. Wen, and R.A. Burne. (2006). Streptococcus mutans: fructose transport, xylitol resistance, and virulence. J. Dent. Res. 85: 369-373. 16567561
Wen, Z.T., C. Browngardt, and R.A. Burne. (2001). Characterization of two operons that encode components of fructose-specific enzyme II of the sugar:phosphotransferase system of Streptococcus mutans. FEMS Microbiol. Lett. 205: 337-342. 11750824