Trehalulose

Last updated
Trehalulose
Trehalulose structure.png
Names
IUPAC name
1-O-α-D-Glucopyranosyl-D-fructose
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.051.967 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 257-183-7
KEGG
PubChem CID
UNII
  • InChI=1S/C12H22O11/c13-1-4(15)7(17)8(18)5(16)3-22-12-11(21)10(20)9(19)6(2-14)23-12/h4,6-15,17-21H,1-3H2/t4-,6-,7-,8-,9-,10+,11-,12+/m1/s1 Yes check.svgY
    Key: NMELTECMHKKXLF-DGQJZECASA-N
  • C(C1C(C(C(C(O1)OCC(=O)C(C(C(CO)O)O)O)O)O)O)O
Properties
C12H22O11
Molar mass 342.297 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Trehalulose is a disaccharide made up of a molecule of fructose bound to a molecule of glucose. Like isomaltulose, it is a structural isomer of sucrose that is present in small quantities in honey. [1] It makes up 50% of sugars in the honeydew of silverleaf whiteflies [2] [3] and is synthesised from sucrose by some bacteria, [4] [5] such as Protaminombacter rubrum. [6] [1] Because the anomeric carbon of the fructose moiety is not involved in the glycosidic bond, it is a reducing sugar. [6]

Contents

Physiology

Because the fructose and glucose molecules are linked by a 1,1 glycosidic bond, which is more stable than the 1,2 glycosidic bond in sucrose, it is broken down more slowly than sucrose in the small intestine, giving it a lower glycemic index. [6] This more stable bond also means that it cannot be utilised by Streptococcus mutans , and it is therefore non-cariogenic. [7]

Properties

Unlike isomaltulose, trehalulose strongly resists crystallisation, and forms an amorphous solid when dried. Its sweetness relative to sucrose has been estimated as between 0.4 [8] and 0.7. [9]

It has a specific rotation of °. [1]

Honey from stingless bees

In 2020 researchers at the University of Queensland found that some species of stingless bee in Australia, Malaysia, and Brazil produce honey containing between 13% and 44% trehalulose rather than the usual glucose and fructose. The university's findings supported the long-standing claims of Indigenous Australian people that native honey is beneficial for human health. [10] [11] In 2021 the same researchers discovered that the bees convert all sucrose from nectar into trehalulose. [12]

References

  1. 1 2 3 Wolfgang Gerhartz, ed. (1994). Ullmann's encyclopedia of industrial chemistry / Vol. A. Alphabetically arranged articles. 25, Starch and other polysaccharides to surfactants (5., completely rev ed.). Weinheim: VCH Verl.-Ges. pp. 426–427. ISBN   3-527-20125-4. OCLC   311987978.
  2. ↑ Salvucci, Michael E.; Wolfe, Gregory R.; Hendrix, Donald L. (1997-05-01). "Effect of sucrose concentration on carbohydrate metabolism in Bemisia argentifolii: Biochemical mechanism and physiological role for trehalulose synthesis in the silverleaf whitefly" . Journal of Insect Physiology. 43 (5): 457–464. doi:10.1016/S0022-1910(96)00124-2. ISSN   0022-1910.
  3. ↑ Dictionary of carbohydrates with CD-ROM. Collins, P. M. (2nd ed.). Boca Raton. 29 November 2005. p. 538. ISBN   0-8493-7765-X. OCLC   70262506.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: others (link)
  4. ↑ Hamerli, Dénes; Birch, Robert G. (2011). "Transgenic expression of trehalulose synthase results in high concentrations of the sucrose isomer trehalulose in mature stems of field-grown sugarcane". Plant Biotechnology Journal. 9 (1): 32–37. doi: 10.1111/j.1467-7652.2010.00528.x . ISSN   1467-7652. PMID   20492546.
  5. ↑ Tsuyuki, Ken'ichiro; Sugitani, Toshiaki; Miyata, Yukie; Ebashi, Tadishi; Nakajima, Yoshikazu (1992). "Isolation and characterization of isomaltulose- and trehalulose-producing bacteria from Thailand soil". The Journal of General and Applied Microbiology. 38 (5): 483–490. doi: 10.2323/jgam.38.483 . ISSN   1349-8037.
  6. 1 2 3 Rosenplenter, Kurt; Lipinski, Prof Dr Gert-Wolfhard von Rymon; Nöhle, Prof Dr Ulrich (2007-01-01). Handbuch Süßungsmittel (in German). Behr's Verlag DE. p. 258. ISBN   978-3-89947-947-8.
  7. ↑ Ooshima, T.; Izumitani, A.; Minami, T.; Fujiwara, T.; Nakajima, Y.; Hamada, S. (1991). "Trehalulose Does Not Induce Dental Caries in Rats Infected with Mutans Streptococci" . Caries Research. 25 (4): 277–282. doi:10.1159/000261376. ISSN   0008-6568. PMID   1913765.
  8. ↑ EP 0794259,Nishimoto, Tomoyuki; Chaen, Hiroto& Fukuda, Shigeharuet al.,"Process for producing a saccharide composition containing trehalulose",published 1997-09-10, assigned to Hayashibara Seibutsu Kagaku Kenkyujo KK
  9. ↑ Ravaud, Stéphanie; Watzlawick, Hildegard; Haser, Richard; Mattes, Ralf; Aghajari, Nushin (2005-01-01). "Expression, purification, crystallization and preliminary X-ray crystallographic studies of the trehalulose synthase MutB from Pseudomonas mesoacidophila MX-45". Acta Crystallographica Section F. 61 (1): 100–103. doi:10.1107/S1744309104030623. ISSN   1744-3091. PMC   1952383 . PMID   16508103.
  10. ↑ Layt, Stuart (2020-07-23). "Scientists say native stingless bee honey hits the sweet spot". Brisbane Times. Retrieved 2020-07-27.
  11. ↑ Fletcher, Mary T.; Hungerford, Natasha L.; Webber, Dennis; Carpinelli de Jesus, Matheus; Zhang, Jiali; Stone, Isobella S. J.; Blanchfield, Joanne T.; Zawawi, Norhasnida (2020-07-22). "Stingless bee honey, a novel source of trehalulose: a biologically active disaccharide with health benefits". Scientific Reports. 10 (1): 12128. Bibcode:2020NatSR..1012128F. doi: 10.1038/s41598-020-68940-0 . ISSN   2045-2322. PMC   7376065 . PMID   32699353.
  12. ↑ "Native bees make a healthy honey no others make, and now we know how". ABC News. 27 August 2021.
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