Detail of "24259-59-4"

CAS Number:
24259-59-4
Name:
L-Ribose
Superlist Name:
Ribose
Molecular Structure:
Formula:
C₅H₁₀O₅
Molecular Weight:
150.13
Synonyms:
Ribose, L-(8CI);(2S,3S,4S)-2,3,4,5-tetrahydroxypentanal;
EINECS:
246-110-4
Density:
1.508 g/cm³
Melting Point:
81-82 °C(lit.)
Boiling Point:
415.5 °C at 760 mmHg
Flash Point:
219.2 °C
Appearance:
white crystals or powder
Hazard Symbols:
Xi
Risk Codes:
36/37/38
Safety:
26-36 Details

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Reference

Microbial degradation of unnatural carbohydrates: Microbial degradation of unnatural carbohydrates. I. Degradation of eight pentoses by soil microorganisms.In this study， 24259-59-4 and 10323-20-3 are also used. Izumori, Ken; Hatabe, Juhji (Fac. Agric., Kagawa Univ., Mikicho 761-07, Japan). Kagawa Daigaku Nogakubu Gakujutsu Hokoku, 38(1), 5-10 (Japanese) 1986. CODEN: KDNGAC. ISSN: 0368-5128. DOCUMENT TYPE: Journal CA Section: 10 (Microbial Biochemistry) Section cross-reference(s): 19 The no.. of microbes in the soil was counted by the absorbance at 600 nm that could grow on one of the natural pentoses (D-ribose, L-arabinose, and D-xylose) and unnatural ones (L-ribose, D-arabinose, L-xylose, L-lyxose, and D-lyxose) as a sole C source. In 1 g of the garden and forest soils, about 105-106 bacteria were found that could utilize the individual pentose. However, in sea mud from Seto Inland Sea, u102-105 of pentose-utilizing bacteria were found, but no microbes were detd. that could grow on L-lyxose or L-ribose. Natural pentoses were generally degraded rapidly by soil organisms. On the other hand, unnatural ones were utilized more slowly, probably after some mutations. .

Strong inhibitory effect of furanoses and sugar lactones on b-galactosidase of Escherichia coli: Strong inhibitory effect of furanoses and sugar lactones on b-galactosidase of Escherichia coli. Huber, R. E.Several substances are used for example 24259-59-4 and 6027-89-0 which are their cas registry numbers.; Brockbank, R. L. (Dep. Chem., Univ. Calgary, Calgary, AB T2N 1N4, Can.). Biochemistry, 26(6), 1526-31 (English) 1987. CODEN: BICHAW. ISSN: 0006-2960. DOCUMENT TYPE: Journal CA Section: 7 (Enzymes) Various sugars and their lactones were tested for their inhibition of b-galactosidase of E. coli. L-Ribose, which in the furanose form has a hydroxyl configuration similar to that of D-galactose at positions equiv. to the 3- and 4-positions of D-galactose, was a very strong inhibitor, and D-lyxose, which in the furanose form also resembles D-galactose, was a much better inhibitor than expected. Structural comparisons precluded the pyranose forms of these sugars from being significant contributors to the inhibition, and inhibition at different temps. (at which there are different furanose concns.) strongly supported the conclusion that the furanose form is inhibitory. Studies with sugar derivs. that can only be in the furanose form also supported the conclusion. This is the 1st report on the inhibitory effect of furanoses on b-galactosidase. Lactones were also inhibitory. Every lactone tested was much more inhibitory than was its parent sugar. D-Galactonolactone was esp. good. Expts. indicated that it was D-galactono-1,5-lactone rather than D-galactono-1,4-lactone which was inhibitory. Inhibition of b-galactosidases from mammalian sources by lactones has been reported previously, but this is the 1st report of the effect on b-galactosidase from E. coli. Since furanoses in the envelope form are analogous (in some ways) to half-chair or sofa conformations and since lactones with 6-membered rings probably have half-chair or sofa conformations, the results indicate that b-galactosidase probably destabilizes its substrate into a planar conformation of some type and that the galactose in the transition state may, therefore, also be quite planar. The study also showed that the primary hydroxymethyl group of sugars can be either equatorial or axial without significantly affecting binding. .

Detail of "24259-59-4"

L-Ribose

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Reference