Perosamine

Perosamine

Names
IUPAC name (2S,3S,4R,5R)-4-amino-2,3,5-trihydroxyhexanal
Other names 4-Amino-4,6-dideoxy-D-mannose
Identifiers
CAS Number	31348-80-8
ChemSpider	142026
Jmol interactive 3D	Image
PubChem	161706
InChI InChI=1S/C6H13NO4/c1-3(9)5(7)6(11)4(10)2-8/h2-6,9-11H,7H2,1H3/t3-,4-,5-,6-/m1/s1 Key: UEHGPSGGFKLPTD-KVTDHHQDSA-N InChI=1/C6H13NO4/c1-3(9)5(7)6(11)4(10)2-8/h2-6,9-11H,7H2,1H3/t3-,4-,5-,6-/m1/s1 Key: UEHGPSGGFKLPTD-KVTDHHQDBX
SMILES C[C@H]([C@H]([C@@H]([C@@H](C=O)O)O)N)O
Properties
Chemical formula	C6H13NO4
Molar mass	163.172 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Perosamine (or GDP-perosamine) is a mannose-derived 4-aminodeoxysugar produced by some bacteria.

Biological role

N-acetyl-perosamine is found in the O-antigen of Gram-negative bacteria such as Vibrio cholerae O1, E. coli O157:H7 and Caulobacter crescentus CB15.^[1] The sugar is also found in perimycin, an antibiotic produced by the Gram-positive organism Streptomyces coelicolor var. aminophilus.^[2]

Biosynthesis

Its biosynthesis from mannose-1-phosphate follows a pathway similar to that of colitose, but is different in that it is aminated and does not undergo 3-OH deoxygenation or C-5 epimerization.^[3]

GDP-4-keto-6-deoxymannose-4-aminotransferase (GDP-perosamine synthase)

GDP-perosamine synthase is a PLP-dependent enzyme that transfers a nitrogen from glutamate to the 4-keto position of GDP-4-keto-6-deoxymannose during the biosynthesis of GDP-perosamine.^[1]

References

1. Samuel G, Reeves P (2003). "Biosynthesis of O-antigens: genes and pathways involved in nucleotide sugar precursor synthesis and O-antigen assembly". Carbohydr. Res. 338 (23): 2503–19. doi:10.1016/j.carres.2003.07.009. PMID 14670712.
2. Pawlak J, Sowiński P, Borowski E, Gariboldi P (September 1995). "Stereostructure of perimycin A". J. Antibiot. 48 (9): 1034–8. doi:10.7164/antibiotics.48.1034. PMID 7592049. Retrieved 2010-01-24.
3. Albermann C, Piepersberg W (August 2001). "Expression and identification of the RfbE protein from Vibrio cholerae O1 and its use for the enzymatic synthesis of GDP-D-perosamine". Glycobiology 11 (8): 655–61. doi:10.1093/glycob/11.8.655. PMID 11479276. Retrieved 2010-01-24.