The amino acid composition of the proteinaceous component of gum karaya(Sterculiaspp.)∗

Comparative amino acid and fatty acid compositions of edible gums kondagogu (Cochlospermum gossypium) and karaya (Sterculia urens)

“…Certain amino acids, such as, alanine, valine, methionine, tyrosine and tryptophan, were not detected in gum karaya as they were in gum kondagogu (Table 2). Earlier, Anderson et al (1985a) reported the presence of aspartic acid and glutamic acid in karaya gum, which is re-confirmed by the present investigation, using GC-MS. Interestingly, the aspartic acid content (72.8 ± 3.45 lg/g) of gum kondagogu was higher than that of gum karaya (64.2 ± 2.44 lg/g). Previous studies indicated the presence of amino acids such as leucine, glutamic acid, proline, valine, serine, glycine and threonine in Sterculia villosa, Sterculia setigera and Sterculia spp.…”

“…Gum karaya, contains 1.2 ± 0.59% of a proteinaceous component (Anderson, Howlett, & McNab, 1985a, 1985bJanaki & Sashidhar, 1998), whereas gum kondagogu has been reported to have 6.3 ± 1.11% of a proteinaceous component (Janaki & Sashidhar, 1998). However, a detailed comparative profiling of the amino acids after protein hydrolysis in these gums has not been documented in the contemporary literature.…”

“…Previous studies indicated the presence of amino acids such as leucine, glutamic acid, proline, valine, serine, glycine and threonine in Sterculia villosa, Sterculia setigera and Sterculia spp. gums (Anderson et al, 1985a;Anderson et al, 1985b). Therefore, there are considerable differences between the amino acid compositions of the gums from S. urens (gum karaya) and C. gossypium (gum kondagogu), even though they do not differ greatly in terms of their polysaccharide composition.…”

“…histidine, isoleucine, phenylalanine, threonine, tyrosine and valine were remarkably constant (Anderson et al, 1985c). Anderson et al (1985a) suggested that the amino acid profile of gums provides a useful analytical supplement to sugar determinations in the analysis of gums. The high uronic acid and aspartic acid contents of gum kondagogu make it a more acidic gum than karaya (Vinod, Sashidhar, Sarma, et al, 2008).…”

Green Synthesis: Nanoparticles and Nanofibres Based on Tree Gums for Environmental Applications

“…Hydrocolloids are some of the most well-known polysaccharides, having complex structures with glycosidic bonding. Most gums are heterogeneous polysaccharides with complicated structures and extremely high molecular masses [69][70][71]. The simplest interactions of hydrocolloids are (as the name suggest) with water and it is this interaction that is key to their use in foodstuffs.…”