Colominic acid sodium salt (Polysialic acid sodium salt) could be naturally isolated from the cell wall of Escherichia coli and animals, gives a red color which has an absorption maximum at 530 nm. Colominic acid sodium salt (Polysialic acid sodium salt) possesses anti-bacterial activity.
Colominic acid (Polysialic acid) is an form of N-glycosylation with great specificity for its limited central nervous system targets, including the cell adhesion molecules neural cell adhesion molecule (NCAM) and synaptic cell adhesion molecule 1 (SynCAM1), and the receptor, neuropilin-2[2].
[1]. Guy T. Barry, et al. COLOMINIC ACID, A POLYMER OF N-ACETYLNEURAMINIC ACID. J Exp Med. 1958 Apr 1;107(4):507-21.
[2]. Osama I Alwassil, et al. Design, synthesis, and structural elucidation of novel NmeNANAS inhibitors for the treatment of meningococcal infection. PLoS One. 2019 Oct 16;14(10):e0223413.