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Cytidine-5′-monophospho-N-acetylneuraminic acid sodium salt

≥85% (HPLC)

CMP-NAN, CMP-NANA, CMP-Neu5Ac, CMP-Sialic acid
Linear Formula:
CAS Number:
Molecular Weight:
MDL number:
PubChem Substance ID:


≥85% (HPLC)



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InChI key


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General description

Cytosine 5′-monophosphate N-acetylneuraminic acid (CMP-Neu5Ac) is a sugar-nucleotide produced by CMP-Neu5Ac synthetase from CTP and Neu5Ac.


Cytidine-5′-monophospho-N-acetylneuraminic acid sodium salt has been used:
  • as a standard in high-performance anion-exchange chromatography with pulsed amperometric detection (HPAEC-PAD) for nucleotide sugar analysis in Joubert syndrome type 10 (JBTS10) patient cells and control skin fibroblasts,
  • As a substrate for the enzymatic sialylation of G2 glycoforms, resialylation assay,
  • in in-vitro sialyltransferase assay

Biochem/physiol Actions

Cytidine-5′-monophospho-N-acetylneuraminic acid (CMP-Sialic acid) is a substrate for sialyltransferases. It is used for the enzymatic sialylation of glycans.
Cytosine 5′-monophosphate N-acetylneuraminic acid (CMP-Neu5Ac) is used as a substrate for Golgi sialyltransferases to form sialic acid and its conjugates.

Preparation Note

Enzymatically prepared by the method of Schauer, R., et al., Hoppe Seyler′s Z. Physiol. Chem., 353, 883 (1972).
CMP-NAN is very acid-labile.

Storage Class Code

11 - Combustible Solids



Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Masatoshi Suganuma et al.
Journal of bioscience and bioengineering, 126(1), 9-14 (2018-02-13)
A silkworm-baculovirus system is particularly effective for producing recombinant proteins, including glycoproteins. However, N-glycan structures in silkworm differ from those in mammals. Glycoproteins in silkworm are secreted as pauci-mannose type N-glycans without sialic acid or galactose residues. Sialic acid on
Francesca Necchi et al.
PloS one, 12(2), e0172163-e0172163 (2017-02-14)
Serum Bactericidal Activity (SBA) assay is the method of choice to evaluate the complement-mediated functional activity of both infection- and vaccine-induced antibodies. To perform a typical SBA assay, serial dilutions of sera are incubated with target bacterial strains and complement.
Christian Lizak et al.
Scientific reports, 7(1), 5842-5842 (2017-07-21)
Polysialic acid (polySia) is a homopolymeric saccharide that is associated with some neuroinvasive pathogens and is found on selective cell types in their eukaryotic host. The presence of a polySia capsule on these bacterial pathogens helps with resistance to phagocytosis
Magali Audry et al.
Glycobiology, 21(6), 716-726 (2010-11-26)
Sialyltransferases (STs) represent an important group of enzymes that transfer N-acetylneuraminic acid (Neu5Ac) from cytidine monophosphate-Neu5Ac to various acceptor substrates. In higher animals, sialylated oligosaccharide structures play crucial roles in many biological processes but also in diseases, notably in microbial
Gillian Dekkers et al.
Frontiers in immunology, 8, 877-877 (2017-08-22)
Glycosylation of the immunoglobulin G (IgG)-Fc tail is required for binding to Fc-gamma receptors (FcγRs) and complement-component C1q. A variety of IgG1-glycoforms is detected in human sera. Several groups have found global or antigen-specific skewing of IgG glycosylation, for example


Glycosyltransferases: Tools for Synthesis and Modification of Glycans

The presence of multiple functional groups and stereocenters in complex carbohydrates makes them challenging targets for the organic chemist.


Glycosyltransferases were initially considered to be specific for a single glycosyl donor and acceptor, which led to the one enzyme-one linkage concept. Subsequent observations have refuted the theory of absolute enzymatic specificity by describing the transfer of analogs of some nucleoside mono- or diphosphate sugar donors.

Sialic Acid

Review article and products for sialic acid synthesis and signaling.

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