core pentasaccharide N-glycan moiety

IRI: https://spec.industrialontologies.org/ontology/construct/CorePentasaccharideNGlycanMoiety

Defined In: https://spec.industrialontologies.org/ontology/biopharma/MolecularEntity/

SubClass Of: N-glycan moiety

Class Hierarchy

owl:Thing › bfo:entity › bfo:continuant › bfo:independent continuant › bfo:material entity › chemical moiety › N-glycan moiety › core pentasaccharide N-glycan moiety

Direct subclasses:

• biantennary complex N-glycan moiety
• high mannose N-glycan moiety
• hybrid N-glycan moiety

Definition

N-glycan moiety that contains the core pentasaccharide Man₃GlcNAc₂, consisting of a di-N-acetyl-chitobiose unit extended by a branched mannose trisaccharide

Explanatory Notes

1) This class represents the canonical core structure of N-glycan moieties commonly encountered in biopharmaceutical glycoproteins, including monoclonal antibodies and other recombinant proteins. These moieties share the conserved chitobiose core and branched mannose structure that define common N-glycan families, including high-mannose, hybrid, and complex glycoforms routinely monitored in industry analytics. This structural pattern underlies standard glycan annotations such as G0F, G1F, G2F, and high-mannose species. 2) In canonical eukaryotic protein N-glycosylation, core pentasaccharide N-glycan moieties are attached to L-asparagine residues. This is reflected in the necessary condition that this moiety is a proper continuant part of some N4-glycosyl-L-asparagine.

Examples

• Core pentasaccharide N-glycan moiety in a monoclonal antibody Fc N-glycan; Core Man₃GlcNAc₂ moiety shared by G0F, G1F, and G2F Fc glycoforms; Core pentasaccharide N-glycan moiety in a high-mannose glycan on a recombinant glycoprotein.

Adapted From

• https://www.sigmaaldrich.com/RS/en/technical-documents/technical-article/protein-biology/protein-labeling-and-modification/n-glycans and https://pmc.ncbi.nlm.nih.gov/articles/PMC9781892/

Primitive Class

This class is declared primitive and it does not have necessary and sufficient condiftions defined.

Primitive Rationale

This term is expected to remain primitive as the detailed treatment of chemical bonds, structure and formation is outside of the current scope of IOF. Other biological and chemical ontologies should be used for these purposes

Formal Axioms

First-Order Logic Axioms

CorePentasaccharideNGlycanMoiety(x) → NGlycanMoiety(x) ∧ ∃y (properContinuantPartOfAtAllTimes(x, y) ∧ N4GlycosylLAsparagine(y))

Semi-Formal Natural Language Axioms

if x is a ‘core pentasaccharide N-glycan moiety’ then x is an ‘N-glycan moiety’ and x is a ‘proper continuant part of at all times’ some ‘N4-glycosyl-L-asparagine’

Description Logic

constr:CorePentasaccharideNGlycanMoiety ⊑ constr:NGlycanMoiety

constr:CorePentasaccharideNGlycanMoiety ⊑ ∃ bfo:proper_continuant_part_of_at_all_times .constr:N4GlycosylLAsparagine

SubClassOf: constr:NGlycanMoiety

SubClassOf: bfo:proper_continuant_part_of_at_all_times some constr:N4GlycosylLAsparagine