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International Union of Biochemistry and Molecular Biology
International Union of Pure and Applied Chemistry
Chemical Nomenclature and Structure
IUBMB-IUPAC Joint Commission on Biochemical Nomenclature
Nomenclature of Cyclic Peptides
These recommendations extend rule 3AA-19.5 of the Nomenclature
and Symbolism for Amino Acids and Peptides (Recommendations 1983)
to cover all classes of cyclic peptides. They include rings generated
from an acyclic peptide by formation of a peptide or ester bond; by
a disulfide link; or by a new carbon carbon, carbon-nitrogen, nitrogen-oxygen
or carbon-sulfur bond (not esters or amides). These new bonds are
indicated by the prefix anhydro, cyclo or epoxy, or combinations of
them. The inclusion of modified standard amino acids or amino acids
not related to standard amino acids is considered. Any stereochemistry
generated by ring formation is indicated using standard organic conventions.
> Download full text of the Provisional Recommendations
(pdf file - 374KB)
Comments by 31 March 2005
To Dr. Gerard P. Moss
Queen Mary, University of London
Department of Chemistry
Mile End Road
London, E1 4NS
TEL: + (20) 7882 3262
FAX: + (20) 7882 7794
> Project Description
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