Imino acid
In
carboxyl (-C(=O)-OH) functional groups.[1]
-skeletal.svg)
Imino group attached to carbon
The two functional groups that together define an imino acid
Imino acids are structurally related to
amino group instead of imine—a difference of single vs double-bond between nitrogen and carbon. The simplest example is dehydroglycine
.
biosynthetic precursor to the amino acid proline
is the imino acid (S)-Δ1-pyrroline-5-carboxylate (P5C).
Related terminology
Secondary amino acids, amino acids containing a secondary amine group are sometimes named imino acids,[2][3] though this usage is obsolescent.[1] The only proteinogenic amino acid of this type is proline, although the related non-proteinogenic amino acids hydroxyproline[4][5][6] and pipecolic acid[7] have often been included in studies of this class of compounds.
The term imino acid is also the obsolete term for imidic acids, structures containing the -C(=NH)-OH group, and should not be used for them.[1]
References
- ^
- ^ Proline at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
- ^ "III. Amino Acids". Oklahoma State University. Archived from the original on 2008-01-18. Retrieved 2015-01-03.
- PMID 14061301.
- PMID 16656240.
- PMID 1122021.
- PMID 8448197.
External links
- imino+acids at the U.S. National Library of Medicine Medical Subject Headings (MeSH)
| General topics |  | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| By properties |
| ||||||||||
| |||||||||||