Record Information
Version1.0
StatusDetected and Quantified
Creation Date2021-11-18 00:08:36 UTC
Update Date2022-08-31 17:51:17 UTC
Metabolite IDMMDBc0030446
Metabolite Identification
Common NameRetinal
DescriptionA carotenoid constituent of visual pigments. It is the oxidized form of retinol which functions as the active component of the visual cycle. It is bound to the protein opsin forming the complex rhodopsin. When stimulated by visible light, the retinal component of the rhodopsin complex undergoes isomerization at the 11-position of the double bond to the cis-form; this is reversed in 'dark' reactions to return to the native trans-configuration.; Retinal, also called retinaldehyde or vitamin A aldehyde, is one of the many forms of vitamin A (the number of which varies from species to species). Retinal is a polyene chromophore, and bound to proteins called opsins, is the chemical basis of animal vision. Bound to proteins called type 1 rhodopsins, retinal allows certain microorganisms to convert light into metabolic energy.; The visual cycle is a circular enzymatic pathway, which is the front-end of phototransduction. It regenerates 11-cis-retinal.; Vertebrate animals ingest retinal directly from meat, or produce retinal from one of four carotenoids (beta-carotene, alpha-carotene, gamma-carotene, and beta-cryptoxanthin), which they must obtain from plants or other photosynthetic organisms (no other carotenoids can be converted by animals to retinal, and some carnivores cannot convert any carotenoids at all). The other main forms of vitamin A, retinol, and a partially active form retinoic acid, may both be produced from retinal.; catalyzed by retinal dehydrogenases also known as retinaldehyde dehydrogenases (RALDHs) as well as retinal oxidases. Retinoic acid, sometimes called vitamin A acid, is an important signaling molecule and hormone in vertebrate animals.
Structure
Synonyms
ValueSource
all-trans-RetinaldehydeChEBI
all-trans-RetineneChEBI
all-trans-Vitamin a aldehydeChEBI
RetinaldehydeChEBI
RetineneChEBI
Vitamin a aldehydeChEBI
all-trans-RetinalKegg
Aldehyde, vitamin aHMDB
AxerophthalHMDB
11 cis RetinalHMDB
11-cis-RetinalHMDB
3,7-Dimethyl-9-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4,6,8-nonatetraenalHMDB
all-e-RetinalHMDB
all-epsilon-RetinalHMDB
alpha-RetineneHMDB
e-RetinalHMDB
epsilon-RetinalHMDB
Retinene 1HMDB
trans-RetinalHMDB
trans-Vitamin a aldehydeHMDB
Vitamin a1 aldehydeHMDB
Molecular FormulaC20H28O
Average Mass284.4357
Monoisotopic Mass284.214015518
IUPAC Name(2E,4E,6E,8E)-3,7-dimethyl-9-(2,6,6-trimethylcyclohex-1-en-1-yl)nona-2,4,6,8-tetraenal
Traditional Nameretinaldehyde
CAS Registry Number116-31-4
SMILES
C\C(\C=C\C=C(/C)\C=C\C1=C(C)CCCC1(C)C)=C/C=O
InChI Identifier
InChI=1S/C20H28O/c1-16(8-6-9-17(2)13-15-21)11-12-19-18(3)10-7-14-20(19,4)5/h6,8-9,11-13,15H,7,10,14H2,1-5H3/b9-6+,12-11+,16-8+,17-13+
InChI KeyNCYCYZXNIZJOKI-OVSJKPMPSA-N