Lycopene

Lycopene is a naturally occurring red carotenoid pigment with the molecular formula C₄₀H₅₆ and a molecular weight of approximately 536.9 g/mol. It is a symmetrical tetraterpene composed of eight isoprene units arranged in an acyclic open-chain structure containing 13 double bonds—11 of which are conjugated—giving it strong antioxidant properties and its characteristic deep red color[1][3][4]. Lycopene is highly lipophilic and insoluble in water but soluble in organic solvents such as hexane and chloroform. It occurs predominantly in the all-trans form in nature but can exist as various cis-isomers due to light or heat-induced isomerization[3][5]. Found abundantly in tomatoes and other red fruits like watermelon and pink grapefruit, lycopene acts primarily as an antioxidant by quenching singlet oxygen and neutralizing free radicals more efficiently than many other carotenoids or vitamin E[1][4]. Unlike some related carotenoids such as beta-carotene, lycopene does not have provitamin A activity because it lacks terminal beta-ionone rings[4]. Epidemiological studies suggest that higher dietary intake of lycopene may be associated with reduced risk for certain cancers (notably prostate cancer) and cardiovascular diseases; however, lycopene itself does not act on a specific therapeutic target such as a receptor or enzyme—it functions through general antioxidative mechanisms rather than direct modulation of biological targets typically considered "therapeutic targets" in pharmacology[8]. Note: Lycopene itself is not considered a therapeutic target like receptors or enzymes; rather it is a bioactive compound/nutrient with health-related effects via its chemical properties. Thus "is_target" should be marked false; "is_incorrect" should be true if the intent was to identify druggable protein/nucleic acid targets rather than nutrients or small molecule antioxidants.

Other names

all-trans-lycopeneΨ,Ψ-carotenepsi,psi-carotenetrans-lycopene9-cis-lycopene (for isomer)(all-E)-lycopene[6][9]

Scavenges reactive oxygen species and singlet oxygen as an antioxidant[1][4]