Palytoxin, PTX or PLTX is an intense vasoconstrictor, and is considered to be one of the most poisonous non-protein substances known, second only to maitotoxin in terms of toxicity in mice.
{{Chembox | Watchedfields = changed | verifiedrevid = 450619714 | ImageFile = Palytoxin.svg | ImageSize = 250px | ImageAlt = | PIN = (2S,3R,5R,6E,8R,9S)-10-[(12R,13R,15S,41R,43R,45S,46R,6R,7R,8Z,102R,103S,104R,105R,106R,12R,13R,14R,15S,19Z,22R,23S,24R,26E,28Z,30S,322S,323R,324R,325S,326R,34R,35R,372R,373S,374R,376S,38R,39R,42S,43E,45S,46S,482S,483R,484R,485R,486R,50S,581S,583S,585R,586R,60S,66R,67S,68S,69R,70S,712R,713S,714R,715R,716R)-15-(Aminomethyl)-13,6,7,103,104,105,13,14,15,22,23,24,30,323,324,325,34,35,373,374,38,39,42,46,482,483,484,485,50,66,67,68,69,70,713,714,715-heptatriacontahydroxy-12,45,583,585,60-pentamethyl-18-methylidene-44,47,587,588-tetraoxa-10,32,37,48(2,6),71(2)-pentakis(oxana)-1(2)-oxolana-4(6,3),58(1,6)-bis(bicyclo[3.2.1]octana)henheptacontaphane-8,19,26,28,43-pentaen-716-yl]-N-{(1E)-3-[(3-hydroxypropyl)amino]-3-oxoprop-1-en-1-yl}-2,5,8,9-tetrahydroxy-3,7-dimethyldec-6-enamide |Section1= |Section2= |Section3= }} Palytoxin, PTX or PLTX is an intense vasoconstrictor, and is considered to be one of the most poisonous non-protein substances known, second only to maitotoxin in terms of toxicity in mice.
Palytoxin is a polyhydroxylated and partially unsaturated compound (8 double bonds) with a long carbon chain. It has water-soluble and fat-soluble parts, 40 hydroxy groups and 64 chiral centers. Due to chirality and possible double bond cis-trans isomerism, it has over 1021 alternative stereoisomers. It is thermostable, and boiling contaminated seafood does not noticeably reduce toxicity. It remains stable in aqueous solutions for prolonged periods but rapidly decomposes in acidic or alkaline solutions. It has multiple analogues such as ostreocin-D, mascarenotoxin-A and -B.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).