[125I]orexin A (human, mouse, rat)   Click here for help

GtoPdb Ligand ID: 3798

Synonyms: [125I]-orexin A
 Ligand is labelled  Ligand is radioactive
Compound class: Peptide or derivative
Comment: A radiolabelled version of orexin-A. Its useful working concentration is in the subnanomolar - low nanomolar range [1-3]. The iodine label of the commercial product is mostly in the tyrosine ring (not shown in the ligand image).
2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

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Canonical SMILES NCCCCC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NCC(=O)NC(C(=O)NCC(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)NCC(=O)NC(C(=O)NC(C(=O)NC(C(=O)NC(C(=O)N)CC(C)C)C(O)C)CC(C)C)C(CC)C)C)C)Cc1nc[nH]c1)CC(=O)N)C)Cc1nc[nH]c1)CC(C)C)CC(C)C)CCC(=O)O)Cc1ccc(cc1)O)CC(C)C)CCCN=C(N)N)CS)CO)CS)C(O)C)NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C(NC(=O)C1CCCN1C(=O)C(NC(=O)C1CCCN1C(=O)C1CCC(=O)N1)CC(C)C)CC(=O)O)CS)CS)CCCN=C(N)N)CCC(=O)N
Isomeric SMILES CC[C@H](C)[C@H](NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](C)NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@H](CC(N)=O)NC(=O)CNC(=O)[C@H](C)NC(=O)CNC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCC(=O)O)NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CS)NC(=O)[C@H](CO)NC(=O)[C@H](CS)NC(=O)[C@@H](NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCC(N)=O)NC(=O)[C@H](CCCN=C(N)N)NC(=O)[C@H](CS)NC(=O)[C@H](CS)NC(=O)[C@H](CC(=O)O)NC(=O)[C@@H]1CCCN1C(=O)[C@H](CC(C)C)NC(=O)[C@@H]1CCCN1C(=O)[C@@H]1CCC(=O)N1)[C@@H](C)O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@H](C(=O)N[C@@H](CC(C)C)C(N)=O)[C@@H](C)O
InChI InChI=1S/C152H247N47O44S4/c1-20-76(14)118(146(239)188-96(51-74(10)11)138(231)197-119(80(18)201)147(240)180-92(121(156)214)47-70(2)3)195-115(209)62-166-123(216)78(16)171-124(217)79(17)172-131(224)99(55-84-59-162-69-169-84)186-136(229)100(56-111(155)205)174-114(208)61-165-122(215)77(15)170-113(207)60-167-125(218)98(54-83-58-161-68-168-83)185-134(227)95(50-73(8)9)183-132(225)93(48-71(4)5)182-129(222)90(38-41-116(210)211)179-135(228)97(53-82-32-34-85(203)35-33-82)184-133(226)94(49-72(6)7)181-127(220)88(29-24-44-164-152(159)160)177-140(233)104(64-244)192-139(232)103(63-200)190-142(235)107(67-247)194-148(241)120(81(19)202)196-130(223)86(27-21-22-42-153)175-128(221)89(36-39-110(154)204)178-126(219)87(28-23-43-163-151(157)158)176-141(234)105(65-245)193-143(236)106(66-246)191-137(230)101(57-117(212)213)187-144(237)108-30-26-46-199(108)150(243)102(52-75(12)13)189-145(238)109-31-25-45-198(109)149(242)91-37-40-112(206)173-91/h32-35,58-59,68-81,86-109,118-120,200-203,244-247H,20-31,36-57,60-67,153H2,1-19H3,(H2,154,204)(H2,155,205)(H2,156,214)(H,161,168)(H,162,169)(H,165,215)(H,166,216)(H,167,218)(H,170,207)(H,171,217)(H,172,224)(H,173,206)(H,174,208)(H,175,221)(H,176,234)(H,177,233)(H,178,219)(H,179,228)(H,180,240)(H,181,220)(H,182,222)(H,183,225)(H,184,226)(H,185,227)(H,186,229)(H,187,237)(H,188,239)(H,189,238)(H,190,235)(H,191,230)(H,192,232)(H,193,236)(H,194,241)(H,195,209)(H,196,223)(H,197,231)(H,210,211)(H,212,213)(H4,157,158,163)(H4,159,160,164)/t76-,77-,78-,79-,80+,81+,86-,87-,88-,89-,90-,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,102-,103-,104-,105-,106-,107-,108-,109-,118-,119-,120-/m0/s1
InChI Key IXODJSWYPSZUCI-IIIOAANCSA-N
Bioactivity Comments
The binding affinity of [125I]orexin A is likely to be similar to that exhibited by the unlabelled molecule, orexin-A.
Selectivity at GPCRs
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
OX1 receptor Hs None - - - - 1-3
⤷ Useful working concentration sub nM-low nM. [1-3]
OX2 receptor Hs None - - - - 1-3
⤷ Useful working concentration sub nM-low nM. [1-3]
Ligand mentioned in the following text fields
Orexin receptors comments