Conantokin-T

Conantokin-T

Non-competitive NMDA receptor antagonist (IC50 = 0.4 μM) that inhibits Ca2+ influx and glutamate-induced toxicity in central nervous system neurons.

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CAT No: R1007

CAS No: 127476-26-0

Synonyms/Alias: Conatokin t

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M.F/Formula	C110H175N31O45S
M.W/Mr.	2683.8
Sequence	H-Gly-Glu-Gla-Gla-Tyr-Gln-Lys-Met-Leu-Gla-Asn-Leu-Arg-Gla-Ala-Glu-Val-Lys-Lys-Asn-Ala-NH2
Labeling Target	NMDA receptor
Appearance	White lyophilised solid
Purity	>98%
Activity	Antagonist

InChI	InChI=1S/C110H175N31O45S/c1-47(2)37-66(94(163)128-61(20-16-35-121-110(119)120)87(156)135-69(40-54(102(171)172)103(173)174)92(161)123-51(8)83(152)125-64(27-30-80(149)150)91(160)141-81(49(5)6)101(170)131-60(19-12-15-34-113)85(154)126-59(18-11-14-33-112)86(155)139-73(44-76(116)144)93(162)122-50(7)82(118)151)133-100(169)74(45-77(117)145)140-99(168)72(43-57(108(183)184)109(185)186)137-95(164)67(38-48(3)4)132-90(159)65(31-36-187-9)130-84(153)58(17-10-13-32-111)127-89(158)63(25-28-75(115)143)129-96(165)68(39-52-21-23-53(142)24-22-52)134-97(166)71(42-56(106(179)180)107(181)182)138-98(167)70(41-55(104(175)176)105(177)178)136-88(157)62(26-29-79(147)148)124-78(146)46-114/h21-24,47-51,54-74,81,142H,10-20,25-46,111-114H2,1-9H3,(H2,115,143)(H2,116,144)(H2,117,145)(H2,118,151)(H,122,162)(H,123,161)(H,124,146)(H,125,152)(H,126,154)(H,127,158)(H,128,163)(H,129,165)(H,130,153)(H,131,170)(H,132,159)(H,133,169)(H,134,166)(H,135,156)(H,136,157)(H,137,164)(H,138,167)(H,139,155)(H,140,168)(H,141,160)(H,147,148)(H,149,150)(H,171,172)(H,173,174)(H,175,176)(H,177,178)(H,179,180)(H,181,182)(H,183,184)(H,185,186)(H4,119,120,121)/t50-,51-,58-,59-,60-,61-,62-,63-,64-,65-,66-,67-,68-,69-,70-,71-,72-,73-,74-,81-/m0/s1
InChI Key	UFVIUSQQHPISRQ-HNJXWIPGSA-N
Isomeric SMILES	C[C@@H](C(=O)N)NC(=O)[C@H](CC(=O)N)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCCCN)NC(=O)[C@H](C(C)C)NC(=O)[C@H](CCC(=O)O)NC(=O)[C@H](C)NC(=O)[C@H](CC(C(=O)O)C(=O)O)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CC(=O)N)NC(=O)[C@H](CC(C(=O)O)C(=O)O)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCSC)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCC(=O)N)NC(=O)[C@H](CC1=CC=C(C=C1)O)NC(=O)[C@H](CC(C(=O)O)C(=O)O)NC(=O)[C@H](CC(C(=O)O)C(=O)O)NC(=O)[C@H](CCC(=O)O)NC(=O)CN
BoilingPoint	N/A
References	Conatokins-T, a 21-animo acid peptide which induces sleep-like symptoms in young mice was purified from the venom of the fish-hunting cone snail, Conus tulipa. The amino acid sequence of the peptide was determined and verified by chemical synthesis. The peptide has 4 residues of the modified amino acid, ycarboxyglutamate (Gla). The sequence of the peptide is: Gly-Glu-Gla-GIa-Tyr-Gln-Lys-Met-Leu-Gla-AsnLeu-Arg-Gla-Ala-Glu-Val-Lys-Lys-Asn-Ala-NHz. Conantokin-T inhibits N-methyl-D-aspartate (NMDA) receptor-mediated calcium influx in central nervous system neurons. This observation suggests that like conantokin-G (a homologous Conus peptide with recently identified NMDA antagonist activity) conantokin-T has NMDA antagonist activity. A sequence comparison of conantokins-T and -G identifies the 4 GIa residues and the N-terminal dipeptide sequence as potential key elements for the biological activity of this peptide. Conantokin-T. A gamma-carboxyglutamate containing peptide with N-methyl-d-aspartate antagonist activity Conantokin-T (Con-T), which contains four Gla residues, is a 21-residue peptide isolated from C. tulipa venoms, sharing about 40% sequence homology with Con-G. Both Con-G and Con-T in-duce a sleeping effect in young mice but hyperactive behaviour in old mice when administered by intracranial injection. Role of modified glutamic acid in the helical structure of conantokin-T
Melting Point	N/A

1. Tachykinin-related peptides modulate immune-gene expression in the mealworm beetle Tenebrio molitor L

2. Implications of ligand-receptor binding kinetics on GLP-1R signalling

3. Autoinhibition and phosphorylation-induced activation of phospholipase C-γ isozymes

4. Multifunctional peptide-oligonucleotide conjugate promoted sensitive electrochemical biosensing of cardiac troponin I

5. Effect of Short-Term Desiccation, Recovery Time, and CAPA-PVK Neuropeptide on the Immune System of the Burying Beetle Nicrophorus vespilloides

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