(3S)-3-[(2S)-2-[(2S)-2-{[(1R,4S,7S,10S,13S,16S,19S,22S,25R,28S,31R,36R,39S,42S,45S)-31-amino-7,22-bis(4-aminobutyl)-39-benzyl-4-(2-carboxyethyl)-10,19-bis(carboxymethyl)-13-[(1R)-1-hydroxyethyl]-28-(hydroxymethyl)-42-[(4-hydroxyphenyl)methyl]-45-(2-methylpropyl)-16-[2-(methylsulfanyl)ethyl]-3,6,9,12,15,18,21,24,27,30,38,41,44,47-tetradecaoxo-33,34,49,50-tetrathia-2,5,8,11,14,17,20,23,26,29,37,40,43,46-tetradecaazabicyclo[23.22.4]henpentacontan-36-yl]formamido}-3-(1H-imidazol-4-yl)propanamido]-4-carbamoylbutanamido]-3-{[(1S)-1-{[(1S,2S)-1-{[(1S)-1-carboxy-2-(1H-indol-3-yl)ethyl]carbamoyl}-2-methylbutyl]carbamoyl}-2-methylpropyl]carbamoyl}propanoic acid

• ChemBase ID: 133849
• Molecular Formular: C110H159N27O34S5
• Molecular Mass: 2563.92496
• Monoisotopic Mass: 2562.0146303
• SMILES: CC[C@H](C)[C@@H](C(=O)N[C@@H](Cc1c[nH]c2c1cccc2)C(=O)O)NC(=O)[C@H](C(C)C)NC(=O)[C@H](CC(=O)O)NC(=O)[C@H](CCC(=O)N)NC(=O)[C@H](Cc1c[nH]cn1)NC(=O)[C@@H]1CSSC[C@@H](C(=O)N[C@H](C(=O)N[C@H]2CSSC[C@@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N1)Cc1ccccc1)Cc1ccc(cc1)O)CC(C)C)NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC2=O)CCCCN)CC(=O)O)CCSC)[C@@H](C)O)CC(=O)O)CCCCN)CCC(=O)O)CO)N
• Canonical SMILES: NCCCC[C@@H]1NC(=O)[C@@H]2CSSC[C@H](NC(=O)[C@H](CCC(=O)O)NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)[C@@H](NC1=O)CC(=O)O)CCSC)[C@H](O)C)CC(=O)O)CCCCN)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](Cc1ccc(cc1)O)C(=O)N[C@H](C(=O)N[C@@H](CSSC[C@@H](C(=O)N[C@H](C(=O)N2)CO)N)C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@H](C(=O)O)Cc1c[nH]c2c1cccc2)[C@H](CC)C)C(C)C)CC(=O)O)CCC(=O)N)Cc1c[nH]cn1)Cc1ccccc1
• InChI: InChI=1S/C110H159N27O34S5/c1-9-55(6)88(108(168)130-77(110(170)171)40-59-45-116-64-22-14-13-21-62(59)64)136-107(167)87(54(4)5)135-102(162)76(44-86(148)149)128-93(153)67(29-31-82(114)141)121-99(159)73(41-60-46-115-52-117-60)126-106(166)81-49-174-173-48-63(113)90(150)131-78(47-138)103(163)134-79-50-175-176-51-80(105(165)123-70(37-53(2)3)96(156)124-72(39-58-25-27-61(140)28-26-58)97(157)125-71(98(158)133-81)38-57-19-11-10-12-20-57)132-94(154)68(30-32-83(142)143)120-91(151)65(23-15-17-34-111)118-101(161)75(43-85(146)147)129-109(169)89(56(7)139)137-95(155)69(33-36-172-8)122-100(160)74(42-84(144)145)127-92(152)66(119-104(79)164)24-16-18-35-112/h10-14,19-22,25-28,45-46,52-56,63,65-81,87-89,116,138-140H,9,15-18,23-24,29-44,47-51,111-113H2,1-8H3,(H2,114,141)(H,115,117)(H,118,161)(H,119,164)(H,120,151)(H,121,159)(H,122,160)(H,123,165)(H,124,156)(H,125,157)(H,126,166)(H,127,152)(H,128,153)(H,129,169)(H,130,168)(H,131,150)(H,132,154)(H,133,158)(H,134,163)(H,135,162)(H,136,167)(H,137,155)(H,142,143)(H,144,145)(H,146,147)(H,148,149)(H,170,171)/t55-,56+,63-,65-,66-,67-,68-,69-,70-,71-,72-,73-,74-,75-,76-,77-,78-,79-,80-,81-,87-,88-,89-/m0/s1
• InChIKey: ZHRYDGYRZIWZPS-RAALVGGVSA-N

NAMES AND DATABASE IDS

Names

• IUPAC name: (3S)-3-[(2S)-2-[(2S)-2-{[(1R,4S,7S,10S,13S,16S,19S,22S,25R,28S,31R,36R,39S,42S,45S)-31-amino-7,22-bis(4-aminobutyl)-39-benzyl-4-(2-carboxyethyl)-10,19-bis(carboxymethyl)-13-[(1R)-1-hydroxyethyl]-28-(hydroxymethyl)-42-[(4-hydroxyphenyl)methyl]-45-(2-methylpropyl)-16-[2-(methylsulfanyl)ethyl]-3,6,9,12,15,18,21,24,27,30,38,41,44,47-tetradecaoxo-33,34,49,50-tetrathia-2,5,8,11,14,17,20,23,26,29,37,40,43,46-tetradecaazabicyclo[23.22.4]henpentacontan-36-yl]formamido}-3-(1H-imidazol-4-yl)propanamido]-4-carbamoylbutanamido]-3-{[(1S)-1-{[(1S,2S)-1-{[(1S)-1-carboxy-2-(1H-indol-3-yl)ethyl]carbamoyl}-2-methylbutyl]carbamoyl}-2-methylpropyl]carbamoyl}propanoic acid
• IUPAC Traditional name: (3S)-3-[(2S)-2-[(2S)-2-{[(1R,4S,7S,10S,13S,16S,19S,22S,25R,28S,31R,36R,39S,42S,45S)-31-amino-7,22-bis(4-aminobutyl)-39-benzyl-4-(2-carboxyethyl)-10,19-bis(carboxymethyl)-13-[(1R)-1-hydroxyethyl]-28-(hydroxymethyl)-42-[(4-hydroxyphenyl)methyl]-45-(2-methylpropyl)-16-[2-(methylsulfanyl)ethyl]-3,6,9,12,15,18,21,24,27,30,38,41,44,47-tetradecaoxo-33,34,49,50-tetrathia-2,5,8,11,14,17,20,23,26,29,37,40,43,46-tetradecaazabicyclo[23.22.4]henpentacontan-36-yl]formamido}-3-(1H-imidazol-4-yl)propanamido]-4-carbamoylbutanamido]-3-{[(1S)-1-{[(1S,2S)-1-{[(1S)-1-carboxy-2-(1H-indol-3-yl)ethyl]carbamoyl}-2-methylbutyl]carbamoyl}-2-methylpropyl]carbamoyl}propanoic acid
• Synonyms: SRTX-b; Sarafotoxin S6b Atractaspis engaddensis sequence

Database IDs

• CAS Number: 116303-65-2
• MDL Number: MFCD00153553
• PubChem SID: 162228126
• PubChem CID: 71308726

CALCULATED PROPERTIES

• Acid pKa: 2.8557975
• H Acceptors: 38
• H Donor: 34
• LogD (pH = 5.5): -18.350166
• LogD (pH = 7.4): -21.92252
• Log P: -15.972019
• Molar Refractivity: 635.1144 cm^3
• Polarizability: 250.5304 Å^3
• Polar Surface Area: 994.81 Å^2
• Rotatable Bonds: 51
• Lipinski's Rule of Five: false

PROPERTIES

Safety Information

• German water hazard class: 3
• Personal Protective Equipment: Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter
• Storage Temperature: -20°C

Product Information

• Purity: ≥90% (HPLC)

DETAILS

Sigma Aldrich - S4146

Amino Acid Sequence
Cys-Ser-Cys-Lys-Asp-Met-Thr-Asp-Lys-Glu-Cys-Leu-Tyr-Phe-Cys-His-Gln-Asp-Val-Ile-Trp [Disulfide Bridges: 1-15, 3-11]
Biochem/physiol Actions
ETA agonist; increases intracellular Ca2+