STh

• CAT Number: I044247
• CAS Number: 118447-40-8
• Molecular Formula: C79H112N22O30S6
• Molecular Weight: 2042.25
• Purity: ≥95%
• IUPAC Name: (2S)-2-[[(1R,4S,7S,13S,16R,21R,24R,27S,30S,33R,38R,44S)-21-[[(2S)-2-[[(2S)-4-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2,4-diamino-4-oxobutanoyl]amino]-3-hydroxypropanoyl]amino]-3-hydroxypropanoyl]amino]-4-oxobutanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-13-(2-amino-2-oxoethyl)-27-(2-carboxyethyl)-44-[(1R)-1-hydroxyethyl]-4-methyl-30-(2-methylpropyl)-3,6,12,15,22,25,28,31,40,43,46,51-dodecaoxo-18,19,35,36,48,49-hexathia-2,5,11,14,23,26,29,32,39,42,45,52-dodecazatetracyclo[22.22.4.216,33.07,11]dopentacontane-38-carbonyl]amino]-3-(4-hydroxyphenyl)propanoic acid
• InChI: InChI=1S/C79H112N22O30S6/c1-33(2)18-42-65(116)96-52-30-133-132-27-49(70(121)92-46(79(130)131)20-37-9-13-39(106)14-10-37)86-59(110)24-84-77(128)61(35(4)104)100-75(126)54-32-137-134-28-50(71(122)87-41(64(115)88-42)15-16-60(111)112)98-74(125)53(31-136-135-29-51(99-73(52)124)72(123)91-45(23-58(83)109)78(129)101-17-5-6-55(101)76(127)85-34(3)62(113)95-54)97-66(117)43(19-36-7-11-38(105)12-8-36)89-67(118)44(22-57(82)108)90-68(119)48(26-103)94-69(120)47(25-102)93-63(114)40(80)21-56(81)107/h7-14,33-35,40-55,61,102-106H,5-6,15-32,80H2,1-4H3,(H2,81,107)(H2,82,108)(H2,83,109)(H,84,128)(H,85,127)(H,86,110)(H,87,122)(H,88,115)(H,89,118)(H,90,119)(H,91,123)(H,92,121)(H,93,114)(H,94,120)(H,95,113)(H,96,116)(H,97,117)(H,98,125)(H,99,124)(H,100,126)(H,111,112)(H,130,131)/t34-,35+,40-,41-,42-,43-,44-,45-,46-,47-,48-,49-,50-,51-,52-,53-,54-,55-,61-/m0/s1
• InChIKey: ALQPDZQRJKSEQZ-MZBYGZHOSA-N
• SMILES: C[C@H]1C(=O)N[C@H]2CSSC[C@H]3C(=O)N[C@H](C(=O)N[C@H](C(=O)N[C@@H](CSSC[C@H](NC(=O)CNC(=O)[C@@H](NC2=O)[C@@H](C)O)C(=O)N[C@@H](CC4=CC=C(C=C4)O)C(=O)O)C(=O)N[C@@H](CSSC[C@@H](C(=O)N3)NC(=O)[C@H](CC5=CC=C(C=C5)O)NC(=O)[C@H](CC(=O)N)NC(=O)[C@H](CO)NC(=O)[C@H](CO)NC(=O)[C@H](CC(=O)N)N)C(=O)N[C@H](C(=O)N6CCC[C@H]6C(=O)N1)CC(=O)N)CC(C)C)CCC(=O)O

STh (Cat No.:I044247) is a small, cysteine-rich peptide produced by certain strains of Escherichia coli. It mimics endogenous guanylin by binding to and activating guanylate cyclase C (GC-C) receptors on intestinal epithelial cells. This leads to elevated intracellular cGMP levels, resulting in increased chloride and water secretion into the intestinal lumen, causing secretory diarrhea. STh is commonly studied in gastrointestinal research to understand toxin-induced fluid imbalance and is also used as a tool in drug development targeting GC-C pathways for conditions like chronic constipation and irritable bowel syndrome.