The molecule is a 27-membered polypeptide comprising the sequence Ac-Asp-Pro-Met-Ser-Ser-Thr-Tyr-Ile-Glu-Glu-Leu-Gly-Lys-Arg-Glu-Val-Thr-Ile-Pro-Pro-Lys-Tyr-Arg-Glu-Leu-Leu-Ala-NH2. An acetylated synthetic peptide from human calpastatin that strongly inhibits both calpains I and II but not papain (a cysteine protease) or trypsin (a serine protease). It has a role as an EC 3.4.22.52 (calpain-1) inhibitor and an EC 3.4.22.53 (calpain-2) inhibitor.
IUPAC name: (4S)-4-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-1-[(2S,3S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-1-[(2S)-2-acetamido-3-carboxypropanoyl]pyrrolidine-2-carbonyl]amino]-4-methylsulfanylbutanoyl]amino]-3-hydroxypropanoyl]amino]-3-hydroxypropanoyl]amino]-3-hydroxybutanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-methylpentanoyl]amino]-4-carboxybutanoyl]amino]-4-carboxybutanoyl]amino]-4-methylpentanoyl]amino]acetyl]amino]-6-aminohexanoyl]amino]-5-carbamimidamidopentanoyl]amino]-4-carboxybutanoyl]amino]-3-methylbutanoyl]amino]-3-hydroxybutanoyl]amino]-3-methylpentanoyl]pyrrolidine-2-carbonyl]pyrrolidine-2-carbonyl]amino]-6-aminohexanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-5-carbamimidamidopentanoyl]amino]-5-[[(2S)-1-[[(2S)-1-[[(2S)-1-amino-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-5-oxopentanoic acid
SMILES: CC[C@H](C)[C@H](N=C(O)[C@@H](N=C(O)[C@@H](N=C(O)[C@H](CCC(=O)O)N=C(O)[C@H](CCCNC(=N)N)N=C(O)[C@H](CCCCN)N=C(O)CN=C(O)[C@H](CC(C)C)N=C(O)[C@H](CCC(=O)O)N=C(O)[C@H](CCC(=O)O)N=C(O)[C@@H](N=C(O)[C@H](Cc1ccc(O)cc1)N=C(O)[C@@H](N=C(O)[C@H](CO)N=C(O)[C@H](CO)N=C(O)[C@H](CCSC)N=C(O)[C@@H]1CCCN1C(=O)[C@H](CC(=O)O)N=C(C)O)[C@@H](C)O)[C@@H](C)CC)C(C)C)[C@@H](C)O)C(=O)N1CCC[C@H]1C(=O)N1CCC[C@H]1C(O)=N[C@@H](CCCCN)C(O)=N[C@@H](Cc1ccc(O)cc1)C(O)=N[C@@H](CCCNC(=N)N)C(O)=N[C@@H](CCC(=O)O)C(O)=N[C@@H](CC(C)C)C(O)=N[C@@H](CC(C)C)C(O)=N[C@@H](C)C(=N)O
SELFIES: [C][C][C@H1][Branch1][C][C][C@H1][Branch2][S][N][N][=C][Branch1][C][O][C@@H1][Branch2][#C][=C][N][=C][Branch1][C][O][C@@H1][Branch2][=C][S][N][=C][Branch1][C][O][C@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][N][=C][Branch1][C][O][C@H1][Branch1][#Branch2][C][C][C][N][C][=Branch1][C][=N][N][N][=C][Branch1][C][O][C@H1][Branch1][=Branch1][C][C][C][C][N][N][=C][Branch1][C][O][C][N][=C][Branch1][C][O][C@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][N][=C][Branch1][C][O][C@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][N][=C][Branch1][C][O][C@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][N][=C][Branch1][C][O][C@@H1][Branch2][Branch2][C][N][=C][Branch1][C][O][C@H1][Branch1][=N][C][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1][N][=C][Branch1][C][O][C@@H1][Branch2][Branch1][S][N][=C][Branch1][C][O][C@H1][Branch1][Ring1][C][O][N][=C][Branch1][C][O][C@H1][Branch1][Ring1][C][O][N][=C][Branch1][C][O][C@H1][Branch1][Branch1][C][C][S][C][N][=C][Branch1][C][O][C@@H1][C][C][C][N][Ring1][Branch1][C][=Branch1][C][=O][C@H1][Branch1][#Branch1][C][C][=Branch1][C][=O][O][N][=C][Branch1][C][C][O][C@@H1][Branch1][C][C][O][C@@H1][Branch1][C][C][C][C][C][Branch1][C][C][C][C@@H1][Branch1][C][C][O][C][=Branch1][C][=O][N][C][C][C][C@H1][Ring1][Branch1][C][=Branch1][C][=O][N][C][C][C][C@H1][Ring1][Branch1][C][Branch1][C][O][=N][C@@H1][Branch1][=Branch1][C][C][C][C][N][C][Branch1][C][O][=N][C@@H1][Branch1][=N][C][C][=C][C][=C][Branch1][C][O][C][=C][Ring1][#Branch1][C][Branch1][C][O][=N][C@@H1][Branch1][#Branch2][C][C][C][N][C][=Branch1][C][=N][N][C][Branch1][C][O][=N][C@@H1][Branch1][Branch2][C][C][C][=Branch1][C][=O][O][C][Branch1][C][O][=N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][Branch1][C][O][=N][C@@H1][Branch1][#Branch1][C][C][Branch1][C][C][C][C][Branch1][C][O][=N][C@@H1][Branch1][C][C][C][=Branch1][C][=N][O]
InChI: InChI=1S/C142H230N36O44S/c1-18-74(11)111(172-129(211)97(65-81-38-42-83(185)43-39-81)168-136(218)113(77(14)181)174-131(213)100(69-180)170-130(212)99(68-179)169-124(206)92(52-60-223-17)162-132(214)101-33-26-57-176(101)138(220)98(66-109(195)196)154-79(16)183)135(217)163-90(46-50-107(191)192)121(203)159-88(44-48-105(187)188)122(204)164-93(61-70(3)4)116(198)152-67-104(186)155-84(29-20-22-53-143)117(199)156-86(31-24-55-150-141(146)147)118(200)160-91(47-51-108(193)194)125(207)171-110(73(9)10)134(216)175-114(78(15)182)137(219)173-112(75(12)19-2)140(222)178-59-28-35-103(178)139(221)177-58-27-34-102(177)133(215)161-85(30-21-23-54-144)120(202)167-96(64-80-36-40-82(184)41-37-80)128(210)157-87(32-25-56-151-142(148)149)119(201)158-89(45-49-106(189)190)123(205)165-95(63-72(7)8)127(209)166-94(62-71(5)6)126(208)153-76(13)115(145)197/h36-43,70-78,84-103,110-114,179-182,184-185H,18-35,44-69,143-144H2,1-17H3,(H2,145,197)(H,152,198)(H,153,208)(H,154,183)(H,155,186)(H,156,199)(H,157,210)(H,158,201)(H,159,203)(H,160,200)(H,161,215)(H,162,214)(H,163,217)(H,164,204)(H,165,205)(H,166,209)(H,167,202)(H,168,218)(H,169,206)(H,170,212)(H,171,207)(H,172,211)(H,173,219)(H,174,213)(H,175,216)(H,187,188)(H,189,190)(H,191,192)(H,193,194)(H,195,196)(H4,146,147,150)(H4,148,149,151)/t74-,75-,76-,77+,78+,84-,85-,86-,87-,88-,89-,90-,91-,92-,93-,94-,95-,96-,97-,98-,99-,100-,101-,102-,103-,110-,111-,112-,113-,114-/m0/s1
Topological polar surface area: 1310.0
XLogP: -9.4