Catestatin is a cationic hydrophobic peptide containing 21 amino acid (AA) residues. Catestatin is an endogenous peptide that regulates heart function and blood pressure. Catestatin is a noncompetitive nicotinic antagonist that can inhibit the release of catecholamines through nicotinic acetylcholine receptors (nAChRs).

Physicochemical Properties

Molecular Formula	C107H173N37O26S
Molecular Weight	2425.82
Exact Mass	2325.22
CAS #	142211-96-9
Related CAS #	Catestatin TFA
PubChem CID	16143960
Appearance	White to off-white solid powder
LogP	2.066
Hydrogen Bond Donor Count	40
Hydrogen Bond Acceptor Count	33
Rotatable Bond Count	85
Heavy Atom Count	171
Complexity	5230
Defined Atom Stereocenter Count	17
SMILES	C[C@@H](C(=O)N[C@@H](CCCNC(=N)N)C(=O)NCC(=O)N[C@@H](CC1=CC=C(C=C1)O)C(=O)NCC(=O)N[C@@H](CC2=CC=CC=C2)C(=O)N[C@@H](CCCNC(=N)N)C(=O)NCC(=O)N3CCC[C@H]3C(=O)NCC(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCC(=O)N)C(=O)N[C@@H](CC(C)C)C(=O)O)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CC4=CC=CC=C4)NC(=O)[C@H](CO)NC(=O)[C@H](CC(C)C)NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CCSC)NC(=O)[C@H](CO)NC(=O)[C@H](CCCNC(=N)N)N
InChi Key	HCEYIDADOJWYIM-DIWOTYQXSA-N
InChi Code	InChI=1S/C107H173N37O26S/c1-57(2)45-72(95(162)137-70(35-36-81(109)148)93(160)141-77(102(169)170)47-59(5)6)130-84(151)53-127-101(168)80-30-20-43-144(80)85(152)54-128-89(156)67(27-17-40-122-105(114)115)134-97(164)75(48-61-21-11-9-12-22-61)132-83(150)52-126-90(157)74(50-63-31-33-64(147)34-32-63)131-82(149)51-125-88(155)66(26-16-39-121-104(112)113)133-86(153)60(7)129-91(158)68(28-18-41-123-106(116)117)136-98(165)76(49-62-23-13-10-14-24-62)140-100(167)79(56-146)143-96(163)73(46-58(3)4)139-92(159)69(29-19-42-124-107(118)119)135-94(161)71(37-44-171-8)138-99(166)78(55-145)142-87(154)65(108)25-15-38-120-103(110)111/h9-14,21-24,31-34,57-60,65-80,145-147H,15-20,25-30,35-56,108H2,1-8H3,(H2,109,148)(H,125,155)(H,126,157)(H,127,168)(H,128,156)(H,129,158)(H,130,151)(H,131,149)(H,132,150)(H,133,153)(H,134,164)(H,135,161)(H,136,165)(H,137,162)(H,138,166)(H,139,159)(H,140,167)(H,141,160)(H,142,154)(H,143,163)(H,169,170)(H4,110,111,120)(H4,112,113,121)(H4,114,115,122)(H4,116,117,123)(H4,118,119,124)/t60-,65-,66-,67-,68-,69-,70-,71-,72-,73-,74-,75-,76-,77-,78-,79-,80-/m0/s1
Chemical Name	(2S)-2-[[(2S)-5-amino-2-[[(2S)-2-[[2-[[(2S)-1-[2-[[(2S)-2-[[(2S)-2-[[2-[[(2S)-2-[[2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-amino-5-carbamimidamidopentanoyl]amino]-3-hydroxypropanoyl]amino]-4-methylsulfanylbutanoyl]amino]-5-carbamimidamidopentanoyl]amino]-4-methylpentanoyl]amino]-3-hydroxypropanoyl]amino]-3-phenylpropanoyl]amino]-5-carbamimidamidopentanoyl]amino]propanoyl]amino]-5-carbamimidamidopentanoyl]amino]acetyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]acetyl]amino]-3-phenylpropanoyl]amino]-5-carbamimidamidopentanoyl]amino]acetyl]pyrrolidine-2-carbonyl]amino]acetyl]amino]-4-methylpentanoyl]amino]-5-oxopentanoyl]amino]-4-methylpentanoic acid
HS Tariff Code	2934.99.9001
Storage	Powder-20°C 3 years 4°C 2 years In solvent -80°C 6 months -20°C 1 month
Shipping Condition	Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

Biological Activity

References

[1]. Nitish R Mahapatra. Catestatin Is a Novel Endogenous Peptide That Regulates Cardiac Function and Blood Pressure. Cardiovasc Res. 2008 Dec 1;80(3):330-8. [2]. A Molecular Dynamics Study of Catestatin Docked on Nicotinic Acetylcholine Receptors to Identify Amino Acids Potentially Involved in the Binding of Chromogranin A Fragments. Phys Chem Chem Phys. 2015 Jul 14;17(26):17454-60.

Solubility Data

Solubility (In Vitro)

May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples

Solubility (In Vivo)

Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples. Injection Formulations (e.g. IP/IV/IM/SC) Injection Formulation 1: DMSO : Tween 80： Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution → 50 μL Tween 80 → 850 μL Saline) *Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution. Injection Formulation 2: DMSO : PEG300 ：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO → 900 μL Corn oil) Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals). Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO → 900 μL (20% SBE-β-CD in saline)] *Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution. Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin → 500 μL Saline) Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO → 100 μLPEG300 → 200 μL castor oil → 650 μL Saline) Injection Formulation 7: Ethanol : Cremophor : Saline = 10： 10 : 80 (i.e. 100 μL Ethanol → 100 μL Cremophor → 800 μL Saline) Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH → 900 μL Corn oil) Injection Formulation 10: EtOH : PEG300：Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH → 400 μLPEG300 → 50 μL Tween 80 → 450 μL Saline) Oral Formulations Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium) Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals). Oral Formulation 3: Dissolved in PEG400 Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose Oral Formulation 6: Mixing with food powders Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.  (Please use freshly prepared in vivo formulations for optimal results.)

Preparing Stock Solutions		1 mg	5 mg	10 mg
	1 mM	0.4122 mL	2.0612 mL	4.1223 mL
	5 mM	0.0824 mL	0.4122 mL	0.8245 mL
	10 mM	0.0412 mL	0.2061 mL	0.4122 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.