M7391

Melittin from honey bee venom

≥65% (HPLC)

• Empirical Formula (Hill Notation): C₁₃₁H₂₂₉N₃₉O₃₁
• CAS Number: 20449-79-0
• Molecular Weight: 2846.46
• MDL number: MFCD00076868
• UNSPSC Code: 12352202
• PubChem Substance ID: 329817905
• NACRES: NA.32

Properties

• form: lyophilized powder
• Quality Level: 200
• mol wt: ~_2.8 kDa
• concentration: ≥65% (HPLC)
• solubility: water: 5.00-5.20 mg/mL, clear, colorless to faintly yellow
• foreign activity: Phospholipase A₂ ≤2%
• storage temp.: −20°C
• SMILES string: CC[C@H](C)[C@H](NC(=O)CN)C(=O)NCC(=O)N[C@@H](C)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H]([C@@H](C)O)C(=O)NCC(=O)N[C@@H](CC(C)C)C(=O)N1CCC[C@H]1C(=O)N[C@@H](C)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@@H](Cc2c[nH]c3ccccc23)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCC(N)=O)C(N)=O
• InChI: 1S/C131H229N39O31/c1-23-71(16)102(163-97(176)60-135)122(194)146-62-98(177)148-74(19)109(181)164-100(69(12)13)124(196)160-88(55-65(4)5)116(188)155-84(41-30-33-51-134)115(187)165-101(70(14)15)125(197)161-90(57-67(8)9)118(190)168-106(77(22)173)128(200)169-105(76(21)172)123(195)147-63-99(178)150-92(58-68(10)11)129(201)170-54-36-44-94(170)121(193)149-75(20)108(180)158-89(56-66(6)7)117(189)166-104(73(18)25-3)127(199)162-93(64-171)120(192)159-91(59-78-61-145-80-38-27-26-37-79(78)80)119(191)167-103(72(17)24-2)126(198)157-83(40-29-32-50-133)111(183)154-85(42-34-52-143-130(139)140)112(184)152-82(39-28-31-49-132)110(182)153-86(43-35-53-144-131(141)142)113(185)156-87(46-48-96(137)175)114(186)151-81(107(138)179)45-47-95(136)174/h26-27,37-38,61,65-77,81-94,100-106,145,171-173H,23-25,28-36,39-60,62-64,132-135H2,1-22H3,(H2,136,174)(H2,137,175)(H2,138,179)(H,146,194)(H,147,195)(H,148,177)(H,149,193)(H,150,178)(H,151,186)(H,152,184)(H,153,182)(H,154,183)(H,155,188)(H,156,185)(H,157,198)(H,158,180)(H,159,192)(H,160,196)(H,161,197)(H,162,199)(H,163,176)(H,164,181)(H,165,187)(H,166,189)(H,167,191)(H,168,190)(H,169,200)(H4,139,140,143)(H4,141,142,144)/t71-,72-,73-,74-,75-,76+,77+,81-,82-,83-,84-,85-,86-,87-,88-,89-,90-,91-,92-,93-,94-,100-,101-,102-,103-,104-,105-,106-/m0/s1
• InChI key: VDXZNPDIRNWWCW-JFTDCZMZSA-N

Description

Amino Acid Sequence

Gly-Ile-Gly-Ala-Val-Leu-Lys-Val-Leu-Thr-Thr-Gly-Leu-Pro-Ala-Leu-Ile-Ser-Trp-Ile-Lys-Arg-Lys-Arg-Gln-Gln-NH2

General description

Melittin is hydrophobic in nature except for a region with Lys-Arg-Lys-Arg sequence near C-terminal end. This structural characteristic makes melittin a highly surface-active and a powerful, direct haemolytic agent. The encoded protein contains 26 amino acids. Monomeric form of melittin has a molecular weight of 2,840Da and tetrameric form has molecular weight of approximately 12,500Da.

Application

Melittin from honey bee venom has been used to study the role of melittin in allergic reactions.

Biochem/physiol Actions

Binds calmodulin in a Ca²⁺-dependent manner; inhibits Na⁺-K⁺-ATPase.

Melittin acts as an anti-coagulating protein by increasing the time of blood clotting in vitro. Melittin inhibits the activity of S100 calcium-binding protein B (S100B) and plays a vital role in Epilepsy treatment. Melittin retard cathepsin S-induced invasion, proliferation and angiogenesis via inhibition of the vascular endothelial growth factor A (VEGF-A) /VEGF receptor 2 (VEGFR-2)/ mitogen-activated protein kinase 1 (MEK1)/ extracellular signal-regulated kinase 1/2 (ERK1/2) pathway in human MHCC97-H cells (liver cancer cells). Melittin has therapeutic application in various inflammatory diseases such as skin inflammation, neuroinflammation, atherosclerosis, arthritis and liver inflammation. Accumulated melittin degrades phospholipid packing in the cell membrane and causes cell lysis and cell death.

Other Notes

The principle hemolytic component of honeybee venom.

Safety Information

• Pictograms: GHS06
• Signal Word: Danger
• Hazard Statements: H301 + H311
• Precautionary Statements: P264 - P270 - P280 - P301 + P310 - P302 + P352 + P312 - P361 + P364
• Hazard Classifications: Acute Tox. 3 Dermal - Acute Tox. 3 Oral
• Storage Class Code: 6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves