General Information

    • DRAMP ID

    • DRAMP00955

    • Peptide Name

    • Viscotoxin-B (VtB; Plant defensin)

    • Source

    • Viscum album (European mistletoe)

    • Family

    • Belongs to the thionin family

    • Gene

    • THI2.2

    • Sequence

    • KSCCPNTTGRNIYNTCRLGGGSRERCASLSGCKIISASTCPSDYPK

    • Sequence Length

    • 46

    • Protein Existence

    • Protein level

Activity Information

    • Biological Activity

    • Antimicrobial, Antifungal, Cytotoxic

    • Target Organism

      • Fungi: Fusarium solani, Sclerotinia sclerotiorum, Phytophtora infestans.

    • Hemolytic Activity

      • No hemolysis information or data found in the reference(s) presented in this entry

    • Cytotoxicity

      • Not included yet

    • Binding Target

    • Not found

Structure Information

    • Linear/Cyclic

    • Not included yet

    • N-terminal Modification

    • Not included yet

    • C-terminal Modification

    • Not included yet

    • Nonterminal Modifications and Unusual Amino Acids

    • Not included yet

    • Stereochemistry

    • Not included yet

    • Structure

    • Combine helix and strand structure

    • Structure Description

    • Not found

    • Helical Wheel Diagram

    • DRAMP00955 helical wheel diagram

    • PDB ID

    • 1JMP resolved by NMR. 2V9B resolved by X-ray.

    • Predicted Structure

    • There is no predicted structure for DRAMP00955.

Physicochemical Information

    • Formula

    • C197H328N64O67S6

    • Absent Amino Acids

    • FHMQVW

    • Common Amino Acids

    • S

    • Mass

    • 4857.52

    • PI

    • 9.13

    • Basic Residues

    • 7

    • Acidic Residues

    • 2

    • Hydrophobic Residues

    • 7

    • Net Charge

    • +5

    • Boman Index

    • -105.54

    • Hydrophobicity

    • -0.55

    • Aliphatic Index

    • 46.74

    • Half Life

      • Mammalian:1.3 hour
      • Yeast:3 min
      • E.coli:2 min

    • Extinction Coefficient Cystines

    • 3355

    • Absorbance 280nm

    • 74.56

    • Polar Residues

    • 27

DRAMP00955

DRAMP00955 chydropathy plot

Comments Information

    • Function

    • Thionins are small plant proteins which are toxic to animal cells. They seem to exert their toxic effect at the level of the cell membrane. Their precise Function

    • PTM

    • Contains three disulfide bonds 3-40; 4-32; 16-26.

Literature Information

  • ·Literature 1

    • Title

    • Isolation and characterization of cDNAs encoding viscotoxins of mistletoe (Viscum album).

    • Reference

    • Eur J Biochem. 1991 Jun 15;198(3):549-553.

    • Author

    • Schrader G, Apel K.
  • ·Literature 2

    • Title

    • Comparative membrane interaction study of viscotoxins A3, A2 and B from mistletoe (Viscum album) and connections with their structures.

    • Reference

    • Biochem J. 2003 Aug 15;374(Pt 1):71-78.

    • Author

    • Coulon A, Mosbah A, Lopez A, Sautereau AM, Schaller G, Urech K, Roug© P, Darbon H.