General Information

    • DRAMP ID

    • DRAMP03083

    • Peptide Name

    • Sapecin-B (defensins; Insects, animals)

    • Source

    • Sarcophaga peregrina (Flesh fly)

    • Family

    • Belongs to the invertebrate defensin family (Type 1 subfamily)

    • Gene

    • Not found

    • Sequence

    • LTCEIDRSLCLLHCRLKGYLRAYCSQQKVCRCVQ

    • Sequence Length

    • 34

    • Protein Existence

    • Protein level

Activity Information

    • Biological Activity

    • Antimicrobial, Antibacterial, Anti-Gram+, Anti-Gram-

    • Target Organism

      • Gram-negative bacteria: Escherichia coli, Proteus mirabilis, Klebsiella pneumoniae;
      • Gram-positive bacteria: Staphylococcus spps., Streptococcus spps, Bacillus megaterium, Bacillus circulans, Corynebacterium glutamicum.

    • 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

    • Bridge

    • Structure Description

    • Not found

    • Helical Wheel Diagram

    • DRAMP03083 helical wheel diagram

    • PDB ID

    • None

    • Predicted Structure

    • There is no predicted structure for DRAMP03083.

Physicochemical Information

    • Formula

    • C169H285N53O47S6

    • Absent Amino Acids

    • FMNPW

    • Common Amino Acids

    • CL

    • Mass

    • 4003.81

    • PI

    • 8.92

    • Basic Residues

    • 7

    • Acidic Residues

    • 2

    • Hydrophobic Residues

    • 10

    • Net Charge

    • +5

    • Boman Index

    • -64.29

    • Hydrophobicity

    • 0.021

    • Aliphatic Index

    • 100.29

    • Half Life

      • Mammalian:5.5 hour
      • Yeast:3 min
      • E.coli:2 min

    • Extinction Coefficient Cystines

    • 3355

    • Absorbance 280nm

    • 101.67

    • Polar Residues

    • 12

DRAMP03083

DRAMP03083 chydropathy plot

Comments Information

    • Function

    • Sapecins, which are potent bactericidal proteins, are produced in response to body injury. Thus, sapecin is probably a defense protein synthesized by Sarcophaga to prevent bacterial infection through the damaged body wall. This gene was also found to be activated in the embryonic and early pupal stages, suggesting that sapecin also plays a role in the ontogenetic processes of Sarcophaga.

Literature Information

  • ·Literature 1

    • Title

    • Molecular cloning of cDNA for sapecin B, an antibacterial protein of Sarcophaga, and its detection in larval brain.

    • Reference

    • FEBS Lett. 1995 Jul 24;368(3):485-487.

    • Author

    • Lee SR, Kurata S, Natori S.
  • ·Literature 2

    • Title

    • Purification, sequence and antibacterial activity of two novel sapecin homologues from Sarcophaga embryonic cells: similarity of sapecin B to charybdotoxin.

    • Reference

    • Biochem J. 1993 Apr 1;291 (Pt 1):275-279.

    • Author

    • Yamada K, Natori S.