General Information


DRAVP ID  DRAVPe02093

Peptide Name   4H30

Sequence  GAICHPVFCPRRYKQIGTCGLPGTKCCKKP

Sequence Length  30

UniProt ID  O15263 

Taxon ID  9606 

Source  human beta-defensin 2 (HBD2)

Other Link  DRAVPa2313

Validation   Experimentally Validated



Origin Information


Gene Name/ID  DEFB4A(100289462)

GenBank  AF040153.1

Amino Acid position  20-64

Domain Accession ID  pfam00711 

Nucleotide sequence ID  CM000670.2 

Molecular Type  mRNA

Chromosomal Position  Chromosome 8:7,894,677-7,896,716



Activity Information


Target Organism  SARS-CoV-2

Assay  plaque reduction assay/

Activity 

  • [Ref:35768416]SARS-CoV-2: 4H30 significantly inhibited infection (IC50 = 0.59 µg/mL or 44 nM).

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

Cytotoxicity 

  • [Ref:35768416]Vero E6, Calu-3: TC50 > 400 µg/mL.

Binding Target  Lipid Bilayer

Mechanism  4H30 can inhibit three distinct steps of the SARS-CoV-2 life cycle. Specifically, 4H30 blocks viral entry by clustering SARS-CoV-2 virions; prevents membrane fusion by inhibiting endosomal acidification; and inhibits the release of virions by cross-linking SARS-CoV-2 with cellular glycosaminoglycans.



Structure Information


PDB ID  1FD3 

Predicted Structure Download  No predicted structure available

Linear/Cyclic  Linear

N-terminal Modification  Free

C-terminal Modification  Free

Other Modification  None

Stereochemistry  L



Physicochemical Information


Formula  C87H157N23O24S2

Absent amino acids  ARNDQEHIMFPTWYOU

Common amino acids  GLV

Mass  1973.46

Pl  8.9

Basic residues  7

Acidic residues  0

Hydrophobic residues  11

Net charge  7

Boman Index  1.12

Hydrophobicity  -1.36

Aliphatic Index  152.86

Half Life 

  •     Mammalian:30 hours
  •     Yeast:>20 hours
  •     E.coli:>10 hours

Extinction Coefficient cystines  125

Absorbance 280nm  0.063

Polar residues  8



Literature Information


Literature 1

Title   A trifunctional peptide broadly inhibits SARS-CoV-2 Delta and Omicron variants in hamsters

Pubmed ID   35768416

Reference   Cell Discov. 2022 Jun 30;8(1):62

Author   Zhao H, To KK, Lam H, Zhang C, Peng Z, Meng X, Wang X, Zhang AJ, Yan B, Cai J, Yeung ML, Chan JF, Yuen KY

DOI   10.1038/s41421-022-00428-9