Peptide name : Human neutrophil peptide-2

Source/Organism : Neutrophils; natural killer cells, monocytes; airway, saliva; Human

Linear/Cyclic : Not found

Chirality : L

Peptide length: 29

C-terminal modification: Not found

N-terminal modification : Free

Non-natural peptide information: None

Assay type : Not specified

Assay time : Not found

Activity : Not found

Cell line : Not found

Cancer type : Fibrosarcoma

Other activity : Not found

Amino acid composition bar chart :

Molecular mass : 3376.9991 Dalton

Aliphatic index : 0.641

Instability index : 42.1345

Hydrophobicity (GRAVY) : 0.2483

Isoelectric point : 8.6745

Charge (pH 7) : 2.7005

Aromaticity : 0.172

Molar extinction coefficient (cysteine, cystine): (9970, 10345)

Hydrophobic/hydrophilic ratio : 1.9

hydrophobic moment : 0.2281

Missing amino acid : H,M,K,S,D,N,V

Most occurring amino acid : C

Most occurring amino acid frequency : 6

Least occurring amino acid : P

Least occurring amino acid frequency : 1

Secondary structure fraction (Helix, Turn, Sheet): (0.1, 0.1, 0.3)

SMILES Notation: CC[C@H](C)[C@H](NC(=O)[C@H](CS)NC(=O)[C@H](C)NC(=O)[C@@H]1CCCN1C(=O)[C@@H](NC(=O)[C@H](CCCNC(=N)N)NC(=O)[C@H](CS)NC(=O)[C@H](Cc1ccc(O)cc1)NC(=O)[C@@H](N)CS)[C@@H](C)CC)C(=O)N[C@@H](C)C(=O)NCC(=O)N[C@@H](CCC(=O)O)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](Cc1ccc(O)cc1)C(=O)NCC(=O)N[C@H](C(=O)N[C@@H](CS)C(=O)N[C@H](C(=O)N[C@@H](Cc1ccc(O)cc1)C(=O)N[C@@H](CCC(N)=O)C(=O)NCC(=O)N[C@@H](CCCNC(=N)N)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](Cc1c[nH]c2ccccc12)C(=O)N[C@@H](C)C(=O)N[C@@H](Cc1ccccc1)C(=O)N[C@@H](CS)C(=O)N[C@@H](CS)C(=O)O)[C@@H](C)CC)[C@@H](C)O

1 : Selsted ME, et al. Primary structures of three human neutrophil defensins. J Clin Invest. 1985; 76:1436-9. doi: 10.1172/JCI112121

Paper title : Primary structures of three human neutrophil defensins.

Doi : https://doi.org/10.1172/JCI112121

Abstract : The primary structures of three human neutrophil antimicrobial peptides (HNP) were determined. The peptides, HNP-1, HNP-2, and HNP-3, which we have termed defensins, were rich in cystine, arginine, and aromatic residues, but were devoid of free sulfhydryl groups and carbohydrate moieties. They were 29-30 residues in length and identical in sequence in all but their amino terminal residues. The defensins were homologous in sequence to peptides of similar size and biological activity previously purified from rabbit polymorphonuclear leukocytes, but unrelated to other neutrophil proteins of known sequence. 11 amino acid residues of the human defensins, including all six cysteinyl residues, were invariantly conserved in the six rabbit members of this multigene peptide family. That similarly structured antimicrobial peptides are present in both rabbit and human leukocytes supports their purported role as cidal agents in phagocyte-mediated host defense.