Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3026
Number of amino acids:23
Molecular Weight:2623.15 Da
Theoretical pI:10.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)14.35%
Cysteine CYS (C)28.7%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)14.35%
Phynylalanine PHE (F)313.04%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)417.39%
Methionine MET (M)14.35%
Leucine LEU (L)00%
Asparagine ASN (N)14.35%
Glutamine GLN (Q)00%
Proline PRO (P)14.35%
Serine SER (S)313.04%
Arginine ARG (R)28.7%
Threonine THR (T)28.7%
Tryptophan TRP (W)00%
Valine VAL (V)28.7%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC115
HydrogenH188
NitrogenN34
OxygenO30
SulphurS3

FormulaC115H188N34O30S3
Total Number of Atoms:370


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    125
Absorption 0.1% (=1 g/l)    0.048,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.130

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 18.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.74, 26.09, 8.70]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:29.5652
Grand average of hydropathicity (GRAVY):-0.36