Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2700
Number of amino acids:37
Molecular Weight:4322.29 Da
Theoretical pI:11.5


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.7%
Cysteine CYS (C)38.11%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)00%
Glycine GLY (G)25.41%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)25.41%
Histidine HIS (H)12.7%
Lysine LYS (K)616.22%
Methionine MET (M)12.7%
Leucine LEU (L)25.41%
Asparagine ASN (N)12.7%
Glutamine GLN (Q)38.11%
Proline PRO (P)12.7%
Serine SER (S)38.11%
Arginine ARG (R)513.51%
Threonine THR (T)00%
Tryptophan TRP (W)12.7%
Valine VAL (V)513.51%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC186
HydrogenH327
NitrogenN65
OxygenO45
SulphurS4

FormulaC186H327N65O45S4
Total Number of Atoms:627


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):0
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5625
Absorption 0.1% (=1 g/l)    1.301,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.272,   assuming all CYS residues are reduced
Aromaticity:0.027

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.03, 18.92, 10.81]

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:84.054
Grand average of hydropathicity (GRAVY):-0.54