Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6160
Number of amino acids:59
Molecular Weight:6576.7 Da
Theoretical pI:4.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.69%
Cysteine CYS (C)711.86%
Glutamic Acid GLU (E)35.08%
Aspartic Acid ASP (D)35.08%
Glycine GLY (G)46.78%
Phynylalanine PHE (F)35.08%
Isoleucine ILE (I)46.78%
Histidine HIS (H)00%
Lysine LYS (K)35.08%
Methionine MET (M)23.39%
Leucine LEU (L)46.78%
Asparagine ASN (N)46.78%
Glutamine GLN (Q)35.08%
Proline PRO (P)35.08%
Serine SER (S)23.39%
Arginine ARG (R)11.69%
Threonine THR (T)46.78%
Tryptophan TRP (W)11.69%
Valine VAL (V)610.17%
Tyrosine TYR (Y)11.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC286
HydrogenH451
NitrogenN73
OxygenO86
SulphurS9

FormulaC286H451N73O86S9
Total Number of Atoms:905


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    1.120,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.063,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.75

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.20, 22.03, 16.95]

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:84.0678
Grand average of hydropathicity (GRAVY):0.26