Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5404
Number of amino acids:164
Molecular Weight:18211.76 Da
Theoretical pI:7.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)95.49%
Cysteine CYS (C)21.22%
Glutamic Acid GLU (E)116.71%
Aspartic Acid ASP (D)84.88%
Glycine GLY (G)127.32%
Phynylalanine PHE (F)42.44%
Isoleucine ILE (I)148.54%
Histidine HIS (H)42.44%
Lysine LYS (K)148.54%
Methionine MET (M)31.83%
Leucine LEU (L)159.15%
Asparagine ASN (N)137.93%
Glutamine GLN (Q)31.83%
Proline PRO (P)84.88%
Serine SER (S)159.15%
Arginine ARG (R)63.66%
Threonine THR (T)63.66%
Tryptophan TRP (W)10.61%
Valine VAL (V)95.49%
Tyrosine TYR (Y)74.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC808
HydrogenH1289
NitrogenN221
OxygenO247
SulphurS5

FormulaC808H1289N221O247S5
Total Number of Atoms:2570


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16055
Absorption 0.1% (=1 g/l)    0.882,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    0.875,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.49, 29.27, 23.17]

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:90.3658
Grand average of hydropathicity (GRAVY):-0.40