Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5186
Number of amino acids:162
Molecular Weight:17194.18 Da
Theoretical pI:6.25


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1911.73%
Cysteine CYS (C)53.09%
Glutamic Acid GLU (E)95.56%
Aspartic Acid ASP (D)148.64%
Glycine GLY (G)2112.96%
Phynylalanine PHE (F)31.85%
Isoleucine ILE (I)53.09%
Histidine HIS (H)116.79%
Lysine LYS (K)42.47%
Methionine MET (M)31.85%
Leucine LEU (L)74.32%
Asparagine ASN (N)10.62%
Glutamine GLN (Q)00%
Proline PRO (P)63.7%
Serine SER (S)106.17%
Arginine ARG (R)159.26%
Threonine THR (T)74.32%
Tryptophan TRP (W)31.85%
Valine VAL (V)1811.11%
Tyrosine TYR (Y)10.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC733
HydrogenH1157
NitrogenN237
OxygenO228
SulphurS8

FormulaC733H1157N237O228S8
Total Number of Atoms:2363


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18240
Absorption 0.1% (=1 g/l)    1.061,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17990
Absorption 0.1% (=1 g/l)    1.046,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 64.85

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.84, 23.46, 23.46]

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:72.8395
Grand average of hydropathicity (GRAVY):-0.32