Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5958
Number of amino acids:111
Molecular Weight:12609.87 Da
Theoretical pI:7.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)65.41%
Cysteine CYS (C)21.8%
Glutamic Acid GLU (E)98.11%
Aspartic Acid ASP (D)54.5%
Glycine GLY (G)65.41%
Phynylalanine PHE (F)98.11%
Isoleucine ILE (I)119.91%
Histidine HIS (H)10.9%
Lysine LYS (K)98.11%
Methionine MET (M)21.8%
Leucine LEU (L)1210.81%
Asparagine ASN (N)43.6%
Glutamine GLN (Q)21.8%
Proline PRO (P)76.31%
Serine SER (S)65.41%
Arginine ARG (R)65.41%
Threonine THR (T)43.6%
Tryptophan TRP (W)10.9%
Valine VAL (V)87.21%
Tyrosine TYR (Y)10.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC581
HydrogenH925
NitrogenN147
OxygenO157
SulphurS4

FormulaC581H925N147O157S4
Total Number of Atoms:1814


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7115
Absorption 0.1% (=1 g/l)    0.564,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.554,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.84, 20.72, 26.13]

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:107.117
Grand average of hydropathicity (GRAVY):0.13