Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4093
Number of amino acids:212
Molecular Weight:21208.94 Da
Theoretical pI:7.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2612.26%
Cysteine CYS (C)3215.09%
Glutamic Acid GLU (E)73.3%
Aspartic Acid ASP (D)41.89%
Glycine GLY (G)4219.81%
Phynylalanine PHE (F)41.89%
Isoleucine ILE (I)31.42%
Histidine HIS (H)20.94%
Lysine LYS (K)104.72%
Methionine MET (M)52.36%
Leucine LEU (L)83.77%
Asparagine ASN (N)115.19%
Glutamine GLN (Q)115.19%
Proline PRO (P)62.83%
Serine SER (S)136.13%
Arginine ARG (R)41.89%
Threonine THR (T)83.77%
Tryptophan TRP (W)31.42%
Valine VAL (V)41.89%
Tyrosine TYR (Y)94.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC866
HydrogenH1335
NitrogenN263
OxygenO287
SulphurS37

FormulaC866H1335N263O287S37
Total Number of Atoms:2788


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31910
Absorption 0.1% (=1 g/l)    1.505,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.410,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.80

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.62, 33.96, 21.70]

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:37.9717
Grand average of hydropathicity (GRAVY):-0.13