Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5969
Number of amino acids:273
Molecular Weight:30982.89 Da
Theoretical pI:9.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)134.76%
Cysteine CYS (C)134.76%
Glutamic Acid GLU (E)134.76%
Aspartic Acid ASP (D)103.66%
Glycine GLY (G)186.59%
Phynylalanine PHE (F)134.76%
Isoleucine ILE (I)165.86%
Histidine HIS (H)41.47%
Lysine LYS (K)228.06%
Methionine MET (M)93.3%
Leucine LEU (L)279.89%
Asparagine ASN (N)217.69%
Glutamine GLN (Q)62.2%
Proline PRO (P)93.3%
Serine SER (S)259.16%
Arginine ARG (R)155.49%
Threonine THR (T)103.66%
Tryptophan TRP (W)20.73%
Valine VAL (V)134.76%
Tyrosine TYR (Y)145.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1372
HydrogenH2165
NitrogenN377
OxygenO396
SulphurS22

FormulaC1372H2165N377O396S22
Total Number of Atoms:4332


Total number of positively charged residues (ARG + LYS):37
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    32610
Absorption 0.1% (=1 g/l)    1.053,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31860
Absorption 0.1% (=1 g/l)    1.028,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.14, 26.74, 22.71]

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:80
Grand average of hydropathicity (GRAVY):-0.26