Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4521
Number of amino acids:222
Molecular Weight:21805.9 Da
Theoretical pI:10.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3515.77%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)10.45%
Aspartic Acid ASP (D)20.9%
Glycine GLY (G)10.45%
Phynylalanine PHE (F)10.45%
Isoleucine ILE (I)73.15%
Histidine HIS (H)62.7%
Lysine LYS (K)62.7%
Methionine MET (M)10.45%
Leucine LEU (L)62.7%
Asparagine ASN (N)31.35%
Glutamine GLN (Q)73.15%
Proline PRO (P)7835.14%
Serine SER (S)2712.16%
Arginine ARG (R)20.9%
Threonine THR (T)2410.81%
Tryptophan TRP (W)10.45%
Valine VAL (V)135.86%
Tyrosine TYR (Y)10.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC995
HydrogenH1555
NitrogenN257
OxygenO291
SulphurS1

FormulaC995H1555N257O291S1
Total Number of Atoms:3099


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.321
Aromaticity:0.014

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 124.91

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.06, 49.10, 19.37]

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:55.5856
Grand average of hydropathicity (GRAVY):-0.39