Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4923
Number of amino acids:586
Molecular Weight:64149.19 Da
Theoretical pI:8.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)417%
Cysteine CYS (C)81.37%
Glutamic Acid GLU (E)264.44%
Aspartic Acid ASP (D)386.48%
Glycine GLY (G)366.14%
Phynylalanine PHE (F)213.58%
Isoleucine ILE (I)406.83%
Histidine HIS (H)91.54%
Lysine LYS (K)478.02%
Methionine MET (M)122.05%
Leucine LEU (L)427.17%
Asparagine ASN (N)223.75%
Glutamine GLN (Q)193.24%
Proline PRO (P)254.27%
Serine SER (S)6110.41%
Arginine ARG (R)223.75%
Threonine THR (T)478.02%
Tryptophan TRP (W)81.37%
Valine VAL (V)488.19%
Tyrosine TYR (Y)142.39%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2843
HydrogenH4548
NitrogenN766
OxygenO878
SulphurS20

FormulaC2843H4548N766O878S20
Total Number of Atoms:9055


Total number of positively charged residues (ARG + LYS):69
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    65360
Absorption 0.1% (=1 g/l)    1.019,   assuming all pairs of CYS residues form cystines

Ext. coefficient    64860
Absorption 0.1% (=1 g/l)    1.011,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.52, 24.57, 20.65]

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:85.3243
Grand average of hydropathicity (GRAVY):-0.21