Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2696
Number of amino acids:41
Molecular Weight:4957.89 Da
Theoretical pI:12.01


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.44%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)24.88%
Aspartic Acid ASP (D)00%
Glycine GLY (G)614.63%
Phynylalanine PHE (F)12.44%
Isoleucine ILE (I)37.32%
Histidine HIS (H)00%
Lysine LYS (K)24.88%
Methionine MET (M)24.88%
Leucine LEU (L)49.76%
Asparagine ASN (N)00%
Glutamine GLN (Q)512.2%
Proline PRO (P)00%
Serine SER (S)12.44%
Arginine ARG (R)819.51%
Threonine THR (T)00%
Tryptophan TRP (W)24.88%
Valine VAL (V)37.32%
Tyrosine TYR (Y)12.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC220
HydrogenH364
NitrogenN74
OxygenO53
SulphurS2

FormulaC220H364N74O53S2
Total Number of Atoms:713


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    2.519
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 74.52

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.15, 17.07, 21.95]

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:90.2439
Grand average of hydropathicity (GRAVY):-0.61