Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3690
Number of amino acids:23
Molecular Weight:2592.04 Da
Theoretical pI:8.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)14.35%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)14.35%
Aspartic Acid ASP (D)00%
Glycine GLY (G)14.35%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)14.35%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)521.74%
Asparagine ASN (N)28.7%
Glutamine GLN (Q)28.7%
Proline PRO (P)313.04%
Serine SER (S)14.35%
Arginine ARG (R)28.7%
Threonine THR (T)14.35%
Tryptophan TRP (W)00%
Valine VAL (V)28.7%
Tyrosine TYR (Y)14.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC117
HydrogenH195
NitrogenN33
OxygenO33
SulphurS0

FormulaC117H195N33O33S0
Total Number of Atoms:378


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.575
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 85.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[39.13, 30.43, 30.43]

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:131.304
Grand average of hydropathicity (GRAVY):-0.04