Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4665
Number of amino acids:387
Molecular Weight:42608.31 Da
Theoretical pI:5.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)4010.34%
Cysteine CYS (C)10.26%
Glutamic Acid GLU (E)246.2%
Aspartic Acid ASP (D)205.17%
Glycine GLY (G)225.68%
Phynylalanine PHE (F)194.91%
Isoleucine ILE (I)184.65%
Histidine HIS (H)61.55%
Lysine LYS (K)256.46%
Methionine MET (M)123.1%
Leucine LEU (L)3910.08%
Asparagine ASN (N)205.17%
Glutamine GLN (Q)143.62%
Proline PRO (P)153.88%
Serine SER (S)287.24%
Arginine ARG (R)102.58%
Threonine THR (T)379.56%
Tryptophan TRP (W)20.52%
Valine VAL (V)194.91%
Tyrosine TYR (Y)164.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1904
HydrogenH2980
NitrogenN490
OxygenO591
SulphurS13

FormulaC1904H2980N490O591S13
Total Number of Atoms:5978


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.818,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.818,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.12

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.20, 21.96, 29.72]

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:82.0154
Grand average of hydropathicity (GRAVY):-0.20