Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5083
Number of amino acids:278
Molecular Weight:29974.4 Da
Theoretical pI:9.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3111.15%
Cysteine CYS (C)82.88%
Glutamic Acid GLU (E)20.72%
Aspartic Acid ASP (D)134.68%
Glycine GLY (G)269.35%
Phynylalanine PHE (F)113.96%
Isoleucine ILE (I)93.24%
Histidine HIS (H)41.44%
Lysine LYS (K)113.96%
Methionine MET (M)134.68%
Leucine LEU (L)176.12%
Asparagine ASN (N)155.4%
Glutamine GLN (Q)103.6%
Proline PRO (P)227.91%
Serine SER (S)186.47%
Arginine ARG (R)113.96%
Threonine THR (T)207.19%
Tryptophan TRP (W)93.24%
Valine VAL (V)196.83%
Tyrosine TYR (Y)93.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1336
HydrogenH2044
NitrogenN364
OxygenO381
SulphurS21

FormulaC1336H2044N364O381S21
Total Number of Atoms:4146


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63410
Absorption 0.1% (=1 g/l)    2.115,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    2.099,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.62, 29.14, 22.66]

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:67.4461
Grand average of hydropathicity (GRAVY):-0.08