Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5417
Number of amino acids:293
Molecular Weight:30729.13 Da
Theoretical pI:4.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3210.92%
Cysteine CYS (C)62.05%
Glutamic Acid GLU (E)31.02%
Aspartic Acid ASP (D)217.17%
Glycine GLY (G)3110.58%
Phynylalanine PHE (F)124.1%
Isoleucine ILE (I)165.46%
Histidine HIS (H)31.02%
Lysine LYS (K)82.73%
Methionine MET (M)20.68%
Leucine LEU (L)299.9%
Asparagine ASN (N)165.46%
Glutamine GLN (Q)144.78%
Proline PRO (P)113.75%
Serine SER (S)3411.6%
Arginine ARG (R)31.02%
Threonine THR (T)196.48%
Tryptophan TRP (W)72.39%
Valine VAL (V)144.78%
Tyrosine TYR (Y)124.1%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1369
HydrogenH2077
NitrogenN353
OxygenO437
SulphurS8

FormulaC1369H2077N353O437S8
Total Number of Atoms:4244


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    56755
Absorption 0.1% (=1 g/l)    1.847,   assuming all pairs of CYS residues form cystines

Ext. coefficient    56380
Absorption 0.1% (=1 g/l)    1.835,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.72, 31.40, 22.53]

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:84.6758
Grand average of hydropathicity (GRAVY):0.05