Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5392
Number of amino acids:253
Molecular Weight:27632.71 Da
Theoretical pI:5.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.7%
Cysteine CYS (C)72.77%
Glutamic Acid GLU (E)103.95%
Aspartic Acid ASP (D)155.93%
Glycine GLY (G)3011.86%
Phynylalanine PHE (F)176.72%
Isoleucine ILE (I)166.32%
Histidine HIS (H)20.79%
Lysine LYS (K)51.98%
Methionine MET (M)51.98%
Leucine LEU (L)124.74%
Asparagine ASN (N)207.91%
Glutamine GLN (Q)103.95%
Proline PRO (P)114.35%
Serine SER (S)145.53%
Arginine ARG (R)155.93%
Threonine THR (T)187.11%
Tryptophan TRP (W)31.19%
Valine VAL (V)103.95%
Tyrosine TYR (Y)114.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1216
HydrogenH1834
NitrogenN340
OxygenO377
SulphurS12

FormulaC1216H1834N340O377S12
Total Number of Atoms:3779


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33265
Absorption 0.1% (=1 g/l)    1.204,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.190,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.27, 29.64, 19.37]

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:63.3201
Grand average of hydropathicity (GRAVY):-0.33