Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5191
Number of amino acids:269
Molecular Weight:28776.79 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)259.29%
Cysteine CYS (C)93.35%
Glutamic Acid GLU (E)72.6%
Aspartic Acid ASP (D)114.09%
Glycine GLY (G)3412.64%
Phynylalanine PHE (F)103.72%
Isoleucine ILE (I)51.86%
Histidine HIS (H)62.23%
Lysine LYS (K)155.58%
Methionine MET (M)41.49%
Leucine LEU (L)165.95%
Asparagine ASN (N)134.83%
Glutamine GLN (Q)93.35%
Proline PRO (P)186.69%
Serine SER (S)124.46%
Arginine ARG (R)114.09%
Threonine THR (T)197.06%
Tryptophan TRP (W)93.35%
Valine VAL (V)2810.41%
Tyrosine TYR (Y)82.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1287
HydrogenH1972
NitrogenN360
OxygenO367
SulphurS13

FormulaC1287H1972N360O367S13
Total Number of Atoms:3999


Total number of positively charged residues (ARG + LYS):26
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    61920
Absorption 0.1% (=1 g/l)    2.152,   assuming all pairs of CYS residues form cystines

Ext. coefficient    61420
Absorption 0.1% (=1 g/l)    2.134,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.25, 28.62, 19.33]

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:69.9256
Grand average of hydropathicity (GRAVY):-0.17