Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4674
Number of amino acids:293
Molecular Weight:33949.44 Da
Theoretical pI:8.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)144.78%
Cysteine CYS (C)51.71%
Glutamic Acid GLU (E)113.75%
Aspartic Acid ASP (D)196.48%
Glycine GLY (G)227.51%
Phynylalanine PHE (F)237.85%
Isoleucine ILE (I)124.1%
Histidine HIS (H)72.39%
Lysine LYS (K)196.48%
Methionine MET (M)51.71%
Leucine LEU (L)186.14%
Asparagine ASN (N)165.46%
Glutamine GLN (Q)113.75%
Proline PRO (P)144.78%
Serine SER (S)196.48%
Arginine ARG (R)175.8%
Threonine THR (T)165.46%
Tryptophan TRP (W)93.07%
Valine VAL (V)217.17%
Tyrosine TYR (Y)155.12%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1551
HydrogenH2301
NitrogenN413
OxygenO431
SulphurS10

FormulaC1551H2301N413O431S10
Total Number of Atoms:4706


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72100
Absorption 0.1% (=1 g/l)    2.124,   assuming all pairs of CYS residues form cystines

Ext. coefficient    71850
Absorption 0.1% (=1 g/l)    2.116,   assuming all CYS residues are reduced
Aromaticity:0.160

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.45, 24.23, 16.38]

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:65.4949
Grand average of hydropathicity (GRAVY):-0.46