Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5557
Number of amino acids:274
Molecular Weight:31494.81 Da
Theoretical pI:6.28


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)103.65%
Cysteine CYS (C)20.73%
Glutamic Acid GLU (E)217.66%
Aspartic Acid ASP (D)165.84%
Glycine GLY (G)196.93%
Phynylalanine PHE (F)124.38%
Isoleucine ILE (I)248.76%
Histidine HIS (H)82.92%
Lysine LYS (K)196.93%
Methionine MET (M)51.82%
Leucine LEU (L)248.76%
Asparagine ASN (N)176.2%
Glutamine GLN (Q)114.01%
Proline PRO (P)134.74%
Serine SER (S)176.2%
Arginine ARG (R)155.47%
Threonine THR (T)134.74%
Tryptophan TRP (W)51.82%
Valine VAL (V)145.11%
Tyrosine TYR (Y)93.28%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1413
HydrogenH2205
NitrogenN387
OxygenO416
SulphurS7

FormulaC1413H2205N387O416S7
Total Number of Atoms:4428


Total number of positively charged residues (ARG + LYS):34
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41035
Absorption 0.1% (=1 g/l)    1.303,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.299,   assuming all CYS residues are reduced
Aromaticity:0.095

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.12, 24.09, 21.90]

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:86.7883
Grand average of hydropathicity (GRAVY):-0.50