Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4669
Number of amino acids:339
Molecular Weight:33750.24 Da
Theoretical pI:6.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)10430.68%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)185.31%
Aspartic Acid ASP (D)92.65%
Glycine GLY (G)133.83%
Phynylalanine PHE (F)92.65%
Isoleucine ILE (I)72.06%
Histidine HIS (H)20.59%
Lysine LYS (K)257.37%
Methionine MET (M)20.59%
Leucine LEU (L)164.72%
Asparagine ASN (N)82.36%
Glutamine GLN (Q)82.36%
Proline PRO (P)257.37%
Serine SER (S)92.65%
Arginine ARG (R)20.59%
Threonine THR (T)4212.39%
Tryptophan TRP (W)00%
Valine VAL (V)267.67%
Tyrosine TYR (Y)144.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1515
HydrogenH2408
NitrogenN390
OxygenO475
SulphurS2

FormulaC1515H2408N390O475S2
Total Number of Atoms:4790


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):27
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    20860
Absorption 0.1% (=1 g/l)    0.618
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.24, 16.22, 41.30]

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:79.3806
Grand average of hydropathicity (GRAVY):0.16