Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6148
Number of amino acids:256
Molecular Weight:29338.64 Da
Theoretical pI:9.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)41.56%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)93.52%
Aspartic Acid ASP (D)10.39%
Glycine GLY (G)10.39%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)72.73%
Histidine HIS (H)00%
Lysine LYS (K)4517.58%
Methionine MET (M)20.78%
Leucine LEU (L)83.13%
Asparagine ASN (N)20.78%
Glutamine GLN (Q)10.39%
Proline PRO (P)9235.94%
Serine SER (S)62.34%
Arginine ARG (R)10.39%
Threonine THR (T)10.39%
Tryptophan TRP (W)00%
Valine VAL (V)3915.23%
Tyrosine TYR (Y)3714.45%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1462
HydrogenH2213
NitrogenN307
OxygenO324
SulphurS2

FormulaC1462H2213N307O324S2
Total Number of Atoms:4308


Total number of positively charged residues (ARG + LYS):46
Total number of negatively charged residues (ASP + GLU):10
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    55130
Absorption 0.1% (=1 g/l)    1.879
Aromaticity:0.145

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 58.58

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.55, 39.45, 8.98]

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:68.5938
Grand average of hydropathicity (GRAVY):-0.74