Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4507
Number of amino acids:219
Molecular Weight:23032.76 Da
Theoretical pI:8.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2712.33%
Cysteine CYS (C)20.91%
Glutamic Acid GLU (E)52.28%
Aspartic Acid ASP (D)104.57%
Glycine GLY (G)188.22%
Phynylalanine PHE (F)156.85%
Isoleucine ILE (I)104.57%
Histidine HIS (H)52.28%
Lysine LYS (K)156.85%
Methionine MET (M)62.74%
Leucine LEU (L)219.59%
Asparagine ASN (N)115.02%
Glutamine GLN (Q)62.74%
Proline PRO (P)209.13%
Serine SER (S)135.94%
Arginine ARG (R)31.37%
Threonine THR (T)125.48%
Tryptophan TRP (W)00%
Valine VAL (V)177.76%
Tyrosine TYR (Y)31.37%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1050
HydrogenH1650
NitrogenN270
OxygenO295
SulphurS8

FormulaC1050H1650N270O295S8
Total Number of Atoms:3273


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):15
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    4595
Absorption 0.1% (=1 g/l)    0.199,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.194,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.45

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.14, 28.31, 26.94]

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:90.0457
Grand average of hydropathicity (GRAVY):0.19