Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4905
Number of amino acids:153
Molecular Weight:16799.53 Da
Theoretical pI:7.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)138.5%
Cysteine CYS (C)106.54%
Glutamic Acid GLU (E)85.23%
Aspartic Acid ASP (D)63.92%
Glycine GLY (G)138.5%
Phynylalanine PHE (F)21.31%
Isoleucine ILE (I)21.31%
Histidine HIS (H)10.65%
Lysine LYS (K)74.58%
Methionine MET (M)74.58%
Leucine LEU (L)127.84%
Asparagine ASN (N)53.27%
Glutamine GLN (Q)53.27%
Proline PRO (P)95.88%
Serine SER (S)106.54%
Arginine ARG (R)85.23%
Threonine THR (T)63.92%
Tryptophan TRP (W)63.92%
Valine VAL (V)1811.76%
Tyrosine TYR (Y)53.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC737
HydrogenH1156
NitrogenN202
OxygenO213
SulphurS17

FormulaC737H1156N202O213S17
Total Number of Atoms:2325


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41075
Absorption 0.1% (=1 g/l)    2.445,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40450
Absorption 0.1% (=1 g/l)    2.408,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.41, 24.18, 26.14]

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:78.3006
Grand average of hydropathicity (GRAVY):0.02