Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1466
Number of amino acids:118
Molecular Weight:12285.7 Da
Theoretical pI:4.85


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1613.56%
Cysteine CYS (C)1210.17%
Glutamic Acid GLU (E)54.24%
Aspartic Acid ASP (D)43.39%
Glycine GLY (G)97.63%
Phynylalanine PHE (F)32.54%
Isoleucine ILE (I)75.93%
Histidine HIS (H)00%
Lysine LYS (K)32.54%
Methionine MET (M)00%
Leucine LEU (L)43.39%
Asparagine ASN (N)1512.71%
Glutamine GLN (Q)54.24%
Proline PRO (P)54.24%
Serine SER (S)65.08%
Arginine ARG (R)43.39%
Threonine THR (T)108.47%
Tryptophan TRP (W)10.85%
Valine VAL (V)75.93%
Tyrosine TYR (Y)21.69%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC510
HydrogenH812
NitrogenN154
OxygenO175
SulphurS12

FormulaC510H812N154O175S12
Total Number of Atoms:1663


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    9230
Absorption 0.1% (=1 g/l)    0.751,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.690,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.14

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.34, 29.66, 21.19]

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:67.1186
Grand average of hydropathicity (GRAVY):-0.12