Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4874
Number of amino acids:158
Molecular Weight:17222.58 Da
Theoretical pI:8.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)138.23%
Cysteine CYS (C)42.53%
Glutamic Acid GLU (E)21.27%
Aspartic Acid ASP (D)106.33%
Glycine GLY (G)1610.13%
Phynylalanine PHE (F)31.9%
Isoleucine ILE (I)85.06%
Histidine HIS (H)42.53%
Lysine LYS (K)74.43%
Methionine MET (M)31.9%
Leucine LEU (L)1811.39%
Asparagine ASN (N)148.86%
Glutamine GLN (Q)74.43%
Proline PRO (P)31.9%
Serine SER (S)95.7%
Arginine ARG (R)74.43%
Threonine THR (T)95.7%
Tryptophan TRP (W)42.53%
Valine VAL (V)127.59%
Tyrosine TYR (Y)53.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC757
HydrogenH1197
NitrogenN219
OxygenO227
SulphurS7

FormulaC757H1197N219O227S7
Total Number of Atoms:2407


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29700
Absorption 0.1% (=1 g/l)    1.724,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29450
Absorption 0.1% (=1 g/l)    1.710,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.34

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.65, 26.58, 22.78]

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:94.4304
Grand average of hydropathicity (GRAVY):-0.12