Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4872
Number of amino acids:130
Molecular Weight:14517.86 Da
Theoretical pI:9.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1410.77%
Cysteine CYS (C)64.62%
Glutamic Acid GLU (E)32.31%
Aspartic Acid ASP (D)75.38%
Glycine GLY (G)96.92%
Phynylalanine PHE (F)53.85%
Isoleucine ILE (I)86.15%
Histidine HIS (H)00%
Lysine LYS (K)53.85%
Methionine MET (M)32.31%
Leucine LEU (L)53.85%
Asparagine ASN (N)86.15%
Glutamine GLN (Q)43.08%
Proline PRO (P)53.85%
Serine SER (S)21.54%
Arginine ARG (R)1310%
Threonine THR (T)86.15%
Tryptophan TRP (W)10.77%
Valine VAL (V)1713.08%
Tyrosine TYR (Y)75.38%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC641
HydrogenH1023
NitrogenN187
OxygenO180
SulphurS9

FormulaC641H1023N187O180S9
Total Number of Atoms:2040


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    16305
Absorption 0.1% (=1 g/l)    1.123,   assuming all pairs of CYS residues form cystines

Ext. coefficient    15930
Absorption 0.1% (=1 g/l)    1.097,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.43

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.08, 18.46, 19.23]

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:87.6922
Grand average of hydropathicity (GRAVY):0.02