Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5999
Number of amino acids:136
Molecular Weight:14760.99 Da
Theoretical pI:7.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1813.24%
Cysteine CYS (C)21.47%
Glutamic Acid GLU (E)96.62%
Aspartic Acid ASP (D)96.62%
Glycine GLY (G)107.35%
Phynylalanine PHE (F)53.68%
Isoleucine ILE (I)42.94%
Histidine HIS (H)32.21%
Lysine LYS (K)128.82%
Methionine MET (M)32.21%
Leucine LEU (L)1410.29%
Asparagine ASN (N)10.74%
Glutamine GLN (Q)32.21%
Proline PRO (P)32.21%
Serine SER (S)118.09%
Arginine ARG (R)75.15%
Threonine THR (T)42.94%
Tryptophan TRP (W)10.74%
Valine VAL (V)139.56%
Tyrosine TYR (Y)42.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC656
HydrogenH1056
NitrogenN180
OxygenO196
SulphurS5

FormulaC656H1056N180O196S5
Total Number of Atoms:2093


Total number of positively charged residues (ARG + LYS):19
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11585
Absorption 0.1% (=1 g/l)    0.785,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.776,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.15, 18.38, 32.35]

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:92.5735
Grand average of hydropathicity (GRAVY):-0.06