Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6169
Number of amino acids:150
Molecular Weight:16225.51 Da
Theoretical pI:9.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)138.67%
Cysteine CYS (C)21.33%
Glutamic Acid GLU (E)74.67%
Aspartic Acid ASP (D)32%
Glycine GLY (G)138.67%
Phynylalanine PHE (F)53.33%
Isoleucine ILE (I)53.33%
Histidine HIS (H)53.33%
Lysine LYS (K)42.67%
Methionine MET (M)21.33%
Leucine LEU (L)149.33%
Asparagine ASN (N)42.67%
Glutamine GLN (Q)106.67%
Proline PRO (P)117.33%
Serine SER (S)149.33%
Arginine ARG (R)117.33%
Threonine THR (T)96%
Tryptophan TRP (W)21.33%
Valine VAL (V)149.33%
Tyrosine TYR (Y)21.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC716
HydrogenH1145
NitrogenN213
OxygenO210
SulphurS4

FormulaC716H1145N213O210S4
Total Number of Atoms:2288


Total number of positively charged residues (ARG + LYS):15
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    14105
Absorption 0.1% (=1 g/l)    0.869,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    0.862,   assuming all CYS residues are reduced
Aromaticity:0.060

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.62

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.00, 28.00, 24.00]

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:85.1333
Grand average of hydropathicity (GRAVY):-0.19