Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6006
Number of amino acids:121
Molecular Weight:13889.27 Da
Theoretical pI:9.08


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.09%
Cysteine CYS (C)75.79%
Glutamic Acid GLU (E)119.09%
Aspartic Acid ASP (D)43.31%
Glycine GLY (G)54.13%
Phynylalanine PHE (F)32.48%
Isoleucine ILE (I)64.96%
Histidine HIS (H)10.83%
Lysine LYS (K)75.79%
Methionine MET (M)32.48%
Leucine LEU (L)1411.57%
Asparagine ASN (N)10.83%
Glutamine GLN (Q)54.13%
Proline PRO (P)21.65%
Serine SER (S)86.61%
Arginine ARG (R)1411.57%
Threonine THR (T)54.13%
Tryptophan TRP (W)10.83%
Valine VAL (V)97.44%
Tyrosine TYR (Y)43.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC604
HydrogenH999
NitrogenN179
OxygenO175
SulphurS10

FormulaC604H999N179O175S10
Total Number of Atoms:1967


Total number of positively charged residues (ARG + LYS):21
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11835
Absorption 0.1% (=1 g/l)    0.852,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.825,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.58, 13.22, 32.23]

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:95.1238
Grand average of hydropathicity (GRAVY):-0.15