Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6093
Number of amino acids:256
Molecular Weight:27148.48 Da
Theoretical pI:4.86


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3413.28%
Cysteine CYS (C)103.91%
Glutamic Acid GLU (E)20.78%
Aspartic Acid ASP (D)114.3%
Glycine GLY (G)3312.89%
Phynylalanine PHE (F)103.91%
Isoleucine ILE (I)62.34%
Histidine HIS (H)10.39%
Lysine LYS (K)20.78%
Methionine MET (M)62.34%
Leucine LEU (L)176.64%
Asparagine ASN (N)114.3%
Glutamine GLN (Q)197.42%
Proline PRO (P)114.3%
Serine SER (S)176.64%
Arginine ARG (R)83.13%
Threonine THR (T)176.64%
Tryptophan TRP (W)124.69%
Valine VAL (V)187.03%
Tyrosine TYR (Y)114.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1210
HydrogenH1794
NitrogenN326
OxygenO358
SulphurS16

FormulaC1210H1794N326O358S16
Total Number of Atoms:3704


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83015
Absorption 0.1% (=1 g/l)    3.058,   assuming all pairs of CYS residues form cystines

Ext. coefficient    82390
Absorption 0.1% (=1 g/l)    3.035,   assuming all CYS residues are reduced
Aromaticity:0.129

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.91, 28.12, 23.05]

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:68.7109
Grand average of hydropathicity (GRAVY):0.05