Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4616
Number of amino acids:571
Molecular Weight:66989.84 Da
Theoretical pI:6.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)213.68%
Cysteine CYS (C)20.35%
Glutamic Acid GLU (E)8014.01%
Aspartic Acid ASP (D)234.03%
Glycine GLY (G)284.9%
Phynylalanine PHE (F)234.03%
Isoleucine ILE (I)264.55%
Histidine HIS (H)122.1%
Lysine LYS (K)447.71%
Methionine MET (M)20.35%
Leucine LEU (L)549.46%
Asparagine ASN (N)366.3%
Glutamine GLN (Q)335.78%
Proline PRO (P)264.55%
Serine SER (S)427.36%
Arginine ARG (R)549.46%
Threonine THR (T)162.8%
Tryptophan TRP (W)30.53%
Valine VAL (V)305.25%
Tyrosine TYR (Y)162.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2930
HydrogenH4669
NitrogenN873
OxygenO921
SulphurS4

FormulaC2930H4669N873O921S4
Total Number of Atoms:9397


Total number of positively charged residues (ARG + LYS):98
Total number of negatively charged residues (ASP + GLU):103
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40465
Absorption 0.1% (=1 g/l)    0.604,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40340
Absorption 0.1% (=1 g/l)    0.602,   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 : 63.41

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.62, 23.12, 27.50]

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:73.5552
Grand average of hydropathicity (GRAVY):-1.08