Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4041
Number of amino acids:774
Molecular Weight:83810.3 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)7910.21%
Cysteine CYS (C)60.78%
Glutamic Acid GLU (E)567.24%
Aspartic Acid ASP (D)415.3%
Glycine GLY (G)506.46%
Phynylalanine PHE (F)232.97%
Isoleucine ILE (I)151.94%
Histidine HIS (H)101.29%
Lysine LYS (K)395.04%
Methionine MET (M)162.07%
Leucine LEU (L)8410.85%
Asparagine ASN (N)232.97%
Glutamine GLN (Q)192.45%
Proline PRO (P)759.69%
Serine SER (S)688.79%
Arginine ARG (R)638.14%
Threonine THR (T)445.68%
Tryptophan TRP (W)30.39%
Valine VAL (V)506.46%
Tyrosine TYR (Y)101.29%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3667
HydrogenH5941
NitrogenN1067
OxygenO1133
SulphurS22

FormulaC3667H5941N1067O1133S22
Total Number of Atoms:11830


Total number of positively charged residues (ARG + LYS):102
Total number of negatively charged residues (ASP + GLU):97
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    31775
Absorption 0.1% (=1 g/l)    0.379,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    0.375,   assuming all CYS residues are reduced
Aromaticity:0.047

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.64

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.90, 27.91, 30.36]

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:78.8242
Grand average of hydropathicity (GRAVY):-0.45