Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4481
Number of amino acids:764
Molecular Weight:85211.79 Da
Theoretical pI:6.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)303.93%
Cysteine CYS (C)303.93%
Glutamic Acid GLU (E)425.5%
Aspartic Acid ASP (D)425.5%
Glycine GLY (G)638.25%
Phynylalanine PHE (F)384.97%
Isoleucine ILE (I)496.41%
Histidine HIS (H)151.96%
Lysine LYS (K)425.5%
Methionine MET (M)121.57%
Leucine LEU (L)617.98%
Asparagine ASN (N)445.76%
Glutamine GLN (Q)273.53%
Proline PRO (P)263.4%
Serine SER (S)597.72%
Arginine ARG (R)395.1%
Threonine THR (T)587.59%
Tryptophan TRP (W)70.92%
Valine VAL (V)536.94%
Tyrosine TYR (Y)273.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3757
HydrogenH5885
NitrogenN1031
OxygenO1148
SulphurS42

FormulaC3757H5885N1031O1148S42
Total Number of Atoms:11863


Total number of positively charged residues (ARG + LYS):81
Total number of negatively charged residues (ASP + GLU):84
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    80605
Absorption 0.1% (=1 g/l)    0.946,   assuming all pairs of CYS residues form cystines

Ext. coefficient    78730
Absorption 0.1% (=1 g/l)    0.924,   assuming all CYS residues are reduced
Aromaticity:0.094

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.50

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.76, 25.13, 18.98]

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:80.1963
Grand average of hydropathicity (GRAVY):-0.25