Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4579
Number of amino acids:788
Molecular Weight:87391.38 Da
Theoretical pI:7.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)313.93%
Cysteine CYS (C)303.81%
Glutamic Acid GLU (E)435.46%
Aspartic Acid ASP (D)435.46%
Glycine GLY (G)597.49%
Phynylalanine PHE (F)324.06%
Isoleucine ILE (I)546.85%
Histidine HIS (H)111.4%
Lysine LYS (K)536.73%
Methionine MET (M)131.65%
Leucine LEU (L)617.74%
Asparagine ASN (N)556.98%
Glutamine GLN (Q)192.41%
Proline PRO (P)293.68%
Serine SER (S)789.9%
Arginine ARG (R)364.57%
Threonine THR (T)475.96%
Tryptophan TRP (W)70.89%
Valine VAL (V)587.36%
Tyrosine TYR (Y)293.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3841
HydrogenH6072
NitrogenN1052
OxygenO1189
SulphurS43

FormulaC3841H6072N1052O1189S43
Total Number of Atoms:12197


Total number of positively charged residues (ARG + LYS):89
Total number of negatively charged residues (ASP + GLU):86
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    83585
Absorption 0.1% (=1 g/l)    0.956,   assuming all pairs of CYS residues form cystines

Ext. coefficient    81710
Absorption 0.1% (=1 g/l)    0.935,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 46.70

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.58, 28.05, 18.78]

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:82.1954
Grand average of hydropathicity (GRAVY):-0.27