Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4864
Number of amino acids:636
Molecular Weight:71782.71 Da
Theoretical pI:8.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)314.87%
Cysteine CYS (C)172.67%
Glutamic Acid GLU (E)284.4%
Aspartic Acid ASP (D)304.72%
Glycine GLY (G)446.92%
Phynylalanine PHE (F)325.03%
Isoleucine ILE (I)467.23%
Histidine HIS (H)121.89%
Lysine LYS (K)294.56%
Methionine MET (M)111.73%
Leucine LEU (L)629.75%
Asparagine ASN (N)365.66%
Glutamine GLN (Q)213.3%
Proline PRO (P)253.93%
Serine SER (S)457.08%
Arginine ARG (R)436.76%
Threonine THR (T)426.6%
Tryptophan TRP (W)91.42%
Valine VAL (V)507.86%
Tyrosine TYR (Y)233.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3220
HydrogenH5068
NitrogenN884
OxygenO920
SulphurS28

FormulaC3220H5068N884O920S28
Total Number of Atoms:10120


Total number of positively charged residues (ARG + LYS):72
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84770
Absorption 0.1% (=1 g/l)    1.181,   assuming all pairs of CYS residues form cystines

Ext. coefficient    83770
Absorption 0.1% (=1 g/l)    1.167,   assuming all CYS residues are reduced
Aromaticity:0.101

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.91, 23.58, 20.75]

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:93.8994
Grand average of hydropathicity (GRAVY):-0.07