Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4441
Number of amino acids:817
Molecular Weight:91120.28 Da
Theoretical pI:6.51


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)496%
Cysteine CYS (C)182.2%
Glutamic Acid GLU (E)394.77%
Aspartic Acid ASP (D)496%
Glycine GLY (G)617.47%
Phynylalanine PHE (F)364.41%
Isoleucine ILE (I)323.92%
Histidine HIS (H)161.96%
Lysine LYS (K)313.79%
Methionine MET (M)141.71%
Leucine LEU (L)8210.04%
Asparagine ASN (N)354.28%
Glutamine GLN (Q)232.82%
Proline PRO (P)374.53%
Serine SER (S)789.55%
Arginine ARG (R)536.49%
Threonine THR (T)516.24%
Tryptophan TRP (W)161.96%
Valine VAL (V)657.96%
Tyrosine TYR (Y)323.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4059
HydrogenH6295
NitrogenN1113
OxygenO1213
SulphurS32

FormulaC4059H6295N1113O1213S32
Total Number of Atoms:12712


Total number of positively charged residues (ARG + LYS):84
Total number of negatively charged residues (ASP + GLU):88
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    136805
Absorption 0.1% (=1 g/l)    1.501,   assuming all pairs of CYS residues form cystines

Ext. coefficient    135680
Absorption 0.1% (=1 g/l)    1.489,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.19, 25.83, 22.52]

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:83.4883
Grand average of hydropathicity (GRAVY):-0.21