Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4147
Number of amino acids:292
Molecular Weight:33882.06 Da
Theoretical pI:7.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)175.82%
Cysteine CYS (C)51.71%
Glutamic Acid GLU (E)93.08%
Aspartic Acid ASP (D)227.53%
Glycine GLY (G)217.19%
Phynylalanine PHE (F)196.51%
Isoleucine ILE (I)155.14%
Histidine HIS (H)62.05%
Lysine LYS (K)165.48%
Methionine MET (M)41.37%
Leucine LEU (L)206.85%
Asparagine ASN (N)155.14%
Glutamine GLN (Q)134.45%
Proline PRO (P)144.79%
Serine SER (S)196.51%
Arginine ARG (R)155.14%
Threonine THR (T)196.51%
Tryptophan TRP (W)113.77%
Valine VAL (V)134.45%
Tyrosine TYR (Y)196.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1549
HydrogenH2272
NitrogenN404
OxygenO440
SulphurS9

FormulaC1549H2272N404O440S9
Total Number of Atoms:4674


Total number of positively charged residues (ARG + LYS):31
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    89060
Absorption 0.1% (=1 g/l)    2.629,   assuming all pairs of CYS residues form cystines

Ext. coefficient    88810
Absorption 0.1% (=1 g/l)    2.621,   assuming all CYS residues are reduced
Aromaticity:0.168

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.22, 23.63, 17.12]

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:65.4795
Grand average of hydropathicity (GRAVY):-0.51