Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4354
Number of amino acids:386
Molecular Weight:42583.45 Da
Theoretical pI:5.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)379.59%
Cysteine CYS (C)20.52%
Glutamic Acid GLU (E)235.96%
Aspartic Acid ASP (D)225.7%
Glycine GLY (G)235.96%
Phynylalanine PHE (F)194.92%
Isoleucine ILE (I)225.7%
Histidine HIS (H)71.81%
Lysine LYS (K)235.96%
Methionine MET (M)123.11%
Leucine LEU (L)4110.62%
Asparagine ASN (N)164.15%
Glutamine GLN (Q)133.37%
Proline PRO (P)164.15%
Serine SER (S)297.51%
Arginine ARG (R)92.33%
Threonine THR (T)348.81%
Tryptophan TRP (W)20.52%
Valine VAL (V)184.66%
Tyrosine TYR (Y)184.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1915
HydrogenH2981
NitrogenN481
OxygenO587
SulphurS14

FormulaC1915H2981N481O587S14
Total Number of Atoms:5978


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):45
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37945
Absorption 0.1% (=1 g/l)    0.891,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37820
Absorption 0.1% (=1 g/l)    0.888,   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 : 39.84

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.09, 21.76, 29.27]

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:86.7618
Grand average of hydropathicity (GRAVY):-0.10