Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4338
Number of amino acids:326
Molecular Weight:35716.74 Da
Theoretical pI:6.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)309.2%
Cysteine CYS (C)82.45%
Glutamic Acid GLU (E)237.06%
Aspartic Acid ASP (D)175.21%
Glycine GLY (G)237.06%
Phynylalanine PHE (F)154.6%
Isoleucine ILE (I)216.44%
Histidine HIS (H)113.37%
Lysine LYS (K)175.21%
Methionine MET (M)51.53%
Leucine LEU (L)267.98%
Asparagine ASN (N)103.07%
Glutamine GLN (Q)82.45%
Proline PRO (P)164.91%
Serine SER (S)298.9%
Arginine ARG (R)185.52%
Threonine THR (T)144.29%
Tryptophan TRP (W)51.53%
Valine VAL (V)267.98%
Tyrosine TYR (Y)41.23%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1585
HydrogenH2500
NitrogenN442
OxygenO472
SulphurS13

FormulaC1585H2500N442O472S13
Total Number of Atoms:5012


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33960
Absorption 0.1% (=1 g/l)    0.951,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33460
Absorption 0.1% (=1 g/l)    0.937,   assuming all CYS residues are reduced
Aromaticity:0.074

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.75, 23.93, 25.77]

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:88.5583
Grand average of hydropathicity (GRAVY):-0.11