Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4633
Number of amino acids:290
Molecular Weight:33259.01 Da
Theoretical pI:6


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)93.1%
Cysteine CYS (C)41.38%
Glutamic Acid GLU (E)165.52%
Aspartic Acid ASP (D)155.17%
Glycine GLY (G)3110.69%
Phynylalanine PHE (F)175.86%
Isoleucine ILE (I)134.48%
Histidine HIS (H)72.41%
Lysine LYS (K)124.14%
Methionine MET (M)62.07%
Leucine LEU (L)175.86%
Asparagine ASN (N)237.93%
Glutamine GLN (Q)93.1%
Proline PRO (P)103.45%
Serine SER (S)227.59%
Arginine ARG (R)155.17%
Threonine THR (T)155.17%
Tryptophan TRP (W)93.1%
Valine VAL (V)206.9%
Tyrosine TYR (Y)206.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1500
HydrogenH2202
NitrogenN402
OxygenO442
SulphurS10

FormulaC1500H2202N402O442S10
Total Number of Atoms:4556


Total number of positively charged residues (ARG + LYS):27
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    79550
Absorption 0.1% (=1 g/l)    2.392,   assuming all pairs of CYS residues form cystines

Ext. coefficient    79300
Absorption 0.1% (=1 g/l)    2.384,   assuming all CYS residues are reduced
Aromaticity:0.159

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.10, 29.66, 16.55]

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:63.4483
Grand average of hydropathicity (GRAVY):-0.54