Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4369
Number of amino acids:488
Molecular Weight:53758.09 Da
Theoretical pI:6.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.76%
Cysteine CYS (C)51.02%
Glutamic Acid GLU (E)234.71%
Aspartic Acid ASP (D)204.1%
Glycine GLY (G)479.63%
Phynylalanine PHE (F)224.51%
Isoleucine ILE (I)224.51%
Histidine HIS (H)112.25%
Lysine LYS (K)122.46%
Methionine MET (M)40.82%
Leucine LEU (L)459.22%
Asparagine ASN (N)285.74%
Glutamine GLN (Q)5511.27%
Proline PRO (P)255.12%
Serine SER (S)377.58%
Arginine ARG (R)306.15%
Threonine THR (T)214.3%
Tryptophan TRP (W)51.02%
Valine VAL (V)336.76%
Tyrosine TYR (Y)102.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2358
HydrogenH3698
NitrogenN700
OxygenO726
SulphurS9

FormulaC2358H3698N700O726S9
Total Number of Atoms:7491


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):43
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    42650
Absorption 0.1% (=1 g/l)    0.793,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42400
Absorption 0.1% (=1 g/l)    0.789,   assuming all CYS residues are reduced
Aromaticity:0.076

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.60

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.07, 28.07, 21.52]

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:79.9181
Grand average of hydropathicity (GRAVY):-0.47