Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4480
Number of amino acids:204
Molecular Weight:21859.28 Da
Theoretical pI:5.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)125.88%
Cysteine CYS (C)157.35%
Glutamic Acid GLU (E)41.96%
Aspartic Acid ASP (D)136.37%
Glycine GLY (G)2512.25%
Phynylalanine PHE (F)62.94%
Isoleucine ILE (I)62.94%
Histidine HIS (H)52.45%
Lysine LYS (K)83.92%
Methionine MET (M)20.98%
Leucine LEU (L)136.37%
Asparagine ASN (N)157.35%
Glutamine GLN (Q)94.41%
Proline PRO (P)52.45%
Serine SER (S)209.8%
Arginine ARG (R)52.45%
Threonine THR (T)125.88%
Tryptophan TRP (W)62.94%
Valine VAL (V)157.35%
Tyrosine TYR (Y)83.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC940
HydrogenH1425
NitrogenN267
OxygenO303
SulphurS17

FormulaC940H1425N267O303S17
Total Number of Atoms:2952


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    45795
Absorption 0.1% (=1 g/l)    2.095,   assuming all pairs of CYS residues form cystines

Ext. coefficient    44920
Absorption 0.1% (=1 g/l)    2.055,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.47, 31.86, 15.20]

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:63.5294
Grand average of hydropathicity (GRAVY):-0.26