Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4933
Number of amino acids:221
Molecular Weight:24039.07 Da
Theoretical pI:5.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.24%
Cysteine CYS (C)73.17%
Glutamic Acid GLU (E)62.71%
Aspartic Acid ASP (D)198.6%
Glycine GLY (G)198.6%
Phynylalanine PHE (F)104.52%
Isoleucine ILE (I)94.07%
Histidine HIS (H)20.9%
Lysine LYS (K)135.88%
Methionine MET (M)20.9%
Leucine LEU (L)167.24%
Asparagine ASN (N)104.52%
Glutamine GLN (Q)62.71%
Proline PRO (P)73.17%
Serine SER (S)219.5%
Arginine ARG (R)104.52%
Threonine THR (T)167.24%
Tryptophan TRP (W)62.71%
Valine VAL (V)219.5%
Tyrosine TYR (Y)52.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1061
HydrogenH1652
NitrogenN290
OxygenO330
SulphurS9

FormulaC1061H1652N290O330S9
Total Number of Atoms:3342


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40825
Absorption 0.1% (=1 g/l)    1.698,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40450
Absorption 0.1% (=1 g/l)    1.683,   assuming all CYS residues are reduced
Aromaticity:0.095

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]:[30.32, 25.79, 18.10]

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:78.914
Grand average of hydropathicity (GRAVY):-0.17