Physicochemical Properties of Peptide



PPepDB ID:PPepDB_631
Number of amino acids:207
Molecular Weight:22205.03 Da
Theoretical pI:8.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)167.73%
Cysteine CYS (C)167.73%
Glutamic Acid GLU (E)62.9%
Aspartic Acid ASP (D)136.28%
Glycine GLY (G)2411.59%
Phynylalanine PHE (F)115.31%
Isoleucine ILE (I)83.86%
Histidine HIS (H)00%
Lysine LYS (K)115.31%
Methionine MET (M)10.48%
Leucine LEU (L)94.35%
Asparagine ASN (N)94.35%
Glutamine GLN (Q)41.93%
Proline PRO (P)125.8%
Serine SER (S)146.76%
Arginine ARG (R)125.8%
Threonine THR (T)209.66%
Tryptophan TRP (W)31.45%
Valine VAL (V)104.83%
Tyrosine TYR (Y)83.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC963
HydrogenH1484
NitrogenN270
OxygenO301
SulphurS17

FormulaC963H1484N270O301S17
Total Number of Atoms:3035


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.325,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.280,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.14

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.67, 28.50, 15.46]

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:53.7681
Grand average of hydropathicity (GRAVY):-0.30