Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4152
Number of amino acids:214
Molecular Weight:23887.4 Da
Theoretical pI:8.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)177.94%
Cysteine CYS (C)73.27%
Glutamic Acid GLU (E)115.14%
Aspartic Acid ASP (D)62.8%
Glycine GLY (G)125.61%
Phynylalanine PHE (F)83.74%
Isoleucine ILE (I)73.27%
Histidine HIS (H)20.93%
Lysine LYS (K)146.54%
Methionine MET (M)52.34%
Leucine LEU (L)188.41%
Asparagine ASN (N)125.61%
Glutamine GLN (Q)83.74%
Proline PRO (P)167.48%
Serine SER (S)157.01%
Arginine ARG (R)83.74%
Threonine THR (T)177.94%
Tryptophan TRP (W)41.87%
Valine VAL (V)157.01%
Tyrosine TYR (Y)125.61%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1074
HydrogenH1660
NitrogenN280
OxygenO313
SulphurS12

FormulaC1074H1660N280O313S12
Total Number of Atoms:3339


Total number of positively charged residues (ARG + LYS):22
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    40255
Absorption 0.1% (=1 g/l)    1.685,   assuming all pairs of CYS residues form cystines

Ext. coefficient    39880
Absorption 0.1% (=1 g/l)    1.669,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.24

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.91, 25.70, 23.83]

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:73.8318
Grand average of hydropathicity (GRAVY):-0.27