Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1319
Number of amino acids:229
Molecular Weight:24072.09 Da
Theoretical pI:6.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.99%
Cysteine CYS (C)177.42%
Glutamic Acid GLU (E)41.75%
Aspartic Acid ASP (D)93.93%
Glycine GLY (G)2410.48%
Phynylalanine PHE (F)83.49%
Isoleucine ILE (I)104.37%
Histidine HIS (H)20.87%
Lysine LYS (K)83.49%
Methionine MET (M)52.18%
Leucine LEU (L)166.99%
Asparagine ASN (N)208.73%
Glutamine GLN (Q)52.18%
Proline PRO (P)156.55%
Serine SER (S)229.61%
Arginine ARG (R)41.75%
Threonine THR (T)2410.48%
Tryptophan TRP (W)31.31%
Valine VAL (V)83.49%
Tyrosine TYR (Y)93.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1036
HydrogenH1599
NitrogenN281
OxygenO336
SulphurS22

FormulaC1036H1599N281O336S22
Total Number of Atoms:3274


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30910
Absorption 0.1% (=1 g/l)    1.284,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.243,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.58, 35.37, 17.90]

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:61.3974
Grand average of hydropathicity (GRAVY):-0.12