Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1124
Number of amino acids:238
Molecular Weight:25787.34 Da
Theoretical pI:4.62


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.72%
Cysteine CYS (C)166.72%
Glutamic Acid GLU (E)104.2%
Aspartic Acid ASP (D)145.88%
Glycine GLY (G)229.24%
Phynylalanine PHE (F)166.72%
Isoleucine ILE (I)125.04%
Histidine HIS (H)20.84%
Lysine LYS (K)135.46%
Methionine MET (M)41.68%
Leucine LEU (L)208.4%
Asparagine ASN (N)166.72%
Glutamine GLN (Q)62.52%
Proline PRO (P)187.56%
Serine SER (S)166.72%
Arginine ARG (R)20.84%
Threonine THR (T)145.88%
Tryptophan TRP (W)31.26%
Valine VAL (V)93.78%
Tyrosine TYR (Y)93.78%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1151
HydrogenH1734
NitrogenN286
OxygenO348
SulphurS20

FormulaC1151H1734N286O348S20
Total Number of Atoms:3539


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):24
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)    1.199,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.160,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.81

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.99, 30.25, 21.01]

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:70.1261
Grand average of hydropathicity (GRAVY):-0.05