Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5077
Number of amino acids:222
Molecular Weight:25746.93 Da
Theoretical pI:8.87


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)52.25%
Cysteine CYS (C)94.05%
Glutamic Acid GLU (E)125.41%
Aspartic Acid ASP (D)125.41%
Glycine GLY (G)94.05%
Phynylalanine PHE (F)94.05%
Isoleucine ILE (I)177.66%
Histidine HIS (H)83.6%
Lysine LYS (K)2410.81%
Methionine MET (M)62.7%
Leucine LEU (L)188.11%
Asparagine ASN (N)156.76%
Glutamine GLN (Q)73.15%
Proline PRO (P)156.76%
Serine SER (S)125.41%
Arginine ARG (R)73.15%
Threonine THR (T)125.41%
Tryptophan TRP (W)41.8%
Valine VAL (V)135.86%
Tyrosine TYR (Y)83.6%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1158
HydrogenH1815
NitrogenN309
OxygenO325
SulphurS15

FormulaC1158H1815N309O325S15
Total Number of Atoms:3622


Total number of positively charged residues (ARG + LYS):31
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    34420
Absorption 0.1% (=1 g/l)    1.337,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.317,   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 : 37.08

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.08, 22.97, 18.47]

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:80.7207
Grand average of hydropathicity (GRAVY):-0.47