Physicochemical Properties of Peptide



PPepDB ID:PPepDB_803
Number of amino acids:245
Molecular Weight:26121.88 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2510.2%
Cysteine CYS (C)166.53%
Glutamic Acid GLU (E)20.82%
Aspartic Acid ASP (D)104.08%
Glycine GLY (G)2510.2%
Phynylalanine PHE (F)135.31%
Isoleucine ILE (I)93.67%
Histidine HIS (H)62.45%
Lysine LYS (K)114.49%
Methionine MET (M)41.63%
Leucine LEU (L)166.53%
Asparagine ASN (N)93.67%
Glutamine GLN (Q)52.04%
Proline PRO (P)187.35%
Serine SER (S)208.16%
Arginine ARG (R)114.49%
Threonine THR (T)208.16%
Tryptophan TRP (W)31.22%
Valine VAL (V)114.49%
Tyrosine TYR (Y)114.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1156
HydrogenH1768
NitrogenN318
OxygenO335
SulphurS20

FormulaC1156H1768N318O335S20
Total Number of Atoms:3597


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33890
Absorption 0.1% (=1 g/l)    1.297,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.259,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.01

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.71, 29.39, 19.18]

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:63.0204
Grand average of hydropathicity (GRAVY):-0.05