Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1366
Number of amino acids:229
Molecular Weight:24473.41 Da
Theoretical pI:4.66


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)177.42%
Cysteine CYS (C)177.42%
Glutamic Acid GLU (E)62.62%
Aspartic Acid ASP (D)146.11%
Glycine GLY (G)2410.48%
Phynylalanine PHE (F)135.68%
Isoleucine ILE (I)93.93%
Histidine HIS (H)20.87%
Lysine LYS (K)52.18%
Methionine MET (M)31.31%
Leucine LEU (L)135.68%
Asparagine ASN (N)166.99%
Glutamine GLN (Q)83.49%
Proline PRO (P)177.42%
Serine SER (S)177.42%
Arginine ARG (R)83.49%
Threonine THR (T)177.42%
Tryptophan TRP (W)41.75%
Valine VAL (V)125.24%
Tyrosine TYR (Y)73.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1065
HydrogenH1606
NitrogenN290
OxygenO335
SulphurS20

FormulaC1065H1606N290O335S20
Total Number of Atoms:3316


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33430
Absorption 0.1% (=1 g/l)    1.366,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32430
Absorption 0.1% (=1 g/l)    1.325,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.33, 32.31, 17.03]

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:60.0873
Grand average of hydropathicity (GRAVY):-0.15