Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5157
Number of amino acids:228
Molecular Weight:25791.49 Da
Theoretical pI:8.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)73.07%
Cysteine CYS (C)83.51%
Glutamic Acid GLU (E)73.07%
Aspartic Acid ASP (D)104.39%
Glycine GLY (G)135.7%
Phynylalanine PHE (F)93.95%
Isoleucine ILE (I)146.14%
Histidine HIS (H)52.19%
Lysine LYS (K)156.58%
Methionine MET (M)73.07%
Leucine LEU (L)146.14%
Asparagine ASN (N)177.46%
Glutamine GLN (Q)135.7%
Proline PRO (P)167.02%
Serine SER (S)156.58%
Arginine ARG (R)93.95%
Threonine THR (T)2310.09%
Tryptophan TRP (W)41.75%
Valine VAL (V)146.14%
Tyrosine TYR (Y)83.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1140
HydrogenH1782
NitrogenN314
OxygenO339
SulphurS15

FormulaC1140H1782N314O339S15
Total Number of Atoms:3590


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):17
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)    1.335,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.315,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.83

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.63, 26.75, 15.35]

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:68.7719
Grand average of hydropathicity (GRAVY):-0.47