Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4819
Number of amino acids:253
Molecular Weight:27260.32 Da
Theoretical pI:6.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.32%
Cysteine CYS (C)83.16%
Glutamic Acid GLU (E)31.19%
Aspartic Acid ASP (D)114.35%
Glycine GLY (G)3513.83%
Phynylalanine PHE (F)124.74%
Isoleucine ILE (I)114.35%
Histidine HIS (H)51.98%
Lysine LYS (K)62.37%
Methionine MET (M)62.37%
Leucine LEU (L)166.32%
Asparagine ASN (N)197.51%
Glutamine GLN (Q)166.32%
Proline PRO (P)114.35%
Serine SER (S)228.7%
Arginine ARG (R)72.77%
Threonine THR (T)187.11%
Tryptophan TRP (W)72.77%
Valine VAL (V)124.74%
Tyrosine TYR (Y)124.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1203
HydrogenH1794
NitrogenN332
OxygenO369
SulphurS14

FormulaC1203H1794N332O369S14
Total Number of Atoms:3712


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):14
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    56880
Absorption 0.1% (=1 g/l)    2.087,   assuming all pairs of CYS residues form cystines

Ext. coefficient    56380
Absorption 0.1% (=1 g/l)    2.068,   assuming all CYS residues are reduced
Aromaticity:0.123

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.47

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.67, 34.39, 16.21]

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:61.6996
Grand average of hydropathicity (GRAVY):-0.28