Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5804
Number of amino acids:147
Molecular Weight:15936.26 Da
Theoretical pI:6.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)74.76%
Cysteine CYS (C)1610.88%
Glutamic Acid GLU (E)96.12%
Aspartic Acid ASP (D)42.72%
Glycine GLY (G)1711.56%
Phynylalanine PHE (F)74.76%
Isoleucine ILE (I)74.76%
Histidine HIS (H)10.68%
Lysine LYS (K)96.12%
Methionine MET (M)32.04%
Leucine LEU (L)85.44%
Asparagine ASN (N)85.44%
Glutamine GLN (Q)00%
Proline PRO (P)106.8%
Serine SER (S)117.48%
Arginine ARG (R)42.72%
Threonine THR (T)96.12%
Tryptophan TRP (W)00%
Valine VAL (V)64.08%
Tyrosine TYR (Y)117.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC696
HydrogenH1058
NitrogenN178
OxygenO213
SulphurS19

FormulaC696H1058N178O213S19
Total Number of Atoms:2164


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17390
Absorption 0.1% (=1 g/l)    1.091,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16390
Absorption 0.1% (=1 g/l)    1.028,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.48

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.53, 31.29, 18.37]

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:56.3945
Grand average of hydropathicity (GRAVY):-0.12