Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1134
Number of amino acids:89
Molecular Weight:9309.01 Da
Theoretical pI:8.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1213.48%
Cysteine CYS (C)66.74%
Glutamic Acid GLU (E)55.62%
Aspartic Acid ASP (D)11.12%
Glycine GLY (G)910.11%
Phynylalanine PHE (F)22.25%
Isoleucine ILE (I)44.49%
Histidine HIS (H)00%
Lysine LYS (K)55.62%
Methionine MET (M)33.37%
Leucine LEU (L)1112.36%
Asparagine ASN (N)33.37%
Glutamine GLN (Q)33.37%
Proline PRO (P)33.37%
Serine SER (S)44.49%
Arginine ARG (R)44.49%
Threonine THR (T)66.74%
Tryptophan TRP (W)00%
Valine VAL (V)66.74%
Tyrosine TYR (Y)22.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC404
HydrogenH674
NitrogenN112
OxygenO120
SulphurS9

FormulaC404H674N112O120S9
Total Number of Atoms:1319


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):6
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    3355
Absorption 0.1% (=1 g/l)    0.360,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.320,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.09, 21.35, 34.83]

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:98.7642
Grand average of hydropathicity (GRAVY):0.39