Physicochemical Properties of Peptide



PPepDB ID:PPepDB_593
Number of amino acids:106
Molecular Weight:11316.1 Da
Theoretical pI:4.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)109.43%
Cysteine CYS (C)65.66%
Glutamic Acid GLU (E)76.6%
Aspartic Acid ASP (D)32.83%
Glycine GLY (G)76.6%
Phynylalanine PHE (F)43.77%
Isoleucine ILE (I)76.6%
Histidine HIS (H)10.94%
Lysine LYS (K)43.77%
Methionine MET (M)54.72%
Leucine LEU (L)98.49%
Asparagine ASN (N)109.43%
Glutamine GLN (Q)10.94%
Proline PRO (P)65.66%
Serine SER (S)65.66%
Arginine ARG (R)21.89%
Threonine THR (T)87.55%
Tryptophan TRP (W)00%
Valine VAL (V)87.55%
Tyrosine TYR (Y)21.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC491
HydrogenH789
NitrogenN129
OxygenO154
SulphurS11

FormulaC491H789N129O154S11
Total Number of Atoms:1574


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):10
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)    0.296,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.263,   assuming all CYS residues are reduced
Aromaticity:0.057

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 22.16

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.30, 27.36, 29.25]

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:90.1887
Grand average of hydropathicity (GRAVY):0.25