Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1084
Number of amino acids:113
Molecular Weight:12162.37 Da
Theoretical pI:5.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)97.96%
Cysteine CYS (C)65.31%
Glutamic Acid GLU (E)65.31%
Aspartic Acid ASP (D)43.54%
Glycine GLY (G)54.42%
Phynylalanine PHE (F)54.42%
Isoleucine ILE (I)76.19%
Histidine HIS (H)10.88%
Lysine LYS (K)76.19%
Methionine MET (M)43.54%
Leucine LEU (L)1311.5%
Asparagine ASN (N)65.31%
Glutamine GLN (Q)00%
Proline PRO (P)54.42%
Serine SER (S)87.08%
Arginine ARG (R)21.77%
Threonine THR (T)119.73%
Tryptophan TRP (W)00%
Valine VAL (V)1210.62%
Tyrosine TYR (Y)21.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC541
HydrogenH884
NitrogenN134
OxygenO161
SulphurS10

FormulaC541H884N134O161S10
Total Number of Atoms:1730


Total number of positively charged residues (ARG + LYS):9
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)    0.276,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.245,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.51, 21.24, 28.32]

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:107.788
Grand average of hydropathicity (GRAVY):0.55