Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1097
Number of amino acids:134
Molecular Weight:13883.86 Da
Theoretical pI:7.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1410.45%
Cysteine CYS (C)128.96%
Glutamic Acid GLU (E)42.99%
Aspartic Acid ASP (D)53.73%
Glycine GLY (G)96.72%
Phynylalanine PHE (F)21.49%
Isoleucine ILE (I)85.97%
Histidine HIS (H)00%
Lysine LYS (K)75.22%
Methionine MET (M)21.49%
Leucine LEU (L)85.97%
Asparagine ASN (N)96.72%
Glutamine GLN (Q)53.73%
Proline PRO (P)75.22%
Serine SER (S)1611.94%
Arginine ARG (R)32.24%
Threonine THR (T)96.72%
Tryptophan TRP (W)00%
Valine VAL (V)107.46%
Tyrosine TYR (Y)42.99%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC586
HydrogenH956
NitrogenN164
OxygenO196
SulphurS14

FormulaC586H956N164O196S14
Total Number of Atoms:1916


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):9
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    6710
Absorption 0.1% (=1 g/l)    0.483,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.429,   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 : 31.17

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.88, 30.60, 20.90]

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:78.6568
Grand average of hydropathicity (GRAVY):0.09