Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4278
Number of amino acids:113
Molecular Weight:11685.79 Da
Theoretical pI:9.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1210.62%
Cysteine CYS (C)97.96%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)43.54%
Glycine GLY (G)119.73%
Phynylalanine PHE (F)21.77%
Isoleucine ILE (I)76.19%
Histidine HIS (H)00%
Lysine LYS (K)54.42%
Methionine MET (M)21.77%
Leucine LEU (L)1311.5%
Asparagine ASN (N)76.19%
Glutamine GLN (Q)32.65%
Proline PRO (P)76.19%
Serine SER (S)76.19%
Arginine ARG (R)65.31%
Threonine THR (T)87.08%
Tryptophan TRP (W)00%
Valine VAL (V)87.08%
Tyrosine TYR (Y)21.77%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC504
HydrogenH844
NitrogenN146
OxygenO149
SulphurS11

FormulaC504H844N146O149S11
Total Number of Atoms:1654


Total number of positively charged residues (ARG + LYS):11
Total number of negatively charged residues (ASP + GLU):4
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    3480
Absorption 0.1% (=1 g/l)    0.298,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.255,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.32, 28.32, 23.89]

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:100.177
Grand average of hydropathicity (GRAVY):0.38