Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6136
Number of amino acids:151
Molecular Weight:16532.12 Da
Theoretical pI:8.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)117.28%
Cysteine CYS (C)95.96%
Glutamic Acid GLU (E)42.65%
Aspartic Acid ASP (D)31.99%
Glycine GLY (G)95.96%
Phynylalanine PHE (F)42.65%
Isoleucine ILE (I)95.96%
Histidine HIS (H)31.99%
Lysine LYS (K)31.99%
Methionine MET (M)85.3%
Leucine LEU (L)138.61%
Asparagine ASN (N)127.95%
Glutamine GLN (Q)63.97%
Proline PRO (P)63.97%
Serine SER (S)1912.58%
Arginine ARG (R)95.96%
Threonine THR (T)74.64%
Tryptophan TRP (W)21.32%
Valine VAL (V)106.62%
Tyrosine TYR (Y)42.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC709
HydrogenH1139
NitrogenN207
OxygenO214
SulphurS17

FormulaC709H1139N207O214S17
Total Number of Atoms:2286


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):7
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17460
Absorption 0.1% (=1 g/l)    1.056,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16960
Absorption 0.1% (=1 g/l)    1.026,   assuming all CYS residues are reduced
Aromaticity:0.066

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 54.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.81, 30.46, 23.84]

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:83.3112
Grand average of hydropathicity (GRAVY):0.07