Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5971
Number of amino acids:151
Molecular Weight:16995.44 Da
Theoretical pI:8.09


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1811.92%
Cysteine CYS (C)10.66%
Glutamic Acid GLU (E)10.66%
Aspartic Acid ASP (D)42.65%
Glycine GLY (G)53.31%
Phynylalanine PHE (F)85.3%
Isoleucine ILE (I)106.62%
Histidine HIS (H)31.99%
Lysine LYS (K)10.66%
Methionine MET (M)10.66%
Leucine LEU (L)2113.91%
Asparagine ASN (N)85.3%
Glutamine GLN (Q)2415.89%
Proline PRO (P)53.31%
Serine SER (S)117.28%
Arginine ARG (R)53.31%
Threonine THR (T)53.31%
Tryptophan TRP (W)10.66%
Valine VAL (V)106.62%
Tyrosine TYR (Y)95.96%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC777
HydrogenH1200
NitrogenN206
OxygenO219
SulphurS2

FormulaC777H1200N206O219S2
Total Number of Atoms:2404


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    18910
Absorption 0.1% (=1 g/l)    1.113,   assuming all pairs of CYS residues form cystines

Ext. coefficient    18910
Absorption 0.1% (=1 g/l)    1.113,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 57.39

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[39.07, 19.21, 27.15]

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:111.192
Grand average of hydropathicity (GRAVY):0.17