Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6151
Number of amino acids:89
Molecular Weight:10277.12 Da
Theoretical pI:8.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.12%
Cysteine CYS (C)88.99%
Glutamic Acid GLU (E)55.62%
Aspartic Acid ASP (D)44.49%
Glycine GLY (G)55.62%
Phynylalanine PHE (F)22.25%
Isoleucine ILE (I)33.37%
Histidine HIS (H)33.37%
Lysine LYS (K)1011.24%
Methionine MET (M)55.62%
Leucine LEU (L)910.11%
Asparagine ASN (N)22.25%
Glutamine GLN (Q)44.49%
Proline PRO (P)11.12%
Serine SER (S)66.74%
Arginine ARG (R)33.37%
Threonine THR (T)77.87%
Tryptophan TRP (W)11.12%
Valine VAL (V)66.74%
Tyrosine TYR (Y)44.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC445
HydrogenH719
NitrogenN121
OxygenO131
SulphurS13

FormulaC445H719N121O131S13
Total Number of Atoms:1429


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):9
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11960
Absorption 0.1% (=1 g/l)    1.164,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    1.115,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.09, 15.73, 22.47]

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:73.2586
Grand average of hydropathicity (GRAVY):-0.27