Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6017
Number of amino acids:89
Molecular Weight:9885.46 Da
Theoretical pI:6.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)55.62%
Cysteine CYS (C)88.99%
Glutamic Acid GLU (E)55.62%
Aspartic Acid ASP (D)55.62%
Glycine GLY (G)1011.24%
Phynylalanine PHE (F)910.11%
Isoleucine ILE (I)77.87%
Histidine HIS (H)00%
Lysine LYS (K)55.62%
Methionine MET (M)11.12%
Leucine LEU (L)33.37%
Asparagine ASN (N)33.37%
Glutamine GLN (Q)33.37%
Proline PRO (P)44.49%
Serine SER (S)33.37%
Arginine ARG (R)55.62%
Threonine THR (T)33.37%
Tryptophan TRP (W)11.12%
Valine VAL (V)77.87%
Tyrosine TYR (Y)22.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC442
HydrogenH674
NitrogenN116
OxygenO124
SulphurS9

FormulaC442H674N116O124S9
Total Number of Atoms:1365


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):10
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8980
Absorption 0.1% (=1 g/l)    0.908,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.858,   assuming all CYS residues are reduced
Aromaticity:0.135

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.99

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.58, 22.47, 15.73]

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:72.2472
Grand average of hydropathicity (GRAVY):0.14