Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6139
Number of amino acids:89
Molecular Weight:10376.1 Da
Theoretical pI:9.58


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.12%
Cysteine CYS (C)88.99%
Glutamic Acid GLU (E)22.25%
Aspartic Acid ASP (D)11.12%
Glycine GLY (G)66.74%
Phynylalanine PHE (F)55.62%
Isoleucine ILE (I)66.74%
Histidine HIS (H)22.25%
Lysine LYS (K)66.74%
Methionine MET (M)22.25%
Leucine LEU (L)55.62%
Asparagine ASN (N)77.87%
Glutamine GLN (Q)1112.36%
Proline PRO (P)33.37%
Serine SER (S)33.37%
Arginine ARG (R)66.74%
Threonine THR (T)77.87%
Tryptophan TRP (W)33.37%
Valine VAL (V)55.62%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC451
HydrogenH716
NitrogenN138
OxygenO124
SulphurS10

FormulaC451H716N138O124S10
Total Number of Atoms:1439


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17000
Absorption 0.1% (=1 g/l)    1.638,   assuming all pairs of CYS residues form cystines

Ext. coefficient    16500
Absorption 0.1% (=1 g/l)    1.590,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.22

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.97, 21.35, 11.24]

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:65.618
Grand average of hydropathicity (GRAVY):-0.46