Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5794
Number of amino acids:187
Molecular Weight:21453.37 Da
Theoretical pI:5.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)94.81%
Cysteine CYS (C)31.6%
Glutamic Acid GLU (E)136.95%
Aspartic Acid ASP (D)73.74%
Glycine GLY (G)105.35%
Phynylalanine PHE (F)105.35%
Isoleucine ILE (I)136.95%
Histidine HIS (H)115.88%
Lysine LYS (K)73.74%
Methionine MET (M)42.14%
Leucine LEU (L)147.49%
Asparagine ASN (N)73.74%
Glutamine GLN (Q)84.28%
Proline PRO (P)136.95%
Serine SER (S)147.49%
Arginine ARG (R)73.74%
Threonine THR (T)126.42%
Tryptophan TRP (W)52.67%
Valine VAL (V)136.95%
Tyrosine TYR (Y)73.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC977
HydrogenH1467
NitrogenN257
OxygenO276
SulphurS7

FormulaC977H1467N257O276S7
Total Number of Atoms:2984


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    38055
Absorption 0.1% (=1 g/l)    1.774,   assuming all pairs of CYS residues form cystines

Ext. coefficient    37930
Absorption 0.1% (=1 g/l)    1.768,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 62.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.16, 23.53, 21.39]

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:81.2834
Grand average of hydropathicity (GRAVY):-0.26