Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5982
Number of amino acids:162
Molecular Weight:17863.29 Da
Theoretical pI:5.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)106.17%
Cysteine CYS (C)42.47%
Glutamic Acid GLU (E)106.17%
Aspartic Acid ASP (D)84.94%
Glycine GLY (G)127.41%
Phynylalanine PHE (F)53.09%
Isoleucine ILE (I)148.64%
Histidine HIS (H)31.85%
Lysine LYS (K)84.94%
Methionine MET (M)31.85%
Leucine LEU (L)148.64%
Asparagine ASN (N)116.79%
Glutamine GLN (Q)21.23%
Proline PRO (P)95.56%
Serine SER (S)127.41%
Arginine ARG (R)63.7%
Threonine THR (T)148.64%
Tryptophan TRP (W)21.23%
Valine VAL (V)84.94%
Tyrosine TYR (Y)74.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC794
HydrogenH1245
NitrogenN209
OxygenO245
SulphurS7

FormulaC794H1245N209O245S7
Total Number of Atoms:2500


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):18
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21680
Absorption 0.1% (=1 g/l)    1.214,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21430
Absorption 0.1% (=1 g/l)    1.200,   assuming all CYS residues are reduced
Aromaticity:0.086

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.86, 27.16, 22.84]

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:87.9013
Grand average of hydropathicity (GRAVY):-0.17