Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1150
Number of amino acids:182
Molecular Weight:18742.96 Da
Theoretical pI:4.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)147.69%
Cysteine CYS (C)105.49%
Glutamic Acid GLU (E)31.65%
Aspartic Acid ASP (D)84.4%
Glycine GLY (G)2614.29%
Phynylalanine PHE (F)63.3%
Isoleucine ILE (I)84.4%
Histidine HIS (H)21.1%
Lysine LYS (K)21.1%
Methionine MET (M)21.1%
Leucine LEU (L)147.69%
Asparagine ASN (N)116.04%
Glutamine GLN (Q)94.95%
Proline PRO (P)126.59%
Serine SER (S)168.79%
Arginine ARG (R)31.65%
Threonine THR (T)147.69%
Tryptophan TRP (W)31.65%
Valine VAL (V)126.59%
Tyrosine TYR (Y)73.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC818
HydrogenH1250
NitrogenN220
OxygenO262
SulphurS12

FormulaC818H1250N220O262S12
Total Number of Atoms:2562


Total number of positively charged residues (ARG + LYS):5
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    27555
Absorption 0.1% (=1 g/l)    1.470,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.437,   assuming all CYS residues are reduced
Aromaticity:0.088

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.47, 35.71, 18.13]

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:73.956
Grand average of hydropathicity (GRAVY):0.06