Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5930
Number of amino acids:187
Molecular Weight:20302.5 Da
Theoretical pI:9.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)73.74%
Cysteine CYS (C)42.14%
Glutamic Acid GLU (E)84.28%
Aspartic Acid ASP (D)31.6%
Glycine GLY (G)158.02%
Phynylalanine PHE (F)84.28%
Isoleucine ILE (I)73.74%
Histidine HIS (H)63.21%
Lysine LYS (K)147.49%
Methionine MET (M)84.28%
Leucine LEU (L)2111.23%
Asparagine ASN (N)115.88%
Glutamine GLN (Q)31.6%
Proline PRO (P)158.02%
Serine SER (S)2714.44%
Arginine ARG (R)31.6%
Threonine THR (T)94.81%
Tryptophan TRP (W)31.6%
Valine VAL (V)115.88%
Tyrosine TYR (Y)42.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC908
HydrogenH1429
NitrogenN239
OxygenO264
SulphurS12

FormulaC908H1429N239O264S12
Total Number of Atoms:2852


Total number of positively charged residues (ARG + LYS):17
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    22710
Absorption 0.1% (=1 g/l)    1.119,   assuming all pairs of CYS residues form cystines

Ext. coefficient    22460
Absorption 0.1% (=1 g/l)    1.106,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 51.13

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.88, 36.36, 23.53]

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:79.1977
Grand average of hydropathicity (GRAVY):-0.12