Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5882
Number of amino acids:299
Molecular Weight:34687.18 Da
Theoretical pI:8.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)103.34%
Cysteine CYS (C)41.34%
Glutamic Acid GLU (E)124.01%
Aspartic Acid ASP (D)186.02%
Glycine GLY (G)206.69%
Phynylalanine PHE (F)196.35%
Isoleucine ILE (I)206.69%
Histidine HIS (H)72.34%
Lysine LYS (K)175.69%
Methionine MET (M)51.67%
Leucine LEU (L)227.36%
Asparagine ASN (N)196.35%
Glutamine GLN (Q)144.68%
Proline PRO (P)113.68%
Serine SER (S)3010.03%
Arginine ARG (R)155.02%
Threonine THR (T)134.35%
Tryptophan TRP (W)124.01%
Valine VAL (V)186.02%
Tyrosine TYR (Y)134.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1578
HydrogenH2360
NitrogenN420
OxygenO449
SulphurS9

FormulaC1578H2360N420O449S9
Total Number of Atoms:4816


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    85620
Absorption 0.1% (=1 g/l)    2.468,   assuming all pairs of CYS residues form cystines

Ext. coefficient    85370
Absorption 0.1% (=1 g/l)    2.461,   assuming all CYS residues are reduced
Aromaticity:0.147

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.89

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.78, 26.76, 16.39]

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:75.5853
Grand average of hydropathicity (GRAVY):-0.41