Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5175
Number of amino acids:340
Molecular Weight:36409.56 Da
Theoretical pI:4.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.06%
Cysteine CYS (C)216.18%
Glutamic Acid GLU (E)113.24%
Aspartic Acid ASP (D)288.24%
Glycine GLY (G)5215.29%
Phynylalanine PHE (F)154.41%
Isoleucine ILE (I)154.41%
Histidine HIS (H)20.59%
Lysine LYS (K)144.12%
Methionine MET (M)41.18%
Leucine LEU (L)247.06%
Asparagine ASN (N)133.82%
Glutamine GLN (Q)144.12%
Proline PRO (P)205.88%
Serine SER (S)226.47%
Arginine ARG (R)102.94%
Threonine THR (T)154.41%
Tryptophan TRP (W)82.35%
Valine VAL (V)92.65%
Tyrosine TYR (Y)195.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1603
HydrogenH2379
NitrogenN423
OxygenO502
SulphurS25

FormulaC1603H2379N423O502S25
Total Number of Atoms:4932


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    73560
Absorption 0.1% (=1 g/l)    2.020,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72310
Absorption 0.1% (=1 g/l)    1.986,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.47, 31.47, 18.53]

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:59.4706
Grand average of hydropathicity (GRAVY):-0.32