Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5712
Number of amino acids:320
Molecular Weight:35596.24 Da
Theoretical pI:8.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.94%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)195.94%
Aspartic Acid ASP (D)123.75%
Glycine GLY (G)247.5%
Phynylalanine PHE (F)144.38%
Isoleucine ILE (I)299.06%
Histidine HIS (H)20.63%
Lysine LYS (K)216.56%
Methionine MET (M)61.88%
Leucine LEU (L)247.5%
Asparagine ASN (N)185.63%
Glutamine GLN (Q)185.63%
Proline PRO (P)247.5%
Serine SER (S)175.31%
Arginine ARG (R)154.69%
Threonine THR (T)113.44%
Tryptophan TRP (W)10.31%
Valine VAL (V)319.69%
Tyrosine TYR (Y)134.06%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1616
HydrogenH2569
NitrogenN427
OxygenO460
SulphurS8

FormulaC1616H2569N427O460S8
Total Number of Atoms:5080


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):31
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    24995
Absorption 0.1% (=1 g/l)    0.702,   assuming all pairs of CYS residues form cystines

Ext. coefficient    24870
Absorption 0.1% (=1 g/l)    0.699,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.87

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.00, 25.94, 21.25]

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:98.625
Grand average of hydropathicity (GRAVY):-0.11