Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5566
Number of amino acids:327
Molecular Weight:35290.7 Da
Theoretical pI:8.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)278.26%
Cysteine CYS (C)175.2%
Glutamic Acid GLU (E)51.53%
Aspartic Acid ASP (D)185.5%
Glycine GLY (G)4012.23%
Phynylalanine PHE (F)144.28%
Isoleucine ILE (I)133.98%
Histidine HIS (H)30.92%
Lysine LYS (K)113.36%
Methionine MET (M)61.83%
Leucine LEU (L)195.81%
Asparagine ASN (N)133.98%
Glutamine GLN (Q)175.2%
Proline PRO (P)195.81%
Serine SER (S)288.56%
Arginine ARG (R)175.2%
Threonine THR (T)216.42%
Tryptophan TRP (W)82.45%
Valine VAL (V)154.59%
Tyrosine TYR (Y)164.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1550
HydrogenH2349
NitrogenN433
OxygenO469
SulphurS23

FormulaC1550H2349N433O469S23
Total Number of Atoms:4824


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    68840
Absorption 0.1% (=1 g/l)    1.951,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67840
Absorption 0.1% (=1 g/l)    1.922,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.99, 30.58, 17.43]

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:59.7248
Grand average of hydropathicity (GRAVY):-0.28