Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4747
Number of amino acids:456
Molecular Weight:51202.65 Da
Theoretical pI:8.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)265.7%
Cysteine CYS (C)173.73%
Glutamic Acid GLU (E)112.41%
Aspartic Acid ASP (D)173.73%
Glycine GLY (G)286.14%
Phynylalanine PHE (F)296.36%
Isoleucine ILE (I)194.17%
Histidine HIS (H)71.54%
Lysine LYS (K)235.04%
Methionine MET (M)122.63%
Leucine LEU (L)296.36%
Asparagine ASN (N)265.7%
Glutamine GLN (Q)204.39%
Proline PRO (P)327.02%
Serine SER (S)367.89%
Arginine ARG (R)173.73%
Threonine THR (T)439.43%
Tryptophan TRP (W)143.07%
Valine VAL (V)337.24%
Tyrosine TYR (Y)173.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2315
HydrogenH3500
NitrogenN604
OxygenO655
SulphurS29

FormulaC2315H3500N604O655S29
Total Number of Atoms:7103


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):28
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    103330
Absorption 0.1% (=1 g/l)    2.018,   assuming all pairs of CYS residues form cystines

Ext. coefficient    102330
Absorption 0.1% (=1 g/l)    1.999,   assuming all CYS residues are reduced
Aromaticity:0.132

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.92, 26.75, 17.11]

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:67.7412
Grand average of hydropathicity (GRAVY):-0.17