Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5445
Number of amino acids:465
Molecular Weight:52578.6 Da
Theoretical pI:6.1


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)234.95%
Cysteine CYS (C)91.94%
Glutamic Acid GLU (E)255.38%
Aspartic Acid ASP (D)224.73%
Glycine GLY (G)357.53%
Phynylalanine PHE (F)306.45%
Isoleucine ILE (I)245.16%
Histidine HIS (H)102.15%
Lysine LYS (K)194.09%
Methionine MET (M)112.37%
Leucine LEU (L)418.82%
Asparagine ASN (N)306.45%
Glutamine GLN (Q)112.37%
Proline PRO (P)275.81%
Serine SER (S)439.25%
Arginine ARG (R)234.95%
Threonine THR (T)224.73%
Tryptophan TRP (W)91.94%
Valine VAL (V)286.02%
Tyrosine TYR (Y)234.95%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2379
HydrogenH3585
NitrogenN623
OxygenO689
SulphurS20

FormulaC2379H3585N623O689S20
Total Number of Atoms:7296


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):47
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    84270
Absorption 0.1% (=1 g/l)    1.603,   assuming all pairs of CYS residues form cystines

Ext. coefficient    83770
Absorption 0.1% (=1 g/l)    1.593,   assuming all CYS residues are reduced
Aromaticity:0.133

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.01

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.33, 29.03, 21.51]

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:76.9247
Grand average of hydropathicity (GRAVY):-0.24