Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4722
Number of amino acids:492
Molecular Weight:53591.44 Da
Theoretical pI:5.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6012.2%
Cysteine CYS (C)91.83%
Glutamic Acid GLU (E)214.27%
Aspartic Acid ASP (D)306.1%
Glycine GLY (G)408.13%
Phynylalanine PHE (F)183.66%
Isoleucine ILE (I)193.86%
Histidine HIS (H)132.64%
Lysine LYS (K)255.08%
Methionine MET (M)112.24%
Leucine LEU (L)469.35%
Asparagine ASN (N)244.88%
Glutamine GLN (Q)183.66%
Proline PRO (P)275.49%
Serine SER (S)346.91%
Arginine ARG (R)142.85%
Threonine THR (T)255.08%
Tryptophan TRP (W)102.03%
Valine VAL (V)244.88%
Tyrosine TYR (Y)244.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2400
HydrogenH3653
NitrogenN637
OxygenO720
SulphurS20

FormulaC2400H3653N637O720S20
Total Number of Atoms:7430


Total number of positively charged residues (ARG + LYS):39
Total number of negatively charged residues (ASP + GLU):51
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    91260
Absorption 0.1% (=1 g/l)    1.703,   assuming all pairs of CYS residues form cystines

Ext. coefficient    90760
Absorption 0.1% (=1 g/l)    1.694,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.66, 25.41, 28.05]

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:77.8658
Grand average of hydropathicity (GRAVY):-0.22