Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4723
Number of amino acids:491
Molecular Weight:53421.48 Da
Theoretical pI:8.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6012.22%
Cysteine CYS (C)71.43%
Glutamic Acid GLU (E)163.26%
Aspartic Acid ASP (D)234.68%
Glycine GLY (G)418.35%
Phynylalanine PHE (F)173.46%
Isoleucine ILE (I)183.67%
Histidine HIS (H)112.24%
Lysine LYS (K)306.11%
Methionine MET (M)142.85%
Leucine LEU (L)408.15%
Asparagine ASN (N)285.7%
Glutamine GLN (Q)234.68%
Proline PRO (P)244.89%
Serine SER (S)387.74%
Arginine ARG (R)153.05%
Threonine THR (T)265.3%
Tryptophan TRP (W)102.04%
Valine VAL (V)265.3%
Tyrosine TYR (Y)244.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2383
HydrogenH3663
NitrogenN649
OxygenO709
SulphurS21

FormulaC2383H3663N649O709S21
Total Number of Atoms:7425


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    91135
Absorption 0.1% (=1 g/l)    1.706,   assuming all pairs of CYS residues form cystines

Ext. coefficient    90760
Absorption 0.1% (=1 g/l)    1.699,   assuming all CYS residues are reduced
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.99

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.49, 26.68, 26.48]

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:73.6457
Grand average of hydropathicity (GRAVY):-0.28