Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4618
Number of amino acids:467
Molecular Weight:50775.81 Da
Theoretical pI:5.41


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)286%
Cysteine CYS (C)163.43%
Glutamic Acid GLU (E)255.35%
Aspartic Acid ASP (D)316.64%
Glycine GLY (G)439.21%
Phynylalanine PHE (F)163.43%
Isoleucine ILE (I)337.07%
Histidine HIS (H)132.78%
Lysine LYS (K)286%
Methionine MET (M)61.28%
Leucine LEU (L)234.93%
Asparagine ASN (N)326.85%
Glutamine GLN (Q)194.07%
Proline PRO (P)163.43%
Serine SER (S)408.57%
Arginine ARG (R)143%
Threonine THR (T)255.35%
Tryptophan TRP (W)51.07%
Valine VAL (V)408.57%
Tyrosine TYR (Y)143%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2211
HydrogenH3457
NitrogenN619
OxygenO710
SulphurS22

FormulaC2211H3457N619O710S22
Total Number of Atoms:7019


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):56
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49360
Absorption 0.1% (=1 g/l)    0.972,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48360
Absorption 0.1% (=1 g/l)    0.952,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 34.56

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.05, 28.05, 17.56]

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:77.6017
Grand average of hydropathicity (GRAVY):-0.33