Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4245
Number of amino acids:247
Molecular Weight:27002.73 Da
Theoretical pI:5.44


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.48%
Cysteine CYS (C)10.4%
Glutamic Acid GLU (E)104.05%
Aspartic Acid ASP (D)52.02%
Glycine GLY (G)239.31%
Phynylalanine PHE (F)166.48%
Isoleucine ILE (I)249.72%
Histidine HIS (H)52.02%
Lysine LYS (K)72.83%
Methionine MET (M)41.62%
Leucine LEU (L)3313.36%
Asparagine ASN (N)93.64%
Glutamine GLN (Q)104.05%
Proline PRO (P)145.67%
Serine SER (S)145.67%
Arginine ARG (R)31.21%
Threonine THR (T)166.48%
Tryptophan TRP (W)52.02%
Valine VAL (V)239.31%
Tyrosine TYR (Y)93.64%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1276
HydrogenH1965
NitrogenN297
OxygenO336
SulphurS5

FormulaC1276H1965N297O336S5
Total Number of Atoms:3879


Total number of positively charged residues (ARG + LYS):10
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.515,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    1.515,   assuming all CYS residues are reduced
Aromaticity:0.121

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.76

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[44.53, 24.29, 25.51]

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:123.482
Grand average of hydropathicity (GRAVY):0.68