Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5266
Number of amino acids:408
Molecular Weight:45013.92 Da
Theoretical pI:8.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)235.64%
Cysteine CYS (C)112.7%
Glutamic Acid GLU (E)143.43%
Aspartic Acid ASP (D)235.64%
Glycine GLY (G)399.56%
Phynylalanine PHE (F)163.92%
Isoleucine ILE (I)297.11%
Histidine HIS (H)204.9%
Lysine LYS (K)184.41%
Methionine MET (M)112.7%
Leucine LEU (L)256.13%
Asparagine ASN (N)225.39%
Glutamine GLN (Q)112.7%
Proline PRO (P)194.66%
Serine SER (S)409.8%
Arginine ARG (R)235.64%
Threonine THR (T)225.39%
Tryptophan TRP (W)92.21%
Valine VAL (V)245.88%
Tyrosine TYR (Y)92.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1977
HydrogenH3065
NitrogenN577
OxygenO587
SulphurS22

FormulaC1977H3065N577O587S22
Total Number of Atoms:6228


Total number of positively charged residues (ARG + LYS):41
Total number of negatively charged residues (ASP + GLU):37
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    63535
Absorption 0.1% (=1 g/l)    1.411,   assuming all pairs of CYS residues form cystines

Ext. coefficient    62910
Absorption 0.1% (=1 g/l)    1.398,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.83

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.45, 29.41, 17.89]

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:74.3137
Grand average of hydropathicity (GRAVY):-0.33