Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4843
Number of amino acids:506
Molecular Weight:55603.88 Da
Theoretical pI:7.97


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)397.71%
Cysteine CYS (C)101.98%
Glutamic Acid GLU (E)142.77%
Aspartic Acid ASP (D)265.14%
Glycine GLY (G)305.93%
Phynylalanine PHE (F)254.94%
Isoleucine ILE (I)265.14%
Histidine HIS (H)50.99%
Lysine LYS (K)265.14%
Methionine MET (M)101.98%
Leucine LEU (L)469.09%
Asparagine ASN (N)367.11%
Glutamine GLN (Q)193.75%
Proline PRO (P)254.94%
Serine SER (S)5911.66%
Arginine ARG (R)163.16%
Threonine THR (T)336.52%
Tryptophan TRP (W)61.19%
Valine VAL (V)305.93%
Tyrosine TYR (Y)254.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2484
HydrogenH3835
NitrogenN651
OxygenO759
SulphurS20

FormulaC2484H3835N651O759S20
Total Number of Atoms:7749


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    70875
Absorption 0.1% (=1 g/l)    1.275,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70250
Absorption 0.1% (=1 g/l)    1.263,   assuming all CYS residues are reduced
Aromaticity:0.111

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.01

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.23, 29.64, 21.54]

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:80.3953
Grand average of hydropathicity (GRAVY):-0.16