Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5313
Number of amino acids:439
Molecular Weight:50552 Da
Theoretical pI:5.89


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)235.24%
Cysteine CYS (C)10.23%
Glutamic Acid GLU (E)378.43%
Aspartic Acid ASP (D)214.78%
Glycine GLY (G)194.33%
Phynylalanine PHE (F)306.83%
Isoleucine ILE (I)265.92%
Histidine HIS (H)81.82%
Lysine LYS (K)214.78%
Methionine MET (M)20.46%
Leucine LEU (L)4710.71%
Asparagine ASN (N)337.52%
Glutamine GLN (Q)337.52%
Proline PRO (P)225.01%
Serine SER (S)337.52%
Arginine ARG (R)317.06%
Threonine THR (T)112.51%
Tryptophan TRP (W)00%
Valine VAL (V)296.61%
Tyrosine TYR (Y)122.73%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2260
HydrogenH3541
NitrogenN635
OxygenO678
SulphurS3

FormulaC2260H3541N635O678S3
Total Number of Atoms:7117


Total number of positively charged residues (ARG + LYS):52
Total number of negatively charged residues (ASP + GLU):58
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17880
Absorption 0.1% (=1 g/l)    0.354,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17880
Absorption 0.1% (=1 g/l)    0.354,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.76

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.80, 24.37, 24.83]

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:89.2485
Grand average of hydropathicity (GRAVY):-0.51