Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4998
Number of amino acids:626
Molecular Weight:71345.21 Da
Theoretical pI:6.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)335.27%
Cysteine CYS (C)71.12%
Glutamic Acid GLU (E)6810.86%
Aspartic Acid ASP (D)304.79%
Glycine GLY (G)457.19%
Phynylalanine PHE (F)223.51%
Isoleucine ILE (I)253.99%
Histidine HIS (H)152.4%
Lysine LYS (K)365.75%
Methionine MET (M)81.28%
Leucine LEU (L)436.87%
Asparagine ASN (N)416.55%
Glutamine GLN (Q)436.87%
Proline PRO (P)386.07%
Serine SER (S)457.19%
Arginine ARG (R)599.42%
Threonine THR (T)213.35%
Tryptophan TRP (W)50.8%
Valine VAL (V)335.27%
Tyrosine TYR (Y)91.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3065
HydrogenH4882
NitrogenN958
OxygenO982
SulphurS15

FormulaC3065H4882N958O982S15
Total Number of Atoms:9902


Total number of positively charged residues (ARG + LYS):95
Total number of negatively charged residues (ASP + GLU):98
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    41285
Absorption 0.1% (=1 g/l)    0.579,   assuming all pairs of CYS residues form cystines

Ext. coefficient    40910
Absorption 0.1% (=1 g/l)    0.573,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 63.10

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.89, 27.00, 24.28]

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:62.9233
Grand average of hydropathicity (GRAVY):-1.07