Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3685
Number of amino acids:19
Molecular Weight:2226.41 Da
Theoretical pI:4.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)15.26%
Cysteine CYS (C)15.26%
Glutamic Acid GLU (E)315.79%
Aspartic Acid ASP (D)00%
Glycine GLY (G)210.53%
Phynylalanine PHE (F)210.53%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)15.26%
Asparagine ASN (N)210.53%
Glutamine GLN (Q)315.79%
Proline PRO (P)00%
Serine SER (S)00%
Arginine ARG (R)210.53%
Threonine THR (T)15.26%
Tryptophan TRP (W)00%
Valine VAL (V)15.26%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC93
HydrogenH144
NitrogenN30
OxygenO32
SulphurS1

FormulaC93H144N30O32S1
Total Number of Atoms:300


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):3
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    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 56.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.05, 21.05, 26.32]

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:41.0526
Grand average of hydropathicity (GRAVY):-1.08