Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1460
Number of amino acids:30
Molecular Weight:3727.04 Da
Theoretical pI:6.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.33%
Cysteine CYS (C)13.33%
Glutamic Acid GLU (E)310%
Aspartic Acid ASP (D)310%
Glycine GLY (G)13.33%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)13.33%
Methionine MET (M)00%
Leucine LEU (L)310%
Asparagine ASN (N)00%
Glutamine GLN (Q)723.33%
Proline PRO (P)00%
Serine SER (S)26.67%
Arginine ARG (R)516.67%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)13.33%
Tyrosine TYR (Y)26.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC153
HydrogenH249
NitrogenN53
OxygenO54
SulphurS1

FormulaC153H249N53O54S1
Total Number of Atoms:510


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):6
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    2980
Absorption 0.1% (=1 g/l)    0.800,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.800,   assuming all CYS residues are reduced
Aromaticity:0.067

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 73.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.00, 10.00, 23.33]

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:52
Grand average of hydropathicity (GRAVY):-1.89