Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2445
Number of amino acids:32
Molecular Weight:3600.25 Da
Theoretical pI:4.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.13%
Cysteine CYS (C)618.75%
Glutamic Acid GLU (E)26.25%
Aspartic Acid ASP (D)00%
Glycine GLY (G)39.38%
Phynylalanine PHE (F)412.5%
Isoleucine ILE (I)39.38%
Histidine HIS (H)00%
Lysine LYS (K)13.13%
Methionine MET (M)13.13%
Leucine LEU (L)13.13%
Asparagine ASN (N)13.13%
Glutamine GLN (Q)13.13%
Proline PRO (P)26.25%
Serine SER (S)26.25%
Arginine ARG (R)00%
Threonine THR (T)26.25%
Tryptophan TRP (W)13.13%
Valine VAL (V)00%
Tyrosine TYR (Y)13.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC161
HydrogenH232
NitrogenN36
OxygenO44
SulphurS7

FormulaC161H232N36O44S7
Total Number of Atoms:480


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):2
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7365
Absorption 0.1% (=1 g/l)    2.046,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    1.942,   assuming all CYS residues are reduced
Aromaticity:0.188

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.92

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.25, 25.00, 15.62]

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:51.875
Grand average of hydropathicity (GRAVY):0.62