Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4909
Number of amino acids:75
Molecular Weight:8117.69 Da
Theoretical pI:8.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)79.33%
Cysteine CYS (C)810.67%
Glutamic Acid GLU (E)34%
Aspartic Acid ASP (D)34%
Glycine GLY (G)79.33%
Phynylalanine PHE (F)79.33%
Isoleucine ILE (I)34%
Histidine HIS (H)00%
Lysine LYS (K)45.33%
Methionine MET (M)56.67%
Leucine LEU (L)79.33%
Asparagine ASN (N)22.67%
Glutamine GLN (Q)11.33%
Proline PRO (P)11.33%
Serine SER (S)56.67%
Arginine ARG (R)45.33%
Threonine THR (T)45.33%
Tryptophan TRP (W)00%
Valine VAL (V)45.33%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC351
HydrogenH564
NitrogenN94
OxygenO100
SulphurS13

FormulaC351H564N94O100S13
Total Number of Atoms:1122


Total number of positively charged residues (ARG + LYS):8
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    500
Absorption 0.1% (=1 g/l)    0.062,   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:0.093

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.09

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.00, 20.00, 29.33]

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:76.8
Grand average of hydropathicity (GRAVY):0.56