Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3585
Number of amino acids:45
Molecular Weight:5904.57 Da
Theoretical pI:9.62


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)48.89%
Glutamic Acid GLU (E)613.33%
Aspartic Acid ASP (D)12.22%
Glycine GLY (G)00%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)24.44%
Lysine LYS (K)48.89%
Methionine MET (M)12.22%
Leucine LEU (L)00%
Asparagine ASN (N)00%
Glutamine GLN (Q)1226.67%
Proline PRO (P)24.44%
Serine SER (S)00%
Arginine ARG (R)920%
Threonine THR (T)24.44%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)24.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC237
HydrogenH390
NitrogenN92
OxygenO76
SulphurS5

FormulaC237H390N92O76S5
Total Number of Atoms:800


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):7
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    3230
Absorption 0.1% (=1 g/l)    0.547,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.505,   assuming all CYS residues are reduced
Aromaticity:0.044

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 73.78

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[4.44, 4.44, 15.56]

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:0
Grand average of hydropathicity (GRAVY):-2.76