Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2836
Number of amino acids:27
Molecular Weight:2993.45 Da
Theoretical pI:10.43


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)27.41%
Glycine GLY (G)414.81%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.7%
Histidine HIS (H)00%
Lysine LYS (K)311.11%
Methionine MET (M)27.41%
Leucine LEU (L)13.7%
Asparagine ASN (N)27.41%
Glutamine GLN (Q)13.7%
Proline PRO (P)13.7%
Serine SER (S)311.11%
Arginine ARG (R)311.11%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)311.11%
Tyrosine TYR (Y)13.7%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC125
HydrogenH214
NitrogenN42
OxygenO39
SulphurS2

FormulaC125H214N42O39S2
Total Number of Atoms:422


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):2
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    1490
Absorption 0.1% (=1 g/l)    0.498
Aromaticity:0.037

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.83

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.22, 37.04, 11.11]

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:61.111
Grand average of hydropathicity (GRAVY):-0.92