Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2660
Number of amino acids:43
Molecular Weight:4722.3 Da
Theoretical pI:4.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)49.3%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)36.98%
Aspartic Acid ASP (D)24.65%
Glycine GLY (G)49.3%
Phynylalanine PHE (F)49.3%
Isoleucine ILE (I)12.33%
Histidine HIS (H)12.33%
Lysine LYS (K)00%
Methionine MET (M)12.33%
Leucine LEU (L)613.95%
Asparagine ASN (N)00%
Glutamine GLN (Q)36.98%
Proline PRO (P)24.65%
Serine SER (S)36.98%
Arginine ARG (R)12.33%
Threonine THR (T)49.3%
Tryptophan TRP (W)00%
Valine VAL (V)24.65%
Tyrosine TYR (Y)24.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC216
HydrogenH323
NitrogenN51
OxygenO66
SulphurS1

FormulaC216H323N51O66S1
Total Number of Atoms:657


Total number of positively charged residues (ARG + LYS):1
Total number of negatively charged residues (ASP + GLU):5
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)    0.631
Aromaticity:0.140

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.64

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.88, 20.93, 32.56]

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:86.2791
Grand average of hydropathicity (GRAVY):0.18