Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2679
Number of amino acids:47
Molecular Weight:5428.14 Da
Theoretical pI:9.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)12.13%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)510.64%
Aspartic Acid ASP (D)24.26%
Glycine GLY (G)24.26%
Phynylalanine PHE (F)24.26%
Isoleucine ILE (I)12.13%
Histidine HIS (H)00%
Lysine LYS (K)714.89%
Methionine MET (M)24.26%
Leucine LEU (L)24.26%
Asparagine ASN (N)24.26%
Glutamine GLN (Q)36.38%
Proline PRO (P)48.51%
Serine SER (S)612.77%
Arginine ARG (R)36.38%
Threonine THR (T)24.26%
Tryptophan TRP (W)00%
Valine VAL (V)24.26%
Tyrosine TYR (Y)12.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC234
HydrogenH382
NitrogenN68
OxygenO76
SulphurS2

FormulaC234H382N68O76S2
Total Number of Atoms:762


Total number of positively charged residues (ARG + LYS):10
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    1490
Absorption 0.1% (=1 g/l)    0.274
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 84.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.02, 29.79, 21.28]

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:39.3617
Grand average of hydropathicity (GRAVY):-1.40