Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3260
Number of amino acids:17
Molecular Weight:1787.95 Da
Theoretical pI:6.07


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)15.88%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)15.88%
Aspartic Acid ASP (D)15.88%
Glycine GLY (G)211.76%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)211.76%
Histidine HIS (H)00%
Lysine LYS (K)15.88%
Methionine MET (M)00%
Leucine LEU (L)00%
Asparagine ASN (N)15.88%
Glutamine GLN (Q)00%
Proline PRO (P)317.65%
Serine SER (S)317.65%
Arginine ARG (R)15.88%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)15.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC77
HydrogenH122
NitrogenN22
OxygenO27
SulphurS0

FormulaC77H122N22O27S0
Total Number of Atoms:248


Total number of positively charged residues (ARG + LYS):2
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)    0.833
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 68.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.65, 52.94, 11.76]

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:51.7647
Grand average of hydropathicity (GRAVY):-1.02