Physicochemical Properties of Peptide



PPepDB ID:PPepDB_697
Number of amino acids:14
Molecular Weight:1681.64 Da
Theoretical pI:3.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)214.29%
Aspartic Acid ASP (D)321.43%
Glycine GLY (G)00%
Phynylalanine PHE (F)214.29%
Isoleucine ILE (I)00%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)17.14%
Asparagine ASN (N)214.29%
Glutamine GLN (Q)00%
Proline PRO (P)00%
Serine SER (S)321.43%
Arginine ARG (R)00%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)17.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC72
HydrogenH96
NitrogenN16
OxygenO31
SulphurS0

FormulaC72H96N16O31S0
Total Number of Atoms:215


Total number of positively charged residues (ARG + LYS):0
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    1490
Absorption 0.1% (=1 g/l)    0.886
Aromaticity:0.214

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.35

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.57, 35.71, 21.43]

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:27.8572
Grand average of hydropathicity (GRAVY):-1.34