Physicochemical Properties of Peptide



PPepDB ID:PPepDB_652
Number of amino acids:91
Molecular Weight:9283.18 Da
Theoretical pI:6.72


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)77.69%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)66.59%
Aspartic Acid ASP (D)22.2%
Glycine GLY (G)2123.08%
Phynylalanine PHE (F)22.2%
Isoleucine ILE (I)11.1%
Histidine HIS (H)77.69%
Lysine LYS (K)55.49%
Methionine MET (M)00%
Leucine LEU (L)77.69%
Asparagine ASN (N)11.1%
Glutamine GLN (Q)44.4%
Proline PRO (P)44.4%
Serine SER (S)66.59%
Arginine ARG (R)22.2%
Threonine THR (T)44.4%
Tryptophan TRP (W)00%
Valine VAL (V)77.69%
Tyrosine TYR (Y)55.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC409
HydrogenH623
NitrogenN121
OxygenO128
SulphurS0

FormulaC409H623N121O128S0
Total Number of Atoms:1281


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):8
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    7450
Absorption 0.1% (=1 g/l)    0.803
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 7.24

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.18, 35.16, 21.98]

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:64.2857
Grand average of hydropathicity (GRAVY):-0.51