Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5913
Number of amino acids:230
Molecular Weight:25981.09 Da
Theoretical pI:9.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)41.74%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)198.26%
Aspartic Acid ASP (D)20.87%
Glycine GLY (G)10.43%
Phynylalanine PHE (F)10.43%
Isoleucine ILE (I)31.3%
Histidine HIS (H)10.43%
Lysine LYS (K)3816.52%
Methionine MET (M)10.43%
Leucine LEU (L)83.48%
Asparagine ASN (N)31.3%
Glutamine GLN (Q)10.43%
Proline PRO (P)8235.65%
Serine SER (S)41.74%
Arginine ARG (R)00%
Threonine THR (T)31.3%
Tryptophan TRP (W)00%
Valine VAL (V)3615.65%
Tyrosine TYR (Y)2310%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1269
HydrogenH1942
NitrogenN274
OxygenO307
SulphurS1

FormulaC1269H1942N274O307S1
Total Number of Atoms:3793


Total number of positively charged residues (ARG + LYS):38
Total number of negatively charged residues (ASP + GLU):21
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    34270
Absorption 0.1% (=1 g/l)    1.319
Aromaticity:0.104

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 59.60

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.87, 39.13, 13.91]

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:65.7827
Grand average of hydropathicity (GRAVY):-0.86