Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4039
Number of amino acids:202
Molecular Weight:22563.31 Da
Theoretical pI:9.47


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)136.44%
Cysteine CYS (C)00%
Glutamic Acid GLU (E)125.94%
Aspartic Acid ASP (D)41.98%
Glycine GLY (G)125.94%
Phynylalanine PHE (F)167.92%
Isoleucine ILE (I)104.95%
Histidine HIS (H)52.48%
Lysine LYS (K)73.47%
Methionine MET (M)104.95%
Leucine LEU (L)188.91%
Asparagine ASN (N)31.49%
Glutamine GLN (Q)62.97%
Proline PRO (P)136.44%
Serine SER (S)2110.4%
Arginine ARG (R)136.44%
Threonine THR (T)136.44%
Tryptophan TRP (W)00%
Valine VAL (V)209.9%
Tyrosine TYR (Y)62.97%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1027
HydrogenH1611
NitrogenN267
OxygenO284
SulphurS10

FormulaC1027H1611N267O284S10
Total Number of Atoms:3199


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):16
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    8940
Absorption 0.1% (=1 g/l)    0.396
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 60.47

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.65, 24.26, 26.24]

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:89.2079
Grand average of hydropathicity (GRAVY):0.18