Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4536
Number of amino acids:263
Molecular Weight:28558.76 Da
Theoretical pI:9.2


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)259.51%
Cysteine CYS (C)103.8%
Glutamic Acid GLU (E)51.9%
Aspartic Acid ASP (D)124.56%
Glycine GLY (G)238.75%
Phynylalanine PHE (F)103.8%
Isoleucine ILE (I)145.32%
Histidine HIS (H)41.52%
Lysine LYS (K)166.08%
Methionine MET (M)51.9%
Leucine LEU (L)176.46%
Asparagine ASN (N)124.56%
Glutamine GLN (Q)103.8%
Proline PRO (P)93.42%
Serine SER (S)259.51%
Arginine ARG (R)124.56%
Threonine THR (T)134.94%
Tryptophan TRP (W)51.9%
Valine VAL (V)249.13%
Tyrosine TYR (Y)124.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1270
HydrogenH1986
NitrogenN350
OxygenO370
SulphurS15

FormulaC1270H1986N350O370S15
Total Number of Atoms:3991


Total number of positively charged residues (ARG + LYS):28
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    46005
Absorption 0.1% (=1 g/l)    1.611,   assuming all pairs of CYS residues form cystines

Ext. coefficient    45380
Absorption 0.1% (=1 g/l)    1.589,   assuming all CYS residues are reduced
Aromaticity:0.103

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.18, 26.24, 19.77]

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:81.9392
Grand average of hydropathicity (GRAVY):-0.01