Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5354
Number of amino acids:292
Molecular Weight:32923.59 Da
Theoretical pI:9.48


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)248.22%
Cysteine CYS (C)41.37%
Glutamic Acid GLU (E)113.77%
Aspartic Acid ASP (D)113.77%
Glycine GLY (G)237.88%
Phynylalanine PHE (F)196.51%
Isoleucine ILE (I)124.11%
Histidine HIS (H)62.05%
Lysine LYS (K)206.85%
Methionine MET (M)93.08%
Leucine LEU (L)196.51%
Asparagine ASN (N)175.82%
Glutamine GLN (Q)124.11%
Proline PRO (P)124.11%
Serine SER (S)206.85%
Arginine ARG (R)134.45%
Threonine THR (T)227.53%
Tryptophan TRP (W)103.42%
Valine VAL (V)186.16%
Tyrosine TYR (Y)103.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1491
HydrogenH2262
NitrogenN402
OxygenO418
SulphurS13

FormulaC1491H2262N402O418S13
Total Number of Atoms:4586


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):22
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    70150
Absorption 0.1% (=1 g/l)    2.131,   assuming all pairs of CYS residues form cystines

Ext. coefficient    69900
Absorption 0.1% (=1 g/l)    2.123,   assuming all CYS residues are reduced
Aromaticity:0.134

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.98

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.14, 24.66, 21.58]

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:67.5
Grand average of hydropathicity (GRAVY):-0.31