Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4340
Number of amino acids:217
Molecular Weight:23638.33 Da
Theoretical pI:6.21


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)83.69%
Cysteine CYS (C)52.3%
Glutamic Acid GLU (E)146.45%
Aspartic Acid ASP (D)94.15%
Glycine GLY (G)2411.06%
Phynylalanine PHE (F)156.91%
Isoleucine ILE (I)167.37%
Histidine HIS (H)20.92%
Lysine LYS (K)146.45%
Methionine MET (M)10.46%
Leucine LEU (L)209.22%
Asparagine ASN (N)94.15%
Glutamine GLN (Q)62.76%
Proline PRO (P)167.37%
Serine SER (S)125.53%
Arginine ARG (R)83.69%
Threonine THR (T)125.53%
Tryptophan TRP (W)10.46%
Valine VAL (V)209.22%
Tyrosine TYR (Y)52.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1079
HydrogenH1693
NitrogenN275
OxygenO308
SulphurS6

FormulaC1079H1693N275O308S6
Total Number of Atoms:3361


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13200
Absorption 0.1% (=1 g/l)    0.558,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.548,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.49

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.48, 28.11, 19.82]

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:95.1152
Grand average of hydropathicity (GRAVY):0.06