Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1343
Number of amino acids:255
Molecular Weight:26236.36 Da
Theoretical pI:5.27


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2911.37%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)51.96%
Aspartic Acid ASP (D)124.71%
Glycine GLY (G)3011.76%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)20.78%
Histidine HIS (H)20.78%
Lysine LYS (K)41.57%
Methionine MET (M)51.96%
Leucine LEU (L)166.27%
Asparagine ASN (N)83.14%
Glutamine GLN (Q)51.96%
Proline PRO (P)176.67%
Serine SER (S)2710.59%
Arginine ARG (R)103.92%
Threonine THR (T)2610.2%
Tryptophan TRP (W)31.18%
Valine VAL (V)166.27%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1135
HydrogenH1733
NitrogenN309
OxygenO366
SulphurS21

FormulaC1135H1733N309O366S21
Total Number of Atoms:3564


Total number of positively charged residues (ARG + LYS):14
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    32400
Absorption 0.1% (=1 g/l)    1.235,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.197,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.04

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.14, 32.16, 21.57]

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:57.098
Grand average of hydropathicity (GRAVY):0.02