Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1063
Number of amino acids:255
Molecular Weight:27598.6 Da
Theoretical pI:8.03


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.27%
Cysteine CYS (C)197.45%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)155.88%
Glycine GLY (G)239.02%
Phynylalanine PHE (F)124.71%
Isoleucine ILE (I)135.1%
Histidine HIS (H)20.78%
Lysine LYS (K)166.27%
Methionine MET (M)41.57%
Leucine LEU (L)197.45%
Asparagine ASN (N)145.49%
Glutamine GLN (Q)51.96%
Proline PRO (P)166.27%
Serine SER (S)218.24%
Arginine ARG (R)83.14%
Threonine THR (T)197.45%
Tryptophan TRP (W)31.18%
Valine VAL (V)135.1%
Tyrosine TYR (Y)114.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1214
HydrogenH1881
NitrogenN321
OxygenO368
SulphurS23

FormulaC1214H1881N321O368S23
Total Number of Atoms:3807


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):21
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34015
Absorption 0.1% (=1 g/l)    1.232,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32890
Absorption 0.1% (=1 g/l)    1.192,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.13

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.84, 29.02, 17.65]

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:70
Grand average of hydropathicity (GRAVY):-0.09