Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1067
Number of amino acids:255
Molecular Weight:27218.01 Da
Theoretical pI:8.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)176.67%
Cysteine CYS (C)166.27%
Glutamic Acid GLU (E)41.57%
Aspartic Acid ASP (D)166.27%
Glycine GLY (G)2610.2%
Phynylalanine PHE (F)145.49%
Isoleucine ILE (I)83.14%
Histidine HIS (H)41.57%
Lysine LYS (K)124.71%
Methionine MET (M)31.18%
Leucine LEU (L)249.41%
Asparagine ASN (N)93.53%
Glutamine GLN (Q)31.18%
Proline PRO (P)166.27%
Serine SER (S)259.8%
Arginine ARG (R)114.31%
Threonine THR (T)239.02%
Tryptophan TRP (W)31.18%
Valine VAL (V)135.1%
Tyrosine TYR (Y)83.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1198
HydrogenH1857
NitrogenN323
OxygenO364
SulphurS19

FormulaC1198H1857N323O364S19
Total Number of Atoms:3761


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    29420
Absorption 0.1% (=1 g/l)    1.081,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.044,   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 : 31.82

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.45, 29.80, 18.82]

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:70.3921
Grand average of hydropathicity (GRAVY):-0.04