Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1151
Number of amino acids:255
Molecular Weight:26754.25 Da
Theoretical pI:5.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2911.37%
Cysteine CYS (C)197.45%
Glutamic Acid GLU (E)62.35%
Aspartic Acid ASP (D)145.49%
Glycine GLY (G)2911.37%
Phynylalanine PHE (F)103.92%
Isoleucine ILE (I)72.75%
Histidine HIS (H)31.18%
Lysine LYS (K)62.35%
Methionine MET (M)41.57%
Leucine LEU (L)176.67%
Asparagine ASN (N)62.35%
Glutamine GLN (Q)62.35%
Proline PRO (P)176.67%
Serine SER (S)218.24%
Arginine ARG (R)124.71%
Threonine THR (T)218.24%
Tryptophan TRP (W)51.96%
Valine VAL (V)135.1%
Tyrosine TYR (Y)103.92%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1164
HydrogenH1780
NitrogenN320
OxygenO360
SulphurS23

FormulaC1164H1780N320O360S23
Total Number of Atoms:3647


Total number of positively charged residues (ARG + LYS):18
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    43525
Absorption 0.1% (=1 g/l)    1.627,   assuming all pairs of CYS residues form cystines

Ext. coefficient    42400
Absorption 0.1% (=1 g/l)    1.585,   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 : 47.49

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.31, 28.63, 21.96]

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:62.8627
Grand average of hydropathicity (GRAVY):-0.00