Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5861
Number of amino acids:282
Molecular Weight:31992.15 Da
Theoretical pI:8.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)155.32%
Cysteine CYS (C)62.13%
Glutamic Acid GLU (E)113.9%
Aspartic Acid ASP (D)144.96%
Glycine GLY (G)258.87%
Phynylalanine PHE (F)196.74%
Isoleucine ILE (I)113.9%
Histidine HIS (H)93.19%
Lysine LYS (K)186.38%
Methionine MET (M)51.77%
Leucine LEU (L)207.09%
Asparagine ASN (N)134.61%
Glutamine GLN (Q)124.26%
Proline PRO (P)144.96%
Serine SER (S)217.45%
Arginine ARG (R)124.26%
Threonine THR (T)227.8%
Tryptophan TRP (W)93.19%
Valine VAL (V)144.96%
Tyrosine TYR (Y)124.26%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1450
HydrogenH2164
NitrogenN388
OxygenO413
SulphurS11

FormulaC1450H2164N388O413S11
Total Number of Atoms:4426


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):25
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67755
Absorption 0.1% (=1 g/l)    2.118,   assuming all pairs of CYS residues form cystines

Ext. coefficient    67380
Absorption 0.1% (=1 g/l)    2.106,   assuming all CYS residues are reduced
Aromaticity:0.142

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.14, 25.89, 18.09]

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:62.5887
Grand average of hydropathicity (GRAVY):-0.45