Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4203
Number of amino acids:469
Molecular Weight:50582.81 Da
Theoretical pI:5.84


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)306.4%
Cysteine CYS (C)81.71%
Glutamic Acid GLU (E)234.9%
Aspartic Acid ASP (D)316.61%
Glycine GLY (G)449.38%
Phynylalanine PHE (F)234.9%
Isoleucine ILE (I)173.62%
Histidine HIS (H)398.32%
Lysine LYS (K)214.48%
Methionine MET (M)91.92%
Leucine LEU (L)6012.79%
Asparagine ASN (N)153.2%
Glutamine GLN (Q)91.92%
Proline PRO (P)112.35%
Serine SER (S)6012.79%
Arginine ARG (R)91.92%
Threonine THR (T)194.05%
Tryptophan TRP (W)51.07%
Valine VAL (V)326.82%
Tyrosine TYR (Y)40.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2236
HydrogenH3454
NitrogenN624
OxygenO685
SulphurS17

FormulaC2236H3454N624O685S17
Total Number of Atoms:7016


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33960
Absorption 0.1% (=1 g/l)    0.671,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33460
Absorption 0.1% (=1 g/l)    0.661,   assuming all CYS residues are reduced
Aromaticity:0.068

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.28

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.06, 27.72, 26.01]

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:90.2133
Grand average of hydropathicity (GRAVY):-0.07