Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4733
Number of amino acids:435
Molecular Weight:49237 Da
Theoretical pI:6.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)132.99%
Cysteine CYS (C)81.84%
Glutamic Acid GLU (E)214.83%
Aspartic Acid ASP (D)255.75%
Glycine GLY (G)378.51%
Phynylalanine PHE (F)153.45%
Isoleucine ILE (I)306.9%
Histidine HIS (H)71.61%
Lysine LYS (K)265.98%
Methionine MET (M)92.07%
Leucine LEU (L)4410.11%
Asparagine ASN (N)235.29%
Glutamine GLN (Q)122.76%
Proline PRO (P)245.52%
Serine SER (S)398.97%
Arginine ARG (R)163.68%
Threonine THR (T)265.98%
Tryptophan TRP (W)112.53%
Valine VAL (V)214.83%
Tyrosine TYR (Y)286.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2231
HydrogenH3403
NitrogenN569
OxygenO656
SulphurS17

FormulaC2231H3403N569O656S17
Total Number of Atoms:6876


Total number of positively charged residues (ARG + LYS):42
Total number of negatively charged residues (ASP + GLU):46
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    102720
Absorption 0.1% (=1 g/l)    2.086,   assuming all pairs of CYS residues form cystines

Ext. coefficient    102220
Absorption 0.1% (=1 g/l)    2.076,   assuming all CYS residues are reduced
Aromaticity:0.124

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.63

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[34.25, 28.28, 20.00]

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:83.3332
Grand average of hydropathicity (GRAVY):-0.31