Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3998
Number of amino acids:960
Molecular Weight:101642.31 Da
Theoretical pI:8.94


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)9610%
Cysteine CYS (C)90.94%
Glutamic Acid GLU (E)565.83%
Aspartic Acid ASP (D)434.48%
Glycine GLY (G)808.33%
Phynylalanine PHE (F)394.06%
Isoleucine ILE (I)272.81%
Histidine HIS (H)161.67%
Lysine LYS (K)515.31%
Methionine MET (M)161.67%
Leucine LEU (L)798.23%
Asparagine ASN (N)282.92%
Glutamine GLN (Q)242.5%
Proline PRO (P)11612.08%
Serine SER (S)949.79%
Arginine ARG (R)586.04%
Threonine THR (T)545.63%
Tryptophan TRP (W)40.42%
Valine VAL (V)606.25%
Tyrosine TYR (Y)101.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC4488
HydrogenH7145
NitrogenN1273
OxygenO1369
SulphurS25

FormulaC4488H7145N1273O1369S25
Total Number of Atoms:14300


Total number of positively charged residues (ARG + LYS):109
Total number of negatively charged residues (ASP + GLU):99
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    37400
Absorption 0.1% (=1 g/l)    0.368,   assuming all pairs of CYS residues form cystines

Ext. coefficient    36900
Absorption 0.1% (=1 g/l)    0.363,   assuming all CYS residues are reduced
Aromaticity:0.055

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 62.55

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.81, 33.12, 25.73]

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:71.1875
Grand average of hydropathicity (GRAVY):-0.39