Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4699
Number of amino acids:849
Molecular Weight:90280.92 Da
Theoretical pI:9.22


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)10912.84%
Cysteine CYS (C)60.71%
Glutamic Acid GLU (E)505.89%
Aspartic Acid ASP (D)435.06%
Glycine GLY (G)637.42%
Phynylalanine PHE (F)293.42%
Isoleucine ILE (I)172%
Histidine HIS (H)141.65%
Lysine LYS (K)435.06%
Methionine MET (M)202.36%
Leucine LEU (L)789.19%
Asparagine ASN (N)263.06%
Glutamine GLN (Q)202.36%
Proline PRO (P)9210.84%
Serine SER (S)637.42%
Arginine ARG (R)627.3%
Threonine THR (T)475.54%
Tryptophan TRP (W)40.47%
Valine VAL (V)566.6%
Tyrosine TYR (Y)70.82%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3966
HydrogenH6386
NitrogenN1156
OxygenO1199
SulphurS26

FormulaC3966H6386N1156O1199S26
Total Number of Atoms:12733


Total number of positively charged residues (ARG + LYS):105
Total number of negatively charged residues (ASP + GLU):93
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    32805
Absorption 0.1% (=1 g/l)    0.363,   assuming all pairs of CYS residues form cystines

Ext. coefficient    32430
Absorption 0.1% (=1 g/l)    0.359,   assuming all CYS residues are reduced
Aromaticity:0.047

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 52.61

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.50, 28.74, 30.27]

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:75.6066
Grand average of hydropathicity (GRAVY):-0.36