Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5050
Number of amino acids:733
Molecular Weight:82205.92 Da
Theoretical pI:5.11


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)253.41%
Cysteine CYS (C)283.82%
Glutamic Acid GLU (E)496.68%
Aspartic Acid ASP (D)405.46%
Glycine GLY (G)557.5%
Phynylalanine PHE (F)334.5%
Isoleucine ILE (I)446%
Histidine HIS (H)172.32%
Lysine LYS (K)283.82%
Methionine MET (M)172.32%
Leucine LEU (L)719.69%
Asparagine ASN (N)435.87%
Glutamine GLN (Q)375.05%
Proline PRO (P)273.68%
Serine SER (S)598.05%
Arginine ARG (R)344.64%
Threonine THR (T)527.09%
Tryptophan TRP (W)60.82%
Valine VAL (V)435.87%
Tyrosine TYR (Y)253.41%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3603
HydrogenH5627
NitrogenN983
OxygenO1128
SulphurS45

FormulaC3603H5627N983O1128S45
Total Number of Atoms:11386


Total number of positively charged residues (ARG + LYS):62
Total number of negatively charged residues (ASP + GLU):89
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    72000
Absorption 0.1% (=1 g/l)    0.876,   assuming all pairs of CYS residues form cystines

Ext. coefficient    70250
Absorption 0.1% (=1 g/l)    0.855,   assuming all CYS residues are reduced
Aromaticity:0.087

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.29, 25.10, 22.10]

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:81.6098
Grand average of hydropathicity (GRAVY):-0.28