Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4786
Number of amino acids:622
Molecular Weight:68228.83 Da
Theoretical pI:8.77


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)447.07%
Cysteine CYS (C)81.29%
Glutamic Acid GLU (E)294.66%
Aspartic Acid ASP (D)335.31%
Glycine GLY (G)609.65%
Phynylalanine PHE (F)406.43%
Isoleucine ILE (I)233.7%
Histidine HIS (H)142.25%
Lysine LYS (K)457.23%
Methionine MET (M)101.61%
Leucine LEU (L)304.82%
Asparagine ASN (N)497.88%
Glutamine GLN (Q)121.93%
Proline PRO (P)274.34%
Serine SER (S)6510.45%
Arginine ARG (R)254.02%
Threonine THR (T)365.79%
Tryptophan TRP (W)60.96%
Valine VAL (V)386.11%
Tyrosine TYR (Y)284.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3023
HydrogenH4591
NitrogenN837
OxygenO937
SulphurS18

FormulaC3023H4591N837O937S18
Total Number of Atoms:9406


Total number of positively charged residues (ARG + LYS):70
Total number of negatively charged residues (ASP + GLU):62
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75220
Absorption 0.1% (=1 g/l)    1.102,   assuming all pairs of CYS residues form cystines

Ext. coefficient    74720
Absorption 0.1% (=1 g/l)    1.095,   assuming all CYS residues are reduced
Aromaticity:0.119

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.53

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.53, 32.32, 18.17]

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:58.0225
Grand average of hydropathicity (GRAVY):-0.55