Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4074
Number of amino acids:656
Molecular Weight:73695.43 Da
Theoretical pI:8.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)243.66%
Cysteine CYS (C)192.9%
Glutamic Acid GLU (E)243.66%
Aspartic Acid ASP (D)436.55%
Glycine GLY (G)477.16%
Phynylalanine PHE (F)335.03%
Isoleucine ILE (I)446.71%
Histidine HIS (H)81.22%
Lysine LYS (K)324.88%
Methionine MET (M)182.74%
Leucine LEU (L)609.15%
Asparagine ASN (N)365.49%
Glutamine GLN (Q)243.66%
Proline PRO (P)324.88%
Serine SER (S)578.69%
Arginine ARG (R)416.25%
Threonine THR (T)406.1%
Tryptophan TRP (W)60.91%
Valine VAL (V)446.71%
Tyrosine TYR (Y)243.66%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3269
HydrogenH5145
NitrogenN893
OxygenO972
SulphurS37

FormulaC3269H5145N893O972S37
Total Number of Atoms:10316


Total number of positively charged residues (ARG + LYS):73
Total number of negatively charged residues (ASP + GLU):67
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    69885
Absorption 0.1% (=1 g/l)    0.948,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68760
Absorption 0.1% (=1 g/l)    0.933,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.45

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.16, 26.22, 19.21]

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:84.939
Grand average of hydropathicity (GRAVY):-0.20