Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5391
Number of amino acids:690
Molecular Weight:76858.56 Da
Theoretical pI:8.56


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)405.8%
Cysteine CYS (C)162.32%
Glutamic Acid GLU (E)304.35%
Aspartic Acid ASP (D)395.65%
Glycine GLY (G)486.96%
Phynylalanine PHE (F)365.22%
Isoleucine ILE (I)446.38%
Histidine HIS (H)162.32%
Lysine LYS (K)334.78%
Methionine MET (M)131.88%
Leucine LEU (L)628.99%
Asparagine ASN (N)415.94%
Glutamine GLN (Q)213.04%
Proline PRO (P)365.22%
Serine SER (S)649.28%
Arginine ARG (R)436.23%
Threonine THR (T)375.36%
Tryptophan TRP (W)71.01%
Valine VAL (V)446.38%
Tyrosine TYR (Y)202.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3413
HydrogenH5353
NitrogenN953
OxygenO1012
SulphurS29

FormulaC3413H5353N953O1012S29
Total Number of Atoms:10760


Total number of positively charged residues (ARG + LYS):76
Total number of negatively charged residues (ASP + GLU):69
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    69300
Absorption 0.1% (=1 g/l)    0.902,   assuming all pairs of CYS residues form cystines

Ext. coefficient    68300
Absorption 0.1% (=1 g/l)    0.889,   assuming all CYS residues are reduced
Aromaticity:0.091

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.82

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.87, 27.39, 21.01]

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:84.2029
Grand average of hydropathicity (GRAVY):-0.23