Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4478
Number of amino acids:510
Molecular Weight:56327.77 Da
Theoretical pI:9.15


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)356.86%
Cysteine CYS (C)101.96%
Glutamic Acid GLU (E)203.92%
Aspartic Acid ASP (D)203.92%
Glycine GLY (G)367.06%
Phynylalanine PHE (F)203.92%
Isoleucine ILE (I)265.1%
Histidine HIS (H)50.98%
Lysine LYS (K)285.49%
Methionine MET (M)40.78%
Leucine LEU (L)428.24%
Asparagine ASN (N)336.47%
Glutamine GLN (Q)214.12%
Proline PRO (P)234.51%
Serine SER (S)448.63%
Arginine ARG (R)254.9%
Threonine THR (T)509.8%
Tryptophan TRP (W)91.76%
Valine VAL (V)377.25%
Tyrosine TYR (Y)224.31%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2509
HydrogenH3928
NitrogenN686
OxygenO761
SulphurS14

FormulaC2509H3928N686O761S14
Total Number of Atoms:7898


Total number of positively charged residues (ARG + LYS):53
Total number of negatively charged residues (ASP + GLU):40
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    82905
Absorption 0.1% (=1 g/l)    1.472,   assuming all pairs of CYS residues form cystines

Ext. coefficient    82280
Absorption 0.1% (=1 g/l)    1.461,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.38

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.59, 26.67, 19.80]

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:79.9019
Grand average of hydropathicity (GRAVY):-0.28