Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5018
Number of amino acids:401
Molecular Weight:45910.83 Da
Theoretical pI:4.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)307.48%
Cysteine CYS (C)30.75%
Glutamic Acid GLU (E)4511.22%
Aspartic Acid ASP (D)5012.47%
Glycine GLY (G)204.99%
Phynylalanine PHE (F)143.49%
Isoleucine ILE (I)215.24%
Histidine HIS (H)61.5%
Lysine LYS (K)5212.97%
Methionine MET (M)41%
Leucine LEU (L)225.49%
Asparagine ASN (N)71.75%
Glutamine GLN (Q)112.74%
Proline PRO (P)245.99%
Serine SER (S)204.99%
Arginine ARG (R)71.75%
Threonine THR (T)245.99%
Tryptophan TRP (W)122.99%
Valine VAL (V)153.74%
Tyrosine TYR (Y)143.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2050
HydrogenH3124
NitrogenN516
OxygenO668
SulphurS7

FormulaC2050H3124N516O668S7
Total Number of Atoms:6365


Total number of positively charged residues (ARG + LYS):59
Total number of negatively charged residues (ASP + GLU):95
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    86985
Absorption 0.1% (=1 g/l)    1.895,   assuming all pairs of CYS residues form cystines

Ext. coefficient    86860
Absorption 0.1% (=1 g/l)    1.892,   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 : 40.16

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.44, 17.71, 25.19]

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:60.1496
Grand average of hydropathicity (GRAVY):-1.02