Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4355
Number of amino acids:386
Molecular Weight:42338.08 Da
Theoretical pI:5.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)389.84%
Cysteine CYS (C)10.26%
Glutamic Acid GLU (E)215.44%
Aspartic Acid ASP (D)235.96%
Glycine GLY (G)225.7%
Phynylalanine PHE (F)205.18%
Isoleucine ILE (I)205.18%
Histidine HIS (H)30.78%
Lysine LYS (K)276.99%
Methionine MET (M)112.85%
Leucine LEU (L)3910.1%
Asparagine ASN (N)174.4%
Glutamine GLN (Q)143.63%
Proline PRO (P)143.63%
Serine SER (S)307.77%
Arginine ARG (R)82.07%
Threonine THR (T)4110.62%
Tryptophan TRP (W)20.52%
Valine VAL (V)194.92%
Tyrosine TYR (Y)164.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1898
HydrogenH2978
NitrogenN476
OxygenO593
SulphurS12

FormulaC1898H2978N476O593S12
Total Number of Atoms:5957


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.823,   assuming all pairs of CYS residues form cystines

Ext. coefficient    34840
Absorption 0.1% (=1 g/l)    0.823,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.12

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.05, 21.50, 28.24]

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:83.7305
Grand average of hydropathicity (GRAVY):-0.14