Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4667
Number of amino acids:387
Molecular Weight:42556.27 Da
Theoretical pI:5.49


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3910.08%
Cysteine CYS (C)10.26%
Glutamic Acid GLU (E)215.43%
Aspartic Acid ASP (D)215.43%
Glycine GLY (G)235.94%
Phynylalanine PHE (F)205.17%
Isoleucine ILE (I)184.65%
Histidine HIS (H)61.55%
Lysine LYS (K)246.2%
Methionine MET (M)112.84%
Leucine LEU (L)3910.08%
Asparagine ASN (N)205.17%
Glutamine GLN (Q)164.13%
Proline PRO (P)153.88%
Serine SER (S)287.24%
Arginine ARG (R)112.84%
Threonine THR (T)369.3%
Tryptophan TRP (W)20.52%
Valine VAL (V)215.43%
Tyrosine TYR (Y)153.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1903
HydrogenH2980
NitrogenN494
OxygenO587
SulphurS12

FormulaC1903H2980N494O587S12
Total Number of Atoms:5976


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.784,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33350
Absorption 0.1% (=1 g/l)    0.784,   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 : 38.71

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.72, 22.22, 28.42]

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:83.2557
Grand average of hydropathicity (GRAVY):-0.18