Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4363
Number of amino acids:326
Molecular Weight:35364.77 Da
Theoretical pI:5.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)309.2%
Cysteine CYS (C)82.45%
Glutamic Acid GLU (E)175.21%
Aspartic Acid ASP (D)195.83%
Glycine GLY (G)267.98%
Phynylalanine PHE (F)216.44%
Isoleucine ILE (I)195.83%
Histidine HIS (H)41.23%
Lysine LYS (K)175.21%
Methionine MET (M)82.45%
Leucine LEU (L)319.51%
Asparagine ASN (N)164.91%
Glutamine GLN (Q)92.76%
Proline PRO (P)164.91%
Serine SER (S)216.44%
Arginine ARG (R)154.6%
Threonine THR (T)154.6%
Tryptophan TRP (W)10.31%
Valine VAL (V)288.59%
Tyrosine TYR (Y)51.53%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1580
HydrogenH2504
NitrogenN422
OxygenO465
SulphurS16

FormulaC1580H2504N422O465S16
Total Number of Atoms:4987


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13450
Absorption 0.1% (=1 g/l)    0.380,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.366,   assuming all CYS residues are reduced
Aromaticity:0.083

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.90

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.21, 24.23, 26.38]

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:93.9264
Grand average of hydropathicity (GRAVY):0.12