Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4518
Number of amino acids:347
Molecular Weight:38111.88 Da
Theoretical pI:8.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)318.93%
Cysteine CYS (C)10.29%
Glutamic Acid GLU (E)144.03%
Aspartic Acid ASP (D)154.32%
Glycine GLY (G)257.2%
Phynylalanine PHE (F)174.9%
Isoleucine ILE (I)164.61%
Histidine HIS (H)20.58%
Lysine LYS (K)164.61%
Methionine MET (M)51.44%
Leucine LEU (L)308.65%
Asparagine ASN (N)329.22%
Glutamine GLN (Q)133.75%
Proline PRO (P)195.48%
Serine SER (S)329.22%
Arginine ARG (R)164.61%
Threonine THR (T)164.61%
Tryptophan TRP (W)30.86%
Valine VAL (V)267.49%
Tyrosine TYR (Y)185.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1707
HydrogenH2639
NitrogenN463
OxygenO517
SulphurS6

FormulaC1707H2639N463O517S6
Total Number of Atoms:5332


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    43320
Absorption 0.1% (=1 g/l)    1.137,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43320
Absorption 0.1% (=1 g/l)    1.137,   assuming all CYS residues are reduced
Aromaticity:0.110

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.70, 31.12, 23.05]

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:82.3631
Grand average of hydropathicity (GRAVY):-0.27