Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4155
Number of amino acids:513
Molecular Weight:56463.03 Da
Theoretical pI:5.02


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6212.09%
Cysteine CYS (C)40.78%
Glutamic Acid GLU (E)468.97%
Aspartic Acid ASP (D)346.63%
Glycine GLY (G)316.04%
Phynylalanine PHE (F)326.24%
Isoleucine ILE (I)244.68%
Histidine HIS (H)122.34%
Lysine LYS (K)468.97%
Methionine MET (M)30.58%
Leucine LEU (L)407.8%
Asparagine ASN (N)163.12%
Glutamine GLN (Q)142.73%
Proline PRO (P)326.24%
Serine SER (S)265.07%
Arginine ARG (R)101.95%
Threonine THR (T)173.31%
Tryptophan TRP (W)40.78%
Valine VAL (V)428.19%
Tyrosine TYR (Y)183.51%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2577
HydrogenH3953
NitrogenN647
OxygenO765
SulphurS7

FormulaC2577H3953N647O765S7
Total Number of Atoms:7949


Total number of positively charged residues (ARG + LYS):56
Total number of negatively charged residues (ASP + GLU):80
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49070
Absorption 0.1% (=1 g/l)    0.869,   assuming all pairs of CYS residues form cystines

Ext. coefficient    48820
Absorption 0.1% (=1 g/l)    0.865,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.19, 20.47, 29.43]

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:84.4834
Grand average of hydropathicity (GRAVY):-0.23