Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5872
Number of amino acids:269
Molecular Weight:28985.41 Da
Theoretical pI:8.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)248.92%
Cysteine CYS (C)93.35%
Glutamic Acid GLU (E)82.97%
Aspartic Acid ASP (D)124.46%
Glycine GLY (G)2810.41%
Phynylalanine PHE (F)103.72%
Isoleucine ILE (I)155.58%
Histidine HIS (H)20.74%
Lysine LYS (K)165.95%
Methionine MET (M)93.35%
Leucine LEU (L)134.83%
Asparagine ASN (N)145.2%
Glutamine GLN (Q)82.97%
Proline PRO (P)238.55%
Serine SER (S)155.58%
Arginine ARG (R)93.35%
Threonine THR (T)145.2%
Tryptophan TRP (W)62.23%
Valine VAL (V)238.55%
Tyrosine TYR (Y)114.09%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1300
HydrogenH2008
NitrogenN344
OxygenO372
SulphurS18

FormulaC1300H2008N344O372S18
Total Number of Atoms:4042


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    49890
Absorption 0.1% (=1 g/l)    1.721,   assuming all pairs of CYS residues form cystines

Ext. coefficient    49390
Absorption 0.1% (=1 g/l)    1.704,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.00, 29.74, 20.07]

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:74.3123
Grand average of hydropathicity (GRAVY):-0.08