Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5728
Number of amino acids:264
Molecular Weight:28424.79 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)228.33%
Cysteine CYS (C)103.79%
Glutamic Acid GLU (E)93.41%
Aspartic Acid ASP (D)103.79%
Glycine GLY (G)2910.98%
Phynylalanine PHE (F)93.41%
Isoleucine ILE (I)155.68%
Histidine HIS (H)72.65%
Lysine LYS (K)124.55%
Methionine MET (M)41.52%
Leucine LEU (L)269.85%
Asparagine ASN (N)114.17%
Glutamine GLN (Q)31.14%
Proline PRO (P)134.92%
Serine SER (S)217.95%
Arginine ARG (R)155.68%
Threonine THR (T)166.06%
Tryptophan TRP (W)72.65%
Valine VAL (V)197.2%
Tyrosine TYR (Y)62.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1267
HydrogenH1996
NitrogenN356
OxygenO360
SulphurS14

FormulaC1267H1996N356O360S14
Total Number of Atoms:3993


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48065
Absorption 0.1% (=1 g/l)    1.691,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47440
Absorption 0.1% (=1 g/l)    1.669,   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 : 32.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.06, 28.03, 23.11]

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:89.7727
Grand average of hydropathicity (GRAVY):0.06