Physicochemical Properties of Peptide



PPepDB ID:PPepDB_849
Number of amino acids:155
Molecular Weight:16430.19 Da
Theoretical pI:7.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)106.45%
Cysteine CYS (C)138.39%
Glutamic Acid GLU (E)106.45%
Aspartic Acid ASP (D)31.94%
Glycine GLY (G)1610.32%
Phynylalanine PHE (F)74.52%
Isoleucine ILE (I)53.23%
Histidine HIS (H)00%
Lysine LYS (K)117.1%
Methionine MET (M)53.23%
Leucine LEU (L)1710.97%
Asparagine ASN (N)63.87%
Glutamine GLN (Q)31.94%
Proline PRO (P)95.81%
Serine SER (S)106.45%
Arginine ARG (R)42.58%
Threonine THR (T)1811.61%
Tryptophan TRP (W)21.29%
Valine VAL (V)63.87%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC711
HydrogenH1153
NitrogenN189
OxygenO219
SulphurS18

FormulaC711H1153N189O219S18
Total Number of Atoms:2290


Total number of positively charged residues (ARG + LYS):15
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11750
Absorption 0.1% (=1 g/l)    0.715,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11000
Absorption 0.1% (=1 g/l)    0.669,   assuming all CYS residues are reduced
Aromaticity:0.058

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.57

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.87, 26.45, 27.10]

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:73.0321
Grand average of hydropathicity (GRAVY):0.07