Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5826
Number of amino acids:107
Molecular Weight:12063.33 Da
Theoretical pI:6.93


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)43.74%
Cysteine CYS (C)21.87%
Glutamic Acid GLU (E)87.48%
Aspartic Acid ASP (D)54.67%
Glycine GLY (G)76.54%
Phynylalanine PHE (F)65.61%
Isoleucine ILE (I)1110.28%
Histidine HIS (H)21.87%
Lysine LYS (K)87.48%
Methionine MET (M)21.87%
Leucine LEU (L)1514.02%
Asparagine ASN (N)43.74%
Glutamine GLN (Q)21.87%
Proline PRO (P)54.67%
Serine SER (S)54.67%
Arginine ARG (R)54.67%
Threonine THR (T)43.74%
Tryptophan TRP (W)10.93%
Valine VAL (V)109.35%
Tyrosine TYR (Y)10.93%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC554
HydrogenH899
NitrogenN141
OxygenO150
SulphurS4

FormulaC554H899N141O150S4
Total Number of Atoms:1748


Total number of positively charged residues (ARG + LYS):13
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    7115
Absorption 0.1% (=1 g/l)    0.590,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.579,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.95

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[41.12, 19.63, 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:125.608
Grand average of hydropathicity (GRAVY):0.33