Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5289
Number of amino acids:124
Molecular Weight:13270.67 Da
Theoretical pI:7.76


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)129.68%
Cysteine CYS (C)86.45%
Glutamic Acid GLU (E)86.45%
Aspartic Acid ASP (D)43.23%
Glycine GLY (G)97.26%
Phynylalanine PHE (F)54.03%
Isoleucine ILE (I)21.61%
Histidine HIS (H)10.81%
Lysine LYS (K)108.06%
Methionine MET (M)43.23%
Leucine LEU (L)1814.52%
Asparagine ASN (N)32.42%
Glutamine GLN (Q)43.23%
Proline PRO (P)43.23%
Serine SER (S)64.84%
Arginine ARG (R)32.42%
Threonine THR (T)129.68%
Tryptophan TRP (W)10.81%
Valine VAL (V)108.06%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC582
HydrogenH961
NitrogenN153
OxygenO174
SulphurS12

FormulaC582H961N153O174S12
Total Number of Atoms:1882


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):12
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6000
Absorption 0.1% (=1 g/l)    0.452,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    0.414,   assuming all CYS residues are reduced
Aromaticity:0.048

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.75

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.03, 17.74, 33.87]

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:95.9676
Grand average of hydropathicity (GRAVY):0.29