Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1348
Number of amino acids:244
Molecular Weight:25936.78 Da
Theoretical pI:7.78


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.38%
Cysteine CYS (C)208.2%
Glutamic Acid GLU (E)104.1%
Aspartic Acid ASP (D)93.69%
Glycine GLY (G)2811.48%
Phynylalanine PHE (F)124.92%
Isoleucine ILE (I)104.1%
Histidine HIS (H)62.46%
Lysine LYS (K)135.33%
Methionine MET (M)31.23%
Leucine LEU (L)197.79%
Asparagine ASN (N)62.46%
Glutamine GLN (Q)72.87%
Proline PRO (P)156.15%
Serine SER (S)218.61%
Arginine ARG (R)83.28%
Threonine THR (T)156.15%
Tryptophan TRP (W)31.23%
Valine VAL (V)145.74%
Tyrosine TYR (Y)72.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1138
HydrogenH1765
NitrogenN309
OxygenO339
SulphurS23

FormulaC1138H1765N309O339S23
Total Number of Atoms:3574


Total number of positively charged residues (ARG + LYS):21
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    28180
Absorption 0.1% (=1 g/l)    1.086,   assuming all pairs of CYS residues form cystines

Ext. coefficient    26930
Absorption 0.1% (=1 g/l)    1.038,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.64, 28.69, 20.49]

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:70.3689
Grand average of hydropathicity (GRAVY):0.02