Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1323
Number of amino acids:245
Molecular Weight:26188.25 Da
Theoretical pI:7.37


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)145.71%
Cysteine CYS (C)187.35%
Glutamic Acid GLU (E)83.27%
Aspartic Acid ASP (D)114.49%
Glycine GLY (G)2811.43%
Phynylalanine PHE (F)114.49%
Isoleucine ILE (I)124.9%
Histidine HIS (H)41.63%
Lysine LYS (K)145.71%
Methionine MET (M)41.63%
Leucine LEU (L)228.98%
Asparagine ASN (N)93.67%
Glutamine GLN (Q)93.67%
Proline PRO (P)166.53%
Serine SER (S)197.76%
Arginine ARG (R)62.45%
Threonine THR (T)124.9%
Tryptophan TRP (W)31.22%
Valine VAL (V)176.94%
Tyrosine TYR (Y)83.27%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1159
HydrogenH1806
NitrogenN306
OxygenO341
SulphurS22

FormulaC1159H1806N306O341S22
Total Number of Atoms:3634


Total number of positively charged residues (ARG + LYS):20
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    29545
Absorption 0.1% (=1 g/l)    1.128,   assuming all pairs of CYS residues form cystines

Ext. coefficient    28420
Absorption 0.1% (=1 g/l)    1.085,   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 : 41.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.80, 29.39, 19.59]

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:79.9592
Grand average of hydropathicity (GRAVY):0.08