Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5482
Number of amino acids:201
Molecular Weight:20364.58 Da
Theoretical pI:7.63


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)146.97%
Cysteine CYS (C)104.98%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)83.98%
Glycine GLY (G)2311.44%
Phynylalanine PHE (F)104.98%
Isoleucine ILE (I)31.49%
Histidine HIS (H)21%
Lysine LYS (K)83.98%
Methionine MET (M)21%
Leucine LEU (L)188.96%
Asparagine ASN (N)157.46%
Glutamine GLN (Q)41.99%
Proline PRO (P)146.97%
Serine SER (S)3014.93%
Arginine ARG (R)10.5%
Threonine THR (T)2612.94%
Tryptophan TRP (W)10.5%
Valine VAL (V)73.48%
Tyrosine TYR (Y)52.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC877
HydrogenH1362
NitrogenN236
OxygenO298
SulphurS12

FormulaC877H1362N236O298S12
Total Number of Atoms:2785


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):8
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    13575
Absorption 0.1% (=1 g/l)    0.667,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12950
Absorption 0.1% (=1 g/l)    0.636,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 28.05

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[21.89, 40.80, 16.92]

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:57.8109
Grand average of hydropathicity (GRAVY):-0.12