Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5166
Number of amino acids:249
Molecular Weight:26792.28 Da
Theoretical pI:5.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)239.24%
Cysteine CYS (C)114.42%
Glutamic Acid GLU (E)20.8%
Aspartic Acid ASP (D)114.42%
Glycine GLY (G)3413.65%
Phynylalanine PHE (F)124.82%
Isoleucine ILE (I)156.02%
Histidine HIS (H)20.8%
Lysine LYS (K)52.01%
Methionine MET (M)62.41%
Leucine LEU (L)176.83%
Asparagine ASN (N)166.43%
Glutamine GLN (Q)124.82%
Proline PRO (P)114.42%
Serine SER (S)156.02%
Arginine ARG (R)52.01%
Threonine THR (T)176.83%
Tryptophan TRP (W)93.61%
Valine VAL (V)114.42%
Tyrosine TYR (Y)156.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1207
HydrogenH1778
NitrogenN310
OxygenO351
SulphurS17

FormulaC1207H1778N310O351S17
Total Number of Atoms:3663


Total number of positively charged residues (ARG + LYS):10
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    72475
Absorption 0.1% (=1 g/l)    2.705,   assuming all pairs of CYS residues form cystines

Ext. coefficient    71850
Absorption 0.1% (=1 g/l)    2.682,   assuming all CYS residues are reduced
Aromaticity:0.145

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.73, 30.52, 19.28]

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:72.1687
Grand average of hydropathicity (GRAVY):0.07