Physicochemical Properties of Peptide



PPepDB ID:PPepDB_804
Number of amino acids:238
Molecular Weight:24904.63 Da
Theoretical pI:4.79


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)229.24%
Cysteine CYS (C)166.72%
Glutamic Acid GLU (E)72.94%
Aspartic Acid ASP (D)125.04%
Glycine GLY (G)2711.34%
Phynylalanine PHE (F)156.3%
Isoleucine ILE (I)62.52%
Histidine HIS (H)10.42%
Lysine LYS (K)72.94%
Methionine MET (M)20.84%
Leucine LEU (L)135.46%
Asparagine ASN (N)114.62%
Glutamine GLN (Q)52.1%
Proline PRO (P)145.88%
Serine SER (S)2811.76%
Arginine ARG (R)72.94%
Threonine THR (T)229.24%
Tryptophan TRP (W)31.26%
Valine VAL (V)104.2%
Tyrosine TYR (Y)104.2%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1084
HydrogenH1627
NitrogenN287
OxygenO353
SulphurS18

FormulaC1084H1627N287O353S18
Total Number of Atoms:3369


Total number of positively charged residues (ARG + LYS):14
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    32400
Absorption 0.1% (=1 g/l)    1.301,   assuming all pairs of CYS residues form cystines

Ext. coefficient    31400
Absorption 0.1% (=1 g/l)    1.261,   assuming all CYS residues are reduced
Aromaticity:0.118

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 52.42

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.95, 33.61, 18.49]

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:52.563
Grand average of hydropathicity (GRAVY):-0.12