Physicochemical Properties of Peptide



PPepDB ID:PPepDB_941
Number of amino acids:240
Molecular Weight:24652.56 Da
Theoretical pI:4.83


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2410%
Cysteine CYS (C)177.08%
Glutamic Acid GLU (E)41.67%
Aspartic Acid ASP (D)135.42%
Glycine GLY (G)2610.83%
Phynylalanine PHE (F)114.58%
Isoleucine ILE (I)41.67%
Histidine HIS (H)10.42%
Lysine LYS (K)62.5%
Methionine MET (M)31.25%
Leucine LEU (L)166.67%
Asparagine ASN (N)62.5%
Glutamine GLN (Q)52.08%
Proline PRO (P)125%
Serine SER (S)3313.75%
Arginine ARG (R)72.92%
Threonine THR (T)2410%
Tryptophan TRP (W)31.25%
Valine VAL (V)166.67%
Tyrosine TYR (Y)93.75%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1063
HydrogenH1635
NitrogenN283
OxygenO352
SulphurS20

FormulaC1063H1635N283O352S20
Total Number of Atoms:3353


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):17
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    30910
Absorption 0.1% (=1 g/l)    1.254,   assuming all pairs of CYS residues form cystines

Ext. coefficient    29910
Absorption 0.1% (=1 g/l)    1.213,   assuming all CYS residues are reduced
Aromaticity:0.096

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.07

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.58, 32.08, 19.58]

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:61.8334
Grand average of hydropathicity (GRAVY):0.10