Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4678
Number of amino acids:499
Molecular Weight:56550.58 Da
Theoretical pI:9.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)357.01%
Cysteine CYS (C)71.4%
Glutamic Acid GLU (E)275.41%
Aspartic Acid ASP (D)122.4%
Glycine GLY (G)336.61%
Phynylalanine PHE (F)285.61%
Isoleucine ILE (I)265.21%
Histidine HIS (H)112.2%
Lysine LYS (K)163.21%
Methionine MET (M)61.2%
Leucine LEU (L)357.01%
Asparagine ASN (N)357.01%
Glutamine GLN (Q)5511.02%
Proline PRO (P)224.41%
Serine SER (S)408.02%
Arginine ARG (R)346.81%
Threonine THR (T)173.41%
Tryptophan TRP (W)40.8%
Valine VAL (V)377.41%
Tyrosine TYR (Y)193.81%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2502
HydrogenH3881
NitrogenN733
OxygenO744
SulphurS13

FormulaC2502H3881N733O744S13
Total Number of Atoms:7873


Total number of positively charged residues (ARG + LYS):50
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    50685
Absorption 0.1% (=1 g/l)    0.896,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50310
Absorption 0.1% (=1 g/l)    0.890,   assuming all CYS residues are reduced
Aromaticity:0.102

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 49.03

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.86, 26.05, 20.64]

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:76.1924
Grand average of hydropathicity (GRAVY):-0.49