Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5258
Number of amino acids:499
Molecular Weight:54096.14 Da
Theoretical pI:6.45


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)428.42%
Cysteine CYS (C)102%
Glutamic Acid GLU (E)214.21%
Aspartic Acid ASP (D)234.61%
Glycine GLY (G)5611.22%
Phynylalanine PHE (F)214.21%
Isoleucine ILE (I)204.01%
Histidine HIS (H)153.01%
Lysine LYS (K)244.81%
Methionine MET (M)81.6%
Leucine LEU (L)428.42%
Asparagine ASN (N)183.61%
Glutamine GLN (Q)122.4%
Proline PRO (P)285.61%
Serine SER (S)448.82%
Arginine ARG (R)163.21%
Threonine THR (T)275.41%
Tryptophan TRP (W)122.4%
Valine VAL (V)346.81%
Tyrosine TYR (Y)265.21%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2444
HydrogenH3689
NitrogenN643
OxygenO715
SulphurS18

FormulaC2444H3689N643O715S18
Total Number of Atoms:7509


Total number of positively charged residues (ARG + LYS):40
Total number of negatively charged residues (ASP + GLU):44
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    105365
Absorption 0.1% (=1 g/l)    1.948,   assuming all pairs of CYS residues form cystines

Ext. coefficient    104740
Absorption 0.1% (=1 g/l)    1.936,   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 : 44.24

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.06, 29.26, 22.65]

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:76.6333
Grand average of hydropathicity (GRAVY):-0.14