Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5609
Number of amino acids:496
Molecular Weight:54290.73 Da
Theoretical pI:8.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)336.65%
Cysteine CYS (C)51.01%
Glutamic Acid GLU (E)193.83%
Aspartic Acid ASP (D)204.03%
Glycine GLY (G)5310.69%
Phynylalanine PHE (F)204.03%
Isoleucine ILE (I)244.84%
Histidine HIS (H)102.02%
Lysine LYS (K)153.02%
Methionine MET (M)61.21%
Leucine LEU (L)418.27%
Asparagine ASN (N)295.85%
Glutamine GLN (Q)6112.3%
Proline PRO (P)255.04%
Serine SER (S)387.66%
Arginine ARG (R)285.65%
Threonine THR (T)193.83%
Tryptophan TRP (W)51.01%
Valine VAL (V)346.85%
Tyrosine TYR (Y)112.22%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2373
HydrogenH3734
NitrogenN710
OxygenO733
SulphurS11

FormulaC2373H3734N710O733S11
Total Number of Atoms:7561


Total number of positively charged residues (ARG + LYS):43
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    44140
Absorption 0.1% (=1 g/l)    0.813,   assuming all pairs of CYS residues form cystines

Ext. coefficient    43890
Absorption 0.1% (=1 g/l)    0.808,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.30

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.22, 29.23, 19.96]

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:77.6411
Grand average of hydropathicity (GRAVY):-0.50