Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5497
Number of amino acids:462
Molecular Weight:52098.36 Da
Theoretical pI:8.68


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)316.71%
Cysteine CYS (C)91.95%
Glutamic Acid GLU (E)173.68%
Aspartic Acid ASP (D)255.41%
Glycine GLY (G)326.93%
Phynylalanine PHE (F)163.46%
Isoleucine ILE (I)204.33%
Histidine HIS (H)122.6%
Lysine LYS (K)265.63%
Methionine MET (M)112.38%
Leucine LEU (L)4910.61%
Asparagine ASN (N)326.93%
Glutamine GLN (Q)102.16%
Proline PRO (P)296.28%
Serine SER (S)398.44%
Arginine ARG (R)224.76%
Threonine THR (T)214.55%
Tryptophan TRP (W)153.25%
Valine VAL (V)245.19%
Tyrosine TYR (Y)224.76%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2349
HydrogenH3585
NitrogenN635
OxygenO671
SulphurS20

FormulaC2349H3585N635O671S20
Total Number of Atoms:7260


Total number of positively charged residues (ARG + LYS):48
Total number of negatively charged residues (ASP + GLU):42
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    115780
Absorption 0.1% (=1 g/l)    2.222,   assuming all pairs of CYS residues form cystines

Ext. coefficient    115280
Absorption 0.1% (=1 g/l)    2.213,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.60, 28.57, 23.38]

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:80.0218
Grand average of hydropathicity (GRAVY):-0.34