Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4339
Number of amino acids:217
Molecular Weight:23792.37 Da
Theoretical pI:5.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)83.69%
Cysteine CYS (C)52.3%
Glutamic Acid GLU (E)146.45%
Aspartic Acid ASP (D)104.61%
Glycine GLY (G)2210.14%
Phynylalanine PHE (F)188.29%
Isoleucine ILE (I)156.91%
Histidine HIS (H)20.92%
Lysine LYS (K)135.99%
Methionine MET (M)10.46%
Leucine LEU (L)198.76%
Asparagine ASN (N)115.07%
Glutamine GLN (Q)83.69%
Proline PRO (P)156.91%
Serine SER (S)125.53%
Arginine ARG (R)73.23%
Threonine THR (T)115.07%
Tryptophan TRP (W)10.46%
Valine VAL (V)219.68%
Tyrosine TYR (Y)41.84%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1087
HydrogenH1687
NitrogenN275
OxygenO312
SulphurS6

FormulaC1087H1687N275O312S6
Total Number of Atoms:3367


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):24
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    11710
Absorption 0.1% (=1 g/l)    0.492,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11460
Absorption 0.1% (=1 g/l)    0.482,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[35.94, 27.65, 19.35]

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:92.8571
Grand average of hydropathicity (GRAVY):0.05