Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5039
Number of amino acids:224
Molecular Weight:23562.24 Da
Theoretical pI:8.59


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)188.04%
Cysteine CYS (C)20.89%
Glutamic Acid GLU (E)83.57%
Aspartic Acid ASP (D)83.57%
Glycine GLY (G)2310.27%
Phynylalanine PHE (F)135.8%
Isoleucine ILE (I)73.13%
Histidine HIS (H)52.23%
Lysine LYS (K)125.36%
Methionine MET (M)94.02%
Leucine LEU (L)2310.27%
Asparagine ASN (N)135.8%
Glutamine GLN (Q)31.34%
Proline PRO (P)167.14%
Serine SER (S)229.82%
Arginine ARG (R)62.68%
Threonine THR (T)114.91%
Tryptophan TRP (W)10.45%
Valine VAL (V)229.82%
Tyrosine TYR (Y)20.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1054
HydrogenH1673
NitrogenN281
OxygenO308
SulphurS11

FormulaC1054H1673N281O308S11
Total Number of Atoms:3327


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):16
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    8605
Absorption 0.1% (=1 g/l)    0.365,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8480
Absorption 0.1% (=1 g/l)    0.360,   assuming all CYS residues are reduced
Aromaticity:0.071

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 25.42

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.36, 33.04, 25.89]

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:88.7502
Grand average of hydropathicity (GRAVY):0.16