Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1493
Number of amino acids:243
Molecular Weight:26095.12 Da
Theoretical pI:8.65


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3514.4%
Cysteine CYS (C)72.88%
Glutamic Acid GLU (E)31.23%
Aspartic Acid ASP (D)166.58%
Glycine GLY (G)2911.93%
Phynylalanine PHE (F)135.35%
Isoleucine ILE (I)104.12%
Histidine HIS (H)62.47%
Lysine LYS (K)83.29%
Methionine MET (M)20.82%
Leucine LEU (L)114.53%
Asparagine ASN (N)93.7%
Glutamine GLN (Q)93.7%
Proline PRO (P)145.76%
Serine SER (S)145.76%
Arginine ARG (R)156.17%
Threonine THR (T)145.76%
Tryptophan TRP (W)62.47%
Valine VAL (V)104.12%
Tyrosine TYR (Y)124.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1163
HydrogenH1734
NitrogenN332
OxygenO340
SulphurS9

FormulaC1163H1734N332O340S9
Total Number of Atoms:3578


Total number of positively charged residues (ARG + LYS):23
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    51255
Absorption 0.1% (=1 g/l)    1.964,   assuming all pairs of CYS residues form cystines

Ext. coefficient    50880
Absorption 0.1% (=1 g/l)    1.950,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.51, 27.16, 20.99]

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:60.0412
Grand average of hydropathicity (GRAVY):-0.30