Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5442
Number of amino acids:286
Molecular Weight:31358.1 Da
Theoretical pI:5.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)269.09%
Cysteine CYS (C)82.8%
Glutamic Acid GLU (E)103.5%
Aspartic Acid ASP (D)196.64%
Glycine GLY (G)289.79%
Phynylalanine PHE (F)175.94%
Isoleucine ILE (I)113.85%
Histidine HIS (H)72.45%
Lysine LYS (K)113.85%
Methionine MET (M)62.1%
Leucine LEU (L)165.59%
Asparagine ASN (N)165.59%
Glutamine GLN (Q)72.45%
Proline PRO (P)175.94%
Serine SER (S)227.69%
Arginine ARG (R)144.9%
Threonine THR (T)165.59%
Tryptophan TRP (W)72.45%
Valine VAL (V)175.94%
Tyrosine TYR (Y)113.85%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1396
HydrogenH2089
NitrogenN383
OxygenO417
SulphurS14

FormulaC1396H2089N383O417S14
Total Number of Atoms:4299


Total number of positively charged residues (ARG + LYS):25
Total number of negatively charged residues (ASP + GLU):29
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    55390
Absorption 0.1% (=1 g/l)    1.766,   assuming all pairs of CYS residues form cystines

Ext. coefficient    54890
Absorption 0.1% (=1 g/l)    1.750,   assuming all CYS residues are reduced
Aromaticity:0.122

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.62, 29.02, 20.28]

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:63.1469
Grand average of hydropathicity (GRAVY):-0.32