Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4428
Number of amino acids:748
Molecular Weight:83357.4 Da
Theoretical pI:6.34


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)364.81%
Cysteine CYS (C)283.74%
Glutamic Acid GLU (E)486.42%
Aspartic Acid ASP (D)435.75%
Glycine GLY (G)557.35%
Phynylalanine PHE (F)334.41%
Isoleucine ILE (I)405.35%
Histidine HIS (H)141.87%
Lysine LYS (K)405.35%
Methionine MET (M)131.74%
Leucine LEU (L)557.35%
Asparagine ASN (N)445.88%
Glutamine GLN (Q)273.61%
Proline PRO (P)354.68%
Serine SER (S)638.42%
Arginine ARG (R)466.15%
Threonine THR (T)405.35%
Tryptophan TRP (W)60.8%
Valine VAL (V)608.02%
Tyrosine TYR (Y)222.94%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3645
HydrogenH5745
NitrogenN1031
OxygenO1127
SulphurS41

FormulaC3645H5745N1031O1127S41
Total Number of Atoms:11589


Total number of positively charged residues (ARG + LYS):86
Total number of negatively charged residues (ASP + GLU):91
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    67530
Absorption 0.1% (=1 g/l)    0.810,   assuming all pairs of CYS residues form cystines

Ext. coefficient    65780
Absorption 0.1% (=1 g/l)    0.789,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 41.14

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.88, 26.34, 20.32]

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:77.6069
Grand average of hydropathicity (GRAVY):-0.36