Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5286
Number of amino acids:321
Molecular Weight:35616.39 Da
Theoretical pI:8.82


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)164.98%
Cysteine CYS (C)20.62%
Glutamic Acid GLU (E)185.61%
Aspartic Acid ASP (D)113.43%
Glycine GLY (G)226.85%
Phynylalanine PHE (F)164.98%
Isoleucine ILE (I)3510.9%
Histidine HIS (H)10.31%
Lysine LYS (K)257.79%
Methionine MET (M)41.25%
Leucine LEU (L)268.1%
Asparagine ASN (N)237.17%
Glutamine GLN (Q)175.3%
Proline PRO (P)247.48%
Serine SER (S)185.61%
Arginine ARG (R)82.49%
Threonine THR (T)144.36%
Tryptophan TRP (W)10.31%
Valine VAL (V)288.72%
Tyrosine TYR (Y)123.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1632
HydrogenH2593
NitrogenN413
OxygenO464
SulphurS6

FormulaC1632H2593N413O464S6
Total Number of Atoms:5108


Total number of positively charged residues (ARG + LYS):33
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    23505
Absorption 0.1% (=1 g/l)    0.660,   assuming all pairs of CYS residues form cystines

Ext. coefficient    23380
Absorption 0.1% (=1 g/l)    0.656,   assuming all CYS residues are reduced
Aromaticity:0.090

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 30.75

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.76, 27.10, 19.94]

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:104.392
Grand average of hydropathicity (GRAVY):-0.02