Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4724
Number of amino acids:491
Molecular Weight:53197.76 Da
Theoretical pI:5.33


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)6613.44%
Cysteine CYS (C)71.43%
Glutamic Acid GLU (E)204.07%
Aspartic Acid ASP (D)295.91%
Glycine GLY (G)397.94%
Phynylalanine PHE (F)204.07%
Isoleucine ILE (I)183.67%
Histidine HIS (H)102.04%
Lysine LYS (K)234.68%
Methionine MET (M)122.44%
Leucine LEU (L)418.35%
Asparagine ASN (N)265.3%
Glutamine GLN (Q)224.48%
Proline PRO (P)255.09%
Serine SER (S)357.13%
Arginine ARG (R)142.85%
Threonine THR (T)275.5%
Tryptophan TRP (W)102.04%
Valine VAL (V)255.09%
Tyrosine TYR (Y)224.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2374
HydrogenH3614
NitrogenN634
OxygenO722
SulphurS19

FormulaC2374H3614N634O722S19
Total Number of Atoms:7363


Total number of positively charged residues (ARG + LYS):37
Total number of negatively charged residues (ASP + GLU):49
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    88155
Absorption 0.1% (=1 g/l)    1.657,   assuming all pairs of CYS residues form cystines

Ext. coefficient    87780
Absorption 0.1% (=1 g/l)    1.650,   assuming all CYS residues are reduced
Aromaticity:0.106

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.89

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.70, 25.46, 28.31]

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:75.0714
Grand average of hydropathicity (GRAVY):-0.22