Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4951
Number of amino acids:659
Molecular Weight:73568.66 Da
Theoretical pI:5.57


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)375.61%
Cysteine CYS (C)142.12%
Glutamic Acid GLU (E)487.28%
Aspartic Acid ASP (D)294.4%
Glycine GLY (G)527.89%
Phynylalanine PHE (F)345.16%
Isoleucine ILE (I)456.83%
Histidine HIS (H)81.21%
Lysine LYS (K)324.86%
Methionine MET (M)162.43%
Leucine LEU (L)578.65%
Asparagine ASN (N)375.61%
Glutamine GLN (Q)243.64%
Proline PRO (P)233.49%
Serine SER (S)588.8%
Arginine ARG (R)355.31%
Threonine THR (T)375.61%
Tryptophan TRP (W)81.21%
Valine VAL (V)436.53%
Tyrosine TYR (Y)223.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3267
HydrogenH5115
NitrogenN881
OxygenO992
SulphurS30

FormulaC3267H5115N881O992S30
Total Number of Atoms:10285


Total number of positively charged residues (ARG + LYS):67
Total number of negatively charged residues (ASP + GLU):77
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    77655
Absorption 0.1% (=1 g/l)    1.056,   assuming all pairs of CYS residues form cystines

Ext. coefficient    76780
Absorption 0.1% (=1 g/l)    1.044,   assuming all CYS residues are reduced
Aromaticity:0.097

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 47.43

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.71, 25.80, 23.98]

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:84.9014
Grand average of hydropathicity (GRAVY):-0.20