Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4882
Number of amino acids:493
Molecular Weight:55136.79 Da
Theoretical pI:6.24


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)306.09%
Cysteine CYS (C)102.03%
Glutamic Acid GLU (E)316.29%
Aspartic Acid ASP (D)234.67%
Glycine GLY (G)428.52%
Phynylalanine PHE (F)122.43%
Isoleucine ILE (I)204.06%
Histidine HIS (H)183.65%
Lysine LYS (K)316.29%
Methionine MET (M)214.26%
Leucine LEU (L)357.1%
Asparagine ASN (N)244.87%
Glutamine GLN (Q)173.45%
Proline PRO (P)255.07%
Serine SER (S)357.1%
Arginine ARG (R)163.25%
Threonine THR (T)224.46%
Tryptophan TRP (W)91.83%
Valine VAL (V)448.92%
Tyrosine TYR (Y)285.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2454
HydrogenH3774
NitrogenN658
OxygenO728
SulphurS31

FormulaC2454H3774N658O728S31
Total Number of Atoms:7645


Total number of positively charged residues (ARG + LYS):47
Total number of negatively charged residues (ASP + GLU):54
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    91845
Absorption 0.1% (=1 g/l)    1.666,   assuming all pairs of CYS residues form cystines

Ext. coefficient    91220
Absorption 0.1% (=1 g/l)    1.654,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.20

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.02, 25.56, 23.73]

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:75.4767
Grand average of hydropathicity (GRAVY):-0.34