Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4424
Number of amino acids:486
Molecular Weight:55638.66 Da
Theoretical pI:8.4


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)306.17%
Cysteine CYS (C)132.67%
Glutamic Acid GLU (E)336.79%
Aspartic Acid ASP (D)204.12%
Glycine GLY (G)255.14%
Phynylalanine PHE (F)224.53%
Isoleucine ILE (I)255.14%
Histidine HIS (H)91.85%
Lysine LYS (K)377.61%
Methionine MET (M)173.5%
Leucine LEU (L)336.79%
Asparagine ASN (N)306.17%
Glutamine GLN (Q)183.7%
Proline PRO (P)224.53%
Serine SER (S)357.2%
Arginine ARG (R)214.32%
Threonine THR (T)285.76%
Tryptophan TRP (W)91.85%
Valine VAL (V)347%
Tyrosine TYR (Y)255.14%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2488
HydrogenH3841
NitrogenN661
OxygenO729
SulphurS30

FormulaC2488H3841N661O729S30
Total Number of Atoms:7749


Total number of positively charged residues (ARG + LYS):58
Total number of negatively charged residues (ASP + GLU):53
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    87500
Absorption 0.1% (=1 g/l)    1.573,   assuming all pairs of CYS residues form cystines

Ext. coefficient    86750
Absorption 0.1% (=1 g/l)    1.559,   assuming all CYS residues are reduced
Aromaticity:0.115

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.00

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.45, 23.05, 23.25]

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:73.0041
Grand average of hydropathicity (GRAVY):-0.40