Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4323
Number of amino acids:487
Molecular Weight:54914.59 Da
Theoretical pI:7.69


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)214.31%
Cysteine CYS (C)91.85%
Glutamic Acid GLU (E)255.13%
Aspartic Acid ASP (D)255.13%
Glycine GLY (G)367.39%
Phynylalanine PHE (F)234.72%
Isoleucine ILE (I)265.34%
Histidine HIS (H)122.46%
Lysine LYS (K)316.37%
Methionine MET (M)91.85%
Leucine LEU (L)4910.06%
Asparagine ASN (N)306.16%
Glutamine GLN (Q)173.49%
Proline PRO (P)275.54%
Serine SER (S)367.39%
Arginine ARG (R)204.11%
Threonine THR (T)306.16%
Tryptophan TRP (W)71.44%
Valine VAL (V)316.37%
Tyrosine TYR (Y)234.72%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2474
HydrogenH3820
NitrogenN656
OxygenO724
SulphurS18

FormulaC2474H3820N656O724S18
Total Number of Atoms:7692


Total number of positively charged residues (ARG + LYS):51
Total number of negatively charged residues (ASP + GLU):50
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    73270
Absorption 0.1% (=1 g/l)    1.334,   assuming all pairs of CYS residues form cystines

Ext. coefficient    72770
Absorption 0.1% (=1 g/l)    1.325,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.18

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.65, 26.49, 21.36]

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:82.8337
Grand average of hydropathicity (GRAVY):-0.32