Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4677
Number of amino acids:658
Molecular Weight:71751.52 Da
Theoretical pI:7.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)345.17%
Cysteine CYS (C)71.06%
Glutamic Acid GLU (E)406.08%
Aspartic Acid ASP (D)243.65%
Glycine GLY (G)487.29%
Phynylalanine PHE (F)253.8%
Isoleucine ILE (I)253.8%
Histidine HIS (H)131.98%
Lysine LYS (K)284.26%
Methionine MET (M)111.67%
Leucine LEU (L)8613.07%
Asparagine ASN (N)416.23%
Glutamine GLN (Q)213.19%
Proline PRO (P)365.47%
Serine SER (S)8212.46%
Arginine ARG (R)365.47%
Threonine THR (T)365.47%
Tryptophan TRP (W)60.91%
Valine VAL (V)497.45%
Tyrosine TYR (Y)101.52%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3163
HydrogenH5074
NitrogenN888
OxygenO977
SulphurS18

FormulaC3163H5074N888O977S18
Total Number of Atoms:10120


Total number of positively charged residues (ARG + LYS):64
Total number of negatively charged residues (ASP + GLU):64
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    48275
Absorption 0.1% (=1 g/l)    0.673,   assuming all pairs of CYS residues form cystines

Ext. coefficient    47900
Absorption 0.1% (=1 g/l)    0.668,   assuming all CYS residues are reduced
Aromaticity:0.062

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.17

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.55, 31.46, 25.99]

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:92.5532
Grand average of hydropathicity (GRAVY):-0.19