Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4729
Number of amino acids:293
Molecular Weight:33680.98 Da
Theoretical pI:7.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)206.83%
Cysteine CYS (C)62.05%
Glutamic Acid GLU (E)124.1%
Aspartic Acid ASP (D)217.17%
Glycine GLY (G)186.14%
Phynylalanine PHE (F)186.14%
Isoleucine ILE (I)134.44%
Histidine HIS (H)62.05%
Lysine LYS (K)134.44%
Methionine MET (M)62.05%
Leucine LEU (L)155.12%
Asparagine ASN (N)134.44%
Glutamine GLN (Q)93.07%
Proline PRO (P)206.83%
Serine SER (S)248.19%
Arginine ARG (R)206.83%
Threonine THR (T)113.75%
Tryptophan TRP (W)93.07%
Valine VAL (V)227.51%
Tyrosine TYR (Y)175.8%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1527
HydrogenH2265
NitrogenN409
OxygenO434
SulphurS12

FormulaC1527H2265N409O434S12
Total Number of Atoms:4647


Total number of positively charged residues (ARG + LYS):33
Total number of negatively charged residues (ASP + GLU):33
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    75205
Absorption 0.1% (=1 g/l)    2.233,   assuming all pairs of CYS residues form cystines

Ext. coefficient    74830
Absorption 0.1% (=1 g/l)    2.222,   assuming all CYS residues are reduced
Aromaticity:0.150

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.51

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.08, 25.60, 18.09]

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:65.8703
Grand average of hydropathicity (GRAVY):-0.44