Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5149
Number of amino acids:229
Molecular Weight:26278.43 Da
Theoretical pI:9.17


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)52.18%
Cysteine CYS (C)93.93%
Glutamic Acid GLU (E)62.62%
Aspartic Acid ASP (D)135.68%
Glycine GLY (G)125.24%
Phynylalanine PHE (F)93.93%
Isoleucine ILE (I)2310.04%
Histidine HIS (H)62.62%
Lysine LYS (K)208.73%
Methionine MET (M)73.06%
Leucine LEU (L)135.68%
Asparagine ASN (N)156.55%
Glutamine GLN (Q)135.68%
Proline PRO (P)156.55%
Serine SER (S)146.11%
Arginine ARG (R)93.93%
Threonine THR (T)177.42%
Tryptophan TRP (W)41.75%
Valine VAL (V)114.8%
Tyrosine TYR (Y)83.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1171
HydrogenH1844
NitrogenN320
OxygenO335
SulphurS16

FormulaC1171H1844N320O335S16
Total Number of Atoms:3686


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):19
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    34420
Absorption 0.1% (=1 g/l)    1.310,   assuming all pairs of CYS residues form cystines

Ext. coefficient    33920
Absorption 0.1% (=1 g/l)    1.291,   assuming all CYS residues are reduced
Aromaticity:0.092

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.44

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.69, 24.45, 13.54]

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:77.4237
Grand average of hydropathicity (GRAVY):-0.43