Physicochemical Properties of Peptide



PPepDB ID:PPepDB_750
Number of amino acids:224
Molecular Weight:24114.31 Da
Theoretical pI:6.98


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)146.25%
Cysteine CYS (C)167.14%
Glutamic Acid GLU (E)62.68%
Aspartic Acid ASP (D)94.02%
Glycine GLY (G)198.48%
Phynylalanine PHE (F)167.14%
Isoleucine ILE (I)62.68%
Histidine HIS (H)156.7%
Lysine LYS (K)94.02%
Methionine MET (M)10.45%
Leucine LEU (L)135.8%
Asparagine ASN (N)114.91%
Glutamine GLN (Q)52.23%
Proline PRO (P)208.93%
Serine SER (S)208.93%
Arginine ARG (R)52.23%
Threonine THR (T)156.7%
Tryptophan TRP (W)31.34%
Valine VAL (V)188.04%
Tyrosine TYR (Y)31.34%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1070
HydrogenH1601
NitrogenN297
OxygenO309
SulphurS17

FormulaC1070H1601N297O309S17
Total Number of Atoms:3294


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):15
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    21970
Absorption 0.1% (=1 g/l)    0.911,   assuming all pairs of CYS residues form cystines

Ext. coefficient    20970
Absorption 0.1% (=1 g/l)    0.870,   assuming all CYS residues are reduced
Aromaticity:0.098

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 43.82

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.34, 31.25, 15.18]

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:62.6339
Grand average of hydropathicity (GRAVY):-0.10