Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4762
Number of amino acids:258
Molecular Weight:29289.69 Da
Theoretical pI:6.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)135.04%
Cysteine CYS (C)166.2%
Glutamic Acid GLU (E)249.3%
Aspartic Acid ASP (D)83.1%
Glycine GLY (G)176.59%
Phynylalanine PHE (F)51.94%
Isoleucine ILE (I)145.43%
Histidine HIS (H)20.78%
Lysine LYS (K)72.71%
Methionine MET (M)51.94%
Leucine LEU (L)155.81%
Asparagine ASN (N)72.71%
Glutamine GLN (Q)4417.05%
Proline PRO (P)72.71%
Serine SER (S)249.3%
Arginine ARG (R)259.69%
Threonine THR (T)93.49%
Tryptophan TRP (W)00%
Valine VAL (V)124.65%
Tyrosine TYR (Y)41.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1208
HydrogenH1983
NitrogenN395
OxygenO411
SulphurS21

FormulaC1208H1983N395O411S21
Total Number of Atoms:4018


Total number of positively charged residues (ARG + LYS):32
Total number of negatively charged residues (ASP + GLU):32
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    6960
Absorption 0.1% (=1 g/l)    0.238,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.203,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 78.02

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[19.38, 21.32, 22.09]

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:62.3643
Grand average of hydropathicity (GRAVY):-0.88