Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5339
Number of amino acids:319
Molecular Weight:34344.49 Da
Theoretical pI:6.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)237.21%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)216.58%
Aspartic Acid ASP (D)82.51%
Glycine GLY (G)299.09%
Phynylalanine PHE (F)165.02%
Isoleucine ILE (I)154.7%
Histidine HIS (H)10.31%
Lysine LYS (K)237.21%
Methionine MET (M)51.57%
Leucine LEU (L)278.46%
Asparagine ASN (N)237.21%
Glutamine GLN (Q)165.02%
Proline PRO (P)257.84%
Serine SER (S)165.02%
Arginine ARG (R)61.88%
Threonine THR (T)165.02%
Tryptophan TRP (W)00%
Valine VAL (V)3711.6%
Tyrosine TYR (Y)103.13%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1555
HydrogenH2463
NitrogenN401
OxygenO459
SulphurS7

FormulaC1555H2463N401O459S7
Total Number of Atoms:4885


Total number of positively charged residues (ARG + LYS):29
Total number of negatively charged residues (ASP + GLU):29
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    15025
Absorption 0.1% (=1 g/l)    0.437,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14900
Absorption 0.1% (=1 g/l)    0.434,   assuming all CYS residues are reduced
Aromaticity:0.082

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 24.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.92, 29.15, 23.82]

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:92.1942
Grand average of hydropathicity (GRAVY):-0.06