Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1047
Number of amino acids:111
Molecular Weight:12098.29 Da
Theoretical pI:7.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)119.91%
Cysteine CYS (C)65.41%
Glutamic Acid GLU (E)76.31%
Aspartic Acid ASP (D)43.6%
Glycine GLY (G)32.7%
Phynylalanine PHE (F)54.5%
Isoleucine ILE (I)1311.71%
Histidine HIS (H)10.9%
Lysine LYS (K)119.91%
Methionine MET (M)43.6%
Leucine LEU (L)98.11%
Asparagine ASN (N)76.31%
Glutamine GLN (Q)21.8%
Proline PRO (P)54.5%
Serine SER (S)98.11%
Arginine ARG (R)10.9%
Threonine THR (T)76.31%
Tryptophan TRP (W)00%
Valine VAL (V)54.5%
Tyrosine TYR (Y)10.9%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC535
HydrogenH880
NitrogenN136
OxygenO160
SulphurS10

FormulaC535H880N136O160S10
Total Number of Atoms:1721


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):11
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    1865
Absorption 0.1% (=1 g/l)    0.154,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.123,   assuming all CYS residues are reduced
Aromaticity:0.054

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.06

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.73, 21.62, 27.93]

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:100.27
Grand average of hydropathicity (GRAVY):0.24