Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5925
Number of amino acids:247
Molecular Weight:26506.1 Da
Theoretical pI:5.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)197.69%
Cysteine CYS (C)20.81%
Glutamic Acid GLU (E)62.43%
Aspartic Acid ASP (D)93.64%
Glycine GLY (G)145.67%
Phynylalanine PHE (F)135.26%
Isoleucine ILE (I)145.67%
Histidine HIS (H)31.21%
Lysine LYS (K)83.24%
Methionine MET (M)31.21%
Leucine LEU (L)2710.93%
Asparagine ASN (N)124.86%
Glutamine GLN (Q)197.69%
Proline PRO (P)156.07%
Serine SER (S)2811.34%
Arginine ARG (R)41.62%
Threonine THR (T)249.72%
Tryptophan TRP (W)00%
Valine VAL (V)197.69%
Tyrosine TYR (Y)83.24%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1190
HydrogenH1876
NitrogenN304
OxygenO369
SulphurS5

FormulaC1190H1876N304O369S5
Total Number of Atoms:3744


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):15
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    12045
Absorption 0.1% (=1 g/l)    0.454,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.450,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.39

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.79, 27.94, 22.27]

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:94.737
Grand average of hydropathicity (GRAVY):0.11