Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5226
Number of amino acids:229
Molecular Weight:24736.35 Da
Theoretical pI:6.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)187.86%
Cysteine CYS (C)31.31%
Glutamic Acid GLU (E)62.62%
Aspartic Acid ASP (D)135.68%
Glycine GLY (G)198.3%
Phynylalanine PHE (F)187.86%
Isoleucine ILE (I)125.24%
Histidine HIS (H)41.75%
Lysine LYS (K)104.37%
Methionine MET (M)31.31%
Leucine LEU (L)198.3%
Asparagine ASN (N)177.42%
Glutamine GLN (Q)62.62%
Proline PRO (P)135.68%
Serine SER (S)156.55%
Arginine ARG (R)83.49%
Threonine THR (T)114.8%
Tryptophan TRP (W)00%
Valine VAL (V)2812.23%
Tyrosine TYR (Y)62.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1124
HydrogenH1744
NitrogenN294
OxygenO323
SulphurS6

FormulaC1124H1744N294O323S6
Total Number of Atoms:3491


Total number of positively charged residues (ARG + LYS):18
Total number of negatively charged residues (ASP + GLU):19
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    9065
Absorption 0.1% (=1 g/l)    0.366,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8940
Absorption 0.1% (=1 g/l)    0.361,   assuming all CYS residues are reduced
Aromaticity:0.105

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 27.19

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[36.24, 27.95, 20.09]

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:96.1136
Grand average of hydropathicity (GRAVY):0.21