Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5851
Number of amino acids:247
Molecular Weight:26205.14 Da
Theoretical pI:5.54


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)166.48%
Cysteine CYS (C)10.4%
Glutamic Acid GLU (E)135.26%
Aspartic Acid ASP (D)93.64%
Glycine GLY (G)218.5%
Phynylalanine PHE (F)72.83%
Isoleucine ILE (I)114.45%
Histidine HIS (H)10.4%
Lysine LYS (K)124.86%
Methionine MET (M)62.43%
Leucine LEU (L)3413.77%
Asparagine ASN (N)135.26%
Glutamine GLN (Q)114.45%
Proline PRO (P)187.29%
Serine SER (S)239.31%
Arginine ARG (R)83.24%
Threonine THR (T)197.69%
Tryptophan TRP (W)00%
Valine VAL (V)208.1%
Tyrosine TYR (Y)41.62%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1161
HydrogenH1901
NitrogenN309
OxygenO362
SulphurS7

FormulaC1161H1901N309O362S7
Total Number of Atoms:3740


Total number of positively charged residues (ARG + LYS):20
Total number of negatively charged residues (ASP + GLU):22
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    5960
Absorption 0.1% (=1 g/l)    0.227,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.227,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.36

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.77, 30.36, 27.94]

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:101.012
Grand average of hydropathicity (GRAVY):0.02