Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5506
Number of amino acids:233
Molecular Weight:25514.89 Da
Theoretical pI:8.55


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3314.16%
Cysteine CYS (C)31.29%
Glutamic Acid GLU (E)10.43%
Aspartic Acid ASP (D)10.43%
Glycine GLY (G)52.15%
Phynylalanine PHE (F)156.44%
Isoleucine ILE (I)104.29%
Histidine HIS (H)31.29%
Lysine LYS (K)10.43%
Methionine MET (M)41.72%
Leucine LEU (L)4519.31%
Asparagine ASN (N)104.29%
Glutamine GLN (Q)3816.31%
Proline PRO (P)219.01%
Serine SER (S)166.87%
Arginine ARG (R)31.29%
Threonine THR (T)73%
Tryptophan TRP (W)00%
Valine VAL (V)93.86%
Tyrosine TYR (Y)83.43%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1182
HydrogenH1847
NitrogenN297
OxygenO317
SulphurS7

FormulaC1182H1847N297O317S7
Total Number of Atoms:3650


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):2
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)    0.472,   assuming all pairs of CYS residues form cystines

Ext. coefficient    11920
Absorption 0.1% (=1 g/l)    0.467,   assuming all CYS residues are reduced
Aromaticity:0.099

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 65.32

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[37.34, 22.32, 35.62]

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:117.425
Grand average of hydropathicity (GRAVY):0.45