Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5928
Number of amino acids:116
Molecular Weight:12231.42 Da
Theoretical pI:8.92


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1412.07%
Cysteine CYS (C)97.76%
Glutamic Acid GLU (E)21.72%
Aspartic Acid ASP (D)54.31%
Glycine GLY (G)54.31%
Phynylalanine PHE (F)86.9%
Isoleucine ILE (I)65.17%
Histidine HIS (H)10.86%
Lysine LYS (K)1210.34%
Methionine MET (M)21.72%
Leucine LEU (L)108.62%
Asparagine ASN (N)43.45%
Glutamine GLN (Q)43.45%
Proline PRO (P)43.45%
Serine SER (S)1311.21%
Arginine ARG (R)10.86%
Threonine THR (T)76.03%
Tryptophan TRP (W)00%
Valine VAL (V)97.76%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC539
HydrogenH879
NitrogenN141
OxygenO159
SulphurS11

FormulaC539H879N141O159S11
Total Number of Atoms:1729


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):7
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    500
Absorption 0.1% (=1 g/l)    0.041,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.069

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 40.18

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.45, 22.41, 24.14]

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:88.3621
Grand average of hydropathicity (GRAVY):0.40