Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4761
Number of amino acids:115
Molecular Weight:11693.79 Da
Theoretical pI:9.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1311.3%
Cysteine CYS (C)108.7%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)21.74%
Glycine GLY (G)97.83%
Phynylalanine PHE (F)32.61%
Isoleucine ILE (I)76.09%
Histidine HIS (H)00%
Lysine LYS (K)65.22%
Methionine MET (M)32.61%
Leucine LEU (L)108.7%
Asparagine ASN (N)54.35%
Glutamine GLN (Q)32.61%
Proline PRO (P)86.96%
Serine SER (S)1412.17%
Arginine ARG (R)32.61%
Threonine THR (T)97.83%
Tryptophan TRP (W)00%
Valine VAL (V)86.96%
Tyrosine TYR (Y)21.74%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC504
HydrogenH836
NitrogenN138
OxygenO153
SulphurS13

FormulaC504H836N138O153S13
Total Number of Atoms:1644


Total number of positively charged residues (ARG + LYS):9
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    3605
Absorption 0.1% (=1 g/l)    0.308,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.255,   assuming all CYS residues are reduced
Aromaticity:0.043

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 42.63

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.09, 31.30, 22.61]

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:89.1304
Grand average of hydropathicity (GRAVY):0.50