Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1531
Number of amino acids:92
Molecular Weight:9613.17 Da
Theoretical pI:6.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)88.7%
Cysteine CYS (C)66.52%
Glutamic Acid GLU (E)66.52%
Aspartic Acid ASP (D)11.09%
Glycine GLY (G)77.61%
Phynylalanine PHE (F)22.17%
Isoleucine ILE (I)88.7%
Histidine HIS (H)11.09%
Lysine LYS (K)77.61%
Methionine MET (M)00%
Leucine LEU (L)1111.96%
Asparagine ASN (N)99.78%
Glutamine GLN (Q)00%
Proline PRO (P)44.35%
Serine SER (S)88.7%
Arginine ARG (R)00%
Threonine THR (T)66.52%
Tryptophan TRP (W)00%
Valine VAL (V)66.52%
Tyrosine TYR (Y)22.17%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC422
HydrogenH694
NitrogenN110
OxygenO132
SulphurS6

FormulaC422H694N110O132S6
Total Number of Atoms:1364


Total number of positively charged residues (ARG + LYS):7
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    3355
Absorption 0.1% (=1 g/l)    0.349,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.310,   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 : 22.10

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.52, 30.43, 27.17]

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:108.152
Grand average of hydropathicity (GRAVY):0.32