Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1095
Number of amino acids:115
Molecular Weight:11974.71 Da
Theoretical pI:4.46


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1513.04%
Cysteine CYS (C)1412.17%
Glutamic Acid GLU (E)65.22%
Aspartic Acid ASP (D)76.09%
Glycine GLY (G)86.96%
Phynylalanine PHE (F)10.87%
Isoleucine ILE (I)21.74%
Histidine HIS (H)00%
Lysine LYS (K)54.35%
Methionine MET (M)21.74%
Leucine LEU (L)1412.17%
Asparagine ASN (N)43.48%
Glutamine GLN (Q)21.74%
Proline PRO (P)32.61%
Serine SER (S)119.57%
Arginine ARG (R)32.61%
Threonine THR (T)76.09%
Tryptophan TRP (W)00%
Valine VAL (V)65.22%
Tyrosine TYR (Y)54.35%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC501
HydrogenH811
NitrogenN135
OxygenO171
SulphurS16

FormulaC501H811N135O171S16
Total Number of Atoms:1634


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):13
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    8325
Absorption 0.1% (=1 g/l)    0.695,   assuming all pairs of CYS residues form cystines

Ext. coefficient    7450
Absorption 0.1% (=1 g/l)    0.622,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.30

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.35, 22.61, 32.17]

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:82.4347
Grand average of hydropathicity (GRAVY):0.25