Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5312
Number of amino acids:106
Molecular Weight:11721.9 Da
Theoretical pI:6.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1413.21%
Cysteine CYS (C)98.49%
Glutamic Acid GLU (E)109.43%
Aspartic Acid ASP (D)32.83%
Glycine GLY (G)43.77%
Phynylalanine PHE (F)65.66%
Isoleucine ILE (I)43.77%
Histidine HIS (H)00%
Lysine LYS (K)98.49%
Methionine MET (M)76.6%
Leucine LEU (L)109.43%
Asparagine ASN (N)32.83%
Glutamine GLN (Q)21.89%
Proline PRO (P)43.77%
Serine SER (S)54.72%
Arginine ARG (R)43.77%
Threonine THR (T)65.66%
Tryptophan TRP (W)00%
Valine VAL (V)43.77%
Tyrosine TYR (Y)21.89%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC509
HydrogenH824
NitrogenN132
OxygenO151
SulphurS16

FormulaC509H824N132O151S16
Total Number of Atoms:1632


Total number of positively charged residues (ARG + LYS):13
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    3480
Absorption 0.1% (=1 g/l)    0.297,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.254,   assuming all CYS residues are reduced
Aromaticity:0.075

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.77

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[24.53, 15.09, 38.68]

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:75.6603
Grand average of hydropathicity (GRAVY):0.15