Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2102
Number of amino acids:55
Molecular Weight:6029.34 Da
Theoretical pI:8.13


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)11.82%
Cysteine CYS (C)11.82%
Glutamic Acid GLU (E)59.09%
Aspartic Acid ASP (D)23.64%
Glycine GLY (G)1425.45%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)00%
Histidine HIS (H)11.82%
Lysine LYS (K)00%
Methionine MET (M)11.82%
Leucine LEU (L)00%
Asparagine ASN (N)23.64%
Glutamine GLN (Q)47.27%
Proline PRO (P)35.45%
Serine SER (S)59.09%
Arginine ARG (R)814.55%
Threonine THR (T)00%
Tryptophan TRP (W)00%
Valine VAL (V)23.64%
Tyrosine TYR (Y)610.91%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC248
HydrogenH373
NitrogenN87
OxygenO87
SulphurS2

FormulaC248H373N87O87S2
Total Number of Atoms:797


Total number of positively charged residues (ARG + LYS):8
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    8940
Absorption 0.1% (=1 g/l)    1.483,   assuming all pairs of CYS residues form cystines

Ext. coefficient    8940
Absorption 0.1% (=1 g/l)    1.483,   assuming all CYS residues are reduced
Aromaticity:0.109

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 52.97

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.55, 43.64, 12.73]

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:12.3636
Grand average of hydropathicity (GRAVY):-1.68